SequenceManager™

1756 ControlLogix, 1756 GuardLogix, 1769 CompactLogix,

1769 Compact GuardLogix, 1789 SoftLogix, Studio 5000
Logix Emulate

Quick Start Guide Original Instructions

SequenceManager™

Important User Information

Read this document and the documents listed in the additional resources section about installation, configuration, and
operation of this equipment before you install, configure, operate, or maintain this product. Users are required to familiarize
themselves with installation and wiring instructions in addition to requirements of all applicable codes, laws, and standards.
Activities including installation, adjustments, putting into service, use, assembly, disassembly, and maintenance are required to
be carried out by suitably trained personnel in accordance with applicable code of practice.
If this equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be
impaired.
In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages resulting from the use
or application of this equipment.
The examples and diagrams in this manual are included solely for illustrative purposes. Because of the many variables and
requirements associated with any particular installation, Rockwell Automation, Inc. cannot assume responsibility or liability for
actual use based on the examples and diagrams.
No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits, equipment, or software
described in this manual.
Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell Automation, Inc., is
prohibited.
Throughout this manual, when necessary, we use notes to make you aware of safety considerations.
WARNING: Identifies information about practices or circumstances that can cause an explosion in a hazardous environment, which may lead to
personal injury or death, property damage, or economic loss.

ATTENTION: Identifies information about practices or circumstances that can lead to personal injury or death, property damage, or economic loss.
Attentions help you identify a hazard, avoid a hazard, and recognize the consequence.

IMPORTANT Identifies information that is critical for successful application and understanding of the product.

Labels may also be on or inside the equipment to provide specific precautions.

SHOCK HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that dangerous voltage may be present.

BURN HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that surfaces may reach dangerous
temperatures.

ARC FLASH HAZARD: Labels may be on or inside the equipment, for example, a motor control center, to alert people to potential Arc Flash. Arc Flash
will cause severe injury or death. Wear proper Personal Protective Equipment (PPE). Follow ALL Regulatory requirements for safe work practices and
for Personal Protective Equipment (PPE).

2 Rockwell Automation Publication 1756-QS109D-EN-P - October 2020

 Table of Contents

Preface Studio 5000 environment 7

Additional resources 7
Legal Notices 7

Chapter 1
System requirements
Chapter 2
Install SequenceManager Event
Components Chapter 3
SequenceManager and related Logix Designer, Sequence Editor, and Sequence Monitor 14
components overview ControlLogix Firmware 14
SequenceManager Controls 14
SequenceManager Event Handling applications 15

Chapter 4
Overview of Equipment Equipment Sequence Editor 17
Sequence Editor Equipment Sequence Element toolbar 18
Equipment Sequence Element buttons 19
Steps to create an Equipment Sequence diagram 19
Equipment Sequence diagram and Sequential Function Chart routine
differences 20
Equipment Sequence Diagrams 21
Sequence topologies 22
Sequence branch and loop structures 22
Series topology 22
Selective branch overview 24
Selective topology 25
Selective convergence 26
Selective divergence 27
Simultaneous branch overview 27
Simultaneous topology 29
Loop topology 31
Equipment Sequences and Equipment Sequence step commands 32
Create an Equipment Sequence program 34
Define a new Equipment Sequence 35
Configure Equipment Sequence properties 36
Create a Sequence Parameter using the New Parameter or Tag
dialog box 38
Create a selective branch 39
Merge the selective branch 40

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Table of Contents

Example: Construct an Equipment Sequence diagram 41

Prepare the Equipment Sequence diagram 42
Configure simultaneous branches to add and mix material 43
Converge the simultaneously executed paths 44
Construct an Equipment Sequence diagram with a selective
topology 46
Construct an Equipment Sequence diagram with a simultaneous
topology 47
Construct an Equipment Sequence diagram with a simple series
topology 48

Chapter 5
Sequence Execution & Equipment Sequence Monitor 51
Monitoring Sequence Tag Monitor 52
Step states in an Equipment Sequence 52
Step execution in a loop sequence 53
Step execution in an Equipment Sequence 54
Step execution in a selective sequence 55
Step execution in a simultaneous sequence 57
Change active steps in an Equipment Sequence 59
Equipment Phase Properties - Configuration tab fields 61
Transition display states 62
Transition firing states 63
Transition execution 64
Quality of Data 64
How sequence parameters update 65
How sequence output parameter and step input tag expressions
evaluate 66
How step tags update 66
Pause, auto pause, and resume commands 66
Ownership 67
Command a step or Equipment Phase using the Equipment
Sequence Monitor 69
Command a transition using the Equipment Sequence Monitor 69
Change modes effect on sequence and step commands 70
Equipment Sequence failures 71

Chapter 6
SequenceManager event SequenceManager events 74
handling applications Configure Microsoft SQL Server for Reporting Services for
SequenceManager Events 75

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 Table of Contents

Chapter 7
The SequenceManager Controls
Chapter 8
Sequence Summary Control Configure the Sequence Summary Control 79
Configure the Sequence Summary Control to communicate
with a controller 80
Configure the Sequence Summary Control display options 80
Configure the Sequence Summary Control to use VBA 81
Sequence Summary command controls 81
Sequence Summary Control columns in table area 82
Settings and status in the Control footer 83
Command an Equipment Sequence using the Sequence Summary
Control 84

Chapter 9
Sequence Detail Control Configure the Sequence Detail Control 85
Configure the Sequence Detail Control to communicate with a
controller 86
Configure the Sequence Detail Control display options 86
Configure the Sequence Detail Control to use VBA 87
Sequence Detail Control command controls 87
Overview of the Sequence Detail Control status header area 89
Overview of the Sequence Detail Control status footer area 90
Monitor a step in the Sequence Detail Control 90
Monitor a transition in the Sequence Detail Control 92

Chapter 10
Sequence Parameters Control Configure the Sequence Parameters Control 93
Configure the Sequence Parameters Control to communicate
with a controller 94
Configure the Sequence Parameters Control display options 94
Configure the Sequence Parameters Control to use VBA 95
Sequence Parameters Control property settings 96
Modify step tags or sequencing parameters using the Sequence
Parameters Control 99
Index

Rockwell Automation Publication 1756-QS109D-EN-P - October 2020 5

 Preface

Studio 5000 environment The Studio 5000 Automation Engineering & Design Environment® combines
engineering and design elements into a common environment. The first
element is the Studio 5000 Logix Designer® application. The Logix Designer
application is the rebranding of RSLogix 5000® software and will continue to
be the product to program Logix 5000™ controllers for discrete, process,
batch, motion, safety, and drive-based solutions.

The Studio 5000® environment is the foundation for the future of

Rockwell Automation® engineering design tools and capabilities. The Studio
5000 environment is the one place for design engineers to develop all
elements of their control system.

Additional resources These documents contain additional information concerning related

Rockwell Automation products.
Resource Description
Industrial Automation Wiring and Grounding Provides general guidelines for installing a Rockwell
Guidelines, publication 1770-4.1 Automation industrial system.

Product Certifications webpage, available at Provides declarations of conformity, certificates,

http://ab.rockwellautomation.com and other certification details.

View or download publications at

http://www.rockwellautomation.com/literature. To order paper copies of
technical documentation, contact the local Rockwell Automation distributor
or sales representative.

Legal Notices Rockwell Automation publishes legal notices, such as privacy policies, license
agreements, trademark disclosures, and other terms and conditions on the
Legal Notices page of the Rockwell Automation website.

Rockwell Automation Publication 1756-QS109D-EN-P - October 2020 7

Preface

End User License Agreement (EULA)

You can view the Rockwell Automation End-User License Agreement ("EULA")
by opening the License.rtf file located in your product's install folder on your
hard drive.

Open Source Licenses

The software included in this product contains copyrighted software that is
licensed under one or more open source licenses. Copies of those licenses are
included with the software. Corresponding Source code for open source
packages included in this product are located at their respective web site(s).
Alternately, obtain complete Corresponding Source code by contacting
Rockwell Automation via the Contact form on the Rockwell Automation
website: http://www.rockwellautomation.com/global/about-
us/contact/contact.page
Please include "Open Source" as part of the request text.
A full list of all open source software used in this product and their
corresponding licenses can be found in the OPENSOURCE folder. The default
installed location of these licenses is C:\Program Files (x86)\Common
Files\Rockwell\Help\FactoryTalk Services Platform\Release
Notes\OPENSOURCE\index.htm.

8 Rockwell Automation Publication 1756-QS109D-EN-P - October 2020

 Chapter 1

System requirements

Review these minimum and recommended system requirements for

installing, configuring, and running SequenceManager Event Console. Unless
noted, these requirements assume that no other applications are installed on
the computer. Preferred operating systems and software applications are
prioritized for support, testing, and post-release patch qualifications.
Systems that do not meet the minimum requirements for the version of the
operating system and database being used are not covered under warranty.
IMPORTANT For more information about supported operating systems and other Rockwell
Software product version support, refer to the Product Compatibility and Download
Center (PCDC).

Operating systems
Ensure that all selected hardware is on the compatibility list for any one of the
following:
• Windows Server®
Windows Server 2019 Standard Edition (preferred)
Windows Server 2016 Standard Edition (preferred)
Windows Server 2019 DataCenter Edition
Windows Server 2016 DataCenter Edition
Windows Server 2012 R2 Standard Edition or DataCenter
Windows Server 2012 Standard Edition or DataCenter
• Windows®
Windows 10 Professional (64-bit) Build 1909 or later (preferred)
Windows 10 Enterprise (64-bit) Build 1909 or later

Database applications
• SQL Server®
SQL Server 2019 (English version only)
SQL Server 2017 (English version only)
SQL Server 2016 Service Pack 1 (English version only)
SQL Server 2014 Service Pack 3 (32-bit and 64-bit, English version only)
SQL Server 2012 Service Pack 4 (32-bit and 64-bit, English version only)

Rockwell Automation Publication 1756-QS109D-EN-P - October 2020 9

Chapter 1 System requirements

Rockwell Software
• Logix Designer version 33
• FactoryTalk Linx version 6.20 (CPR 9 SR 12) or later
• FactoryTalk Activation version 4.04 or later
• >FactoryTalk Services Platform version6.20 (CPR 9 SR 12) or later
• FactoryTalk View SE version 12.0 (preferred)
• FactoryTalk View SE version 11.0

Rockwell Automation Test Environment

Rockwell Automation tests software products under a standard configuration
of operating systems and antivirus software. For additional information see
the Knowledgebase Document ID: PN24 - Rockwell Software Products and
Antivirus Software.

10 Rockwell Automation Publication 1756-QS109D-EN-P - October 2020

 Chapter 2

Install SequenceManager Event Components

Install SequenceManager Event Components to start the event handling

services.
Important: If this install is an upgrade to the Batch system and the
BatchHistoryEx SQL database is already being used, back up the
database before installing the SequenceManager Event
Components.

To install SequenceManager Event Components:

1. Access the Product Compatibility and Download Center (PCDC) to
download the SequenceManager Event Install.exe.
2. Run the SequenceManager Event Install.exe file to install the
SequenceManager Event Components.
3. To read the end-user license agreement, select license terms and
conditions. Then select the check box to accept the terms and
conditions. Select Next.
4. Select the SequenceManager Event Components to install:
• Batch History Database and Reports
Important: The database is selected to migrate by default. If Overwrite is
selected, the existing Batch history database will be deleted.

• If SQL authentication is being used, select Use SQL Authentication

and then enter the SQL Username and the SQL Password.
5. Select Install.
Close the installation window when the installation has complete.

See also
SequenceManager and related components overview on page 13

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 Chapter 3

SequenceManager and related components

overview

Use the SequenceManager to model and execute sequential manufacturing

processes using the ControlLogix features described in the following tasks:
• Configure the coordination of Equipment Phase execution using the
Equipment Sequence Editor.
• Execute Equipment Sequence programs using ControlLogix.
• Monitor and manage running Equipment Sequences using the Logix
Designer application.
• Enable operators to monitor and manage running Equipment
Sequences and Equipment Phases by adding SequenceManager
ActiveX controls to FactoryTalk View SE displays.
• Subscribe and collect generated sequence events using
SequenceManager Event Client Service and SequenceManager Event
Archiving Service.
The following diagram illustrates the components that are part of the
SequenceManager and their responsibilities.

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Chapter 3 SequenceManager and related components overview

See also
Logix Designer, Sequence Editor, and Sequence Monitor on page 14
ControlLogix Firmware on page 14
SequenceManager Controls on page 14

SequenceManager Event Handling applications on page 15

Logix Designer, Sequence The Equipment Sequence Editor is used to create Equipment Sequence
programs. The sequence diagram defines a sequence of Equipment Phases to
Editor, and Sequence be run, the order of execution, and their parameter data necessary to make
Monitor the product. Input and output parameters are defined in the Equipment
Sequence using the Sequence Tag Editor. Equipment Sequence programs and
their tags are fully integrated with all Logix program and tag authoring
capabilities.
The Equipment Sequence Monitor is the online version of the Equipment
Sequence Editor and is used to monitor and interact with Equipment
Sequences that have been downloaded to the controller. The control engineer
can do the following:
• Command the Equipment Sequence.
• Change the value of parameters and attributes.
• Interact with the executing sequence.

See also
SequenceManager and related components overview on page 13

ControlLogix Firmware The Equipment Sequence program firmware implements all the code
necessary to manage the use of Equipment Phase programs, shares data
between a sequence program and one or more Equipment Phase programs,
and coordinates execution of the Equipment Phases.
When an Equipment Sequence or sequence element changes status or an
operator interacts with the Equipment Sequence, the firmware generates an
event. Once an event is generated, it is published for external applications to
receive.

See also
SequenceManager and related components overview on page 13

SequenceManager Controls The SequenceManager ActiveX controls provide operator visualization of the
Equipment Sequence program. There are three operator controls for viewing
and interacting with the Equipment Sequences.

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 Chapter 3 SequenceManager and related components overview
The Sequence Detail Control provides the operator with a detailed view of an
Equipment Sequence, including its chart structure, steps, and transitions. The
runtime status of the sequence program and its sequence elements are also
shown. The operator can command the Equipment Sequence from this
control.
The Sequence Summary Control displays the sequence program status for
each of the Equipment Sequences downloaded to the controller. The
Sequence Summary Control also allows the operator to view and command a
selected Equipment Sequence.
The Sequence Parameters Control displays a table of all sequencing
parameters and step tags of a specified Equipment Sequence, and allows the
operator to command a selected sequencing parameter or step tag. To refine
the display, configure the table to filter the information displayed.

See also
SequenceManager and related components overview on page 13
Logix Designer, Sequence Editor, and Sequence Monitor on page 14
ControlLogix Firmware on page 14

SequenceManager Event The SequenceManager Event Services Console provides the user interface for
performing the following tasks:
Handling applications
The Equipment Sequence Manager Event Services Console provides the user
interface for performing the following tasks:
• Start and stop the Equipment Sequence Manager Event Client Service
and the Equipment Sequence Manager Event Archiving Service.
• Display the status of Equipment Sequence Manager Event Client
Service and the Equipment Sequence Manager Event Archiving
Service.
• Configure the Equipment Sequence Manager Event Client Service
Settings and Sequence Manager Event Archiving Service Settings.
The SequenceManager Event Client, a service external to the controller,
receives the event from the general event log. The Event Client saves
generated raw events into a temporary file.
The SequenceManager Archiving Service processes the raw event files,
localizing, translating, and assembling data into the formats used by PlantPAx
Historian and reporting applications. This data is written to an .EVT file and
there is an option to write to a SQL Server database.
PlantPAx applications read the generated events and process them.
Tip: The SequenceManager Event Handling applications are installed
separately from the Logix Designer installation process.

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Chapter 3 SequenceManager and related components overview

See also
SequenceManager and related components overview on page 13
Logix Designer, Sequence Editor, and Sequence Monitor on page 14
ControlLogix Firmware on page 14

SequenceManager Controls on page 14

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 Chapter 4

Overview of Equipment Sequence Editor

The following image identifies the main areas of the Equipment Sequence
Editor.

Item Name Description

Equipment Sequence Use to add sequence elements to the equipment sequence
Editor toolbar diagram.
Equipment Sequence Use to construct and configure equipment sequence
Diagram workspace diagrams.
Sequence Tag Editor Use to add and configure parameters for the equipment
phase steps in the equipment sequence diagram.
Equipment Sequence tabs Use to select and navigate different equipment sequence
diagrams under the tasks.

See also
Equipment Sequence Element toolbar on page 18
Equipment Sequences and Equipment Sequence step commands on
page 32

Equipment Sequence Editor The Equipment Sequence Editor is contained within the routine window in
the main Logix Designer application window. Use this editor to edit
Equipment Sequence diagram routines. The routine window contains tabs for
all open routines, a view for each routine, and the Equipment Sequence
toolbar. When a new sequence diagram is first shown, it contains an initial

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Chapter 4 Overview of Equipment Sequence Editor
step, linked to a transition with the default expression TRUE, linked to a
terminal step.
The Equipment Sequence Editor layout consists of the Equipment Sequence
Element toolbar, the Equipment Sequence Diagram workspace, and the
Sequence Tag Editor.
Equipment Sequence Element toolbar - When offline and editing an
Equipment Sequence, the Equipment Sequence Element toolbar adds steps,
transitions, and branch structures to the sequence diagram.

Equipment Sequence Diagram workspace - Use to construct and configure

Equipment Sequence diagrams.

Sequence Tag Editor - Use the Sequence Tag Editor to add and configure
sequencing parameters and configure step tag properties. All sequencing
parameters and step tags are listed in a table format. The Sequence Tag Editor
is the grid that displays at the bottom of the Equipment Sequence diagram.

See also
Create an Equipment Sequence program on page 34

Equipment Sequence How do I access the Equipment Sequence Element toolbar?

Element toolbar Double-click the diagram icon in the Controller Organizer to open an
equipment sequence diagram.

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 Chapter 4 Overview of Equipment Sequence Editor
The Equipment Sequence Element toolbar is available in the offline mode
only. Use the buttons on the Equipment Sequence Element toolbar to add
steps, transitions, and branch structures to a sequence diagram.

See also
Equipment Sequence Element buttons on page 19

Sequence topologies on page 22

Sequence branch structures on page 22

Equipment Sequence The following table describes the purpose of each Equipment Sequence
Element.
Element buttons
Icon Icon Name Description
Add Step and Transition Pair Use Add Step and Transition Pair to add a step and transition pair.
Although added as a pair, you can select and edit each element separately.
Add Disconnected Step Use the Add Disconnected Step to add a step without adding a
transition.
Add Disconnected Transition Use Add Disconnected Transition to add a transition without adding
a step.
Add Simultaneous Divergence Use Add Simultaneous Divergence to create a branch where all
linked steps execute simultaneously.
Add Selective Divergence Use Add Selective Divergence to create a divergence for a
selective branch. In a selective divergence, only one of multiple paths is
executed--the path containing the transition that first evaluates as TRUE.
Add Simultaneous Convergence Use Add Simultaneous Convergence to merge simultaneous
execution paths back together.
Add Selective Convergence Use Add Selective Convergence to merge selective divergent paths
back into one execution path in the selective branch.

See also
Equipment Sequence Element toolbar on page 18
Construct an Equipment Sequence diagram on page 41

Steps to create an An Equipment Sequence diagram is a graphical representation of a sequence

that coordinates the execution of equipment. Each diagram comprises basic
Equipment Sequence sequence elements such as steps, links, and transitions structured in a
diagram specific topology. Each Equipment Sequence will have one routine that is
configured by adding elements and applying branch structures using buttons
available from the Equipment Sequence Element toolbar in the Equipment
Sequence Editor.

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Chapter 4 Overview of Equipment Sequence Editor
Once the need for an Equipment Sequence has been determined, the tasks
listed in the following table should be done to create the Equipment Sequence.
Task How
Identify and create Equipment Considering the equipment associated with an operational unit of
Phases equipment, identify the actions that equipment can perform.

Identify the manufacturing procedure Analyze the manufacturing process and break it into a series of
to be automated manufacturing actions or steps that are performed serially,
conditionally, or simultaneously. Identify the conditions when one
manufacturing step should stop and the next be started.
Configure the Sequence Diagram Construct the diagram routine to model the manufacturing process.
Each step represents one use of an Equipment Phase to perform an
action. Code the conditions for starting and stopping actions as
transition expressions.
Configure Sequencing Parameters Analyze the materials and ingredients used by each manufacturing
and Step Tags action. The sequencing input parameters provide data to the
Equipment Sequence program. The data provided is available to the
Equipment Phase input parameters via step input tags.
Analyze the reporting requirements. Generated actual values should
be stored into the Equipment Phase output parameters. The value of
the Equipment Phase output parameter is copied to its associated
step output tag when requested to do so or automatically when the
phase becomes STOPPED, ABORTED, or COMPLETE. Sequencing output
parameters evaluate their expressions when the sequence becomes
STOPPED, ABORTED, or COMPLETE.

An Equipment Sequence diagram is intended to control a specific piece of

equipment. All steps within the sequence refer to existing Equipment Phase
instances within the same controller.

See also
Equipment Sequence diagrams and Sequential Function Chart
routines differences on page 20

Equipment Sequence Use the following table to guide decisions about when to use an Equipment
Sequence diagram instead of a Sequential Function Chart routine.
diagram and Sequential
Sequential Function Chart routine Equipment Sequence diagram
Function Chart routine Is a single routine. Coordinates the execution of independent
programs.
differences No concept of state beyond inhibited. Has an internal state machine to manage sequence
execution and display states that are useful to
operators.
A step contains a list of structured text actions to A step has an internal state machine managing
perform. interactions between a sequence and the step's
associated Equipment Phase.
Transitions enable and disable scanning of a step's Transitions have an internal state machine
actions. managing when steps are activated, deactivated,
and automatically commanded.

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 Chapter 4 Overview of Equipment Sequence Editor
Sequential Function Chart routine Equipment Sequence diagram
Operators specify tag values but do not expect to Operators expect to interact with the sequence, the
run the program interactively. steps, the parameters, and the transitions.
Program runs after download, unless inhibited. Sequences wait to be commanded after download.

See also
Equipment Sequence Editor on page 17

Equipment Sequence An Equipment Sequence diagram is a graphical representation of a sequence

that coordinates the execution of equipment. Each diagram comprises basic
Diagrams sequence elements such as steps, links, and transitions structured in a
specific topology. Each Equipment Sequence will have one routine that is
configured by adding elements and applying branch structures using buttons
available from the Equipment Sequence Element toolbar in the Equipment
Sequence Editor.

See also
Steps to create Equipment Sequence diagrams on page 19

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Chapter 4 Overview of Equipment Sequence Editor

Sequence topologies A sequence topology is the arrangement of the step and transition elements
in an Equipment Sequence. A sequence topology determines the order in
which steps within the sequence execute.

See also
Sequence branch and loop structures on page 22
Series topology on page 22
Selective topology on page 25

Simultaneous topology on page 29

Loop topology on page 31

Sequence branch and loop Equipment Sequence branches allow you to define steps in parallel paths that
run simultaneously, or the conditional execution of a specific path among
structures multiple alternate paths. Branches define the path for a subdivision of step
elements within the diagram. You can create selective branches and
simultaneous branches. Additionally, you can add loops to the diagram. A loop
is a branching structure containing a selective convergence followed by a
selective divergence.

Divergence and convergence

When creating an alternate (selective) or parallel (simultaneous) path for the
execution of steps in an Equipment Sequence diagram by adding a
simultaneous or selective branch, it creates a divergence. Merge branch paths
back into one path using a convergence branch.

See also
Simultaneous topology on page 29

Selective topology on page 25

Sequence topologies on page 22

Series topology A series topology consists of a linear ordering of steps and transitions. Steps
in the sequence execute directly one after another in series without any
branching or looping.

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 Chapter 4 Overview of Equipment Sequence Editor
The following example shows an Equipment Sequence diagram that uses a
series topology.

Item Name Description

Initial step When the sequence is commanded to START, this step becomes active.
Transition When this transition becomes TRUE, the first step in the sequence becomes active.

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Chapter 4 Overview of Equipment Sequence Editor
Steps in series sequence Each step becomes active and executes when its preceding transition becomes TRUE.
Transition The last transition in the series.
End step When the end step changes to COMPLETE, the Equipment Sequence becomes complete.

See also
Selective topology on page 25
Simultaneous topology on page 29
Loop topology on page 31

Simultaneous branch overview on page 27

Selective branch overview A selective branching structure is a conditional (OR) type of branch with two
or more alternate parallel paths where only one path is selected for execution.

Selective divergence and convergence

The starting point for a selective branch is a selective divergence. When
adding a selective divergence, attach a transition to begin each alternative
execution path. At runtime, the first transition in each divergent path is
evaluated. The first transition to evaluate TRUE deactivates the other
transitions and activates the step following it. Sequence execution continues
in the selected path until the selective convergence is met.
The ending point for a selective branch is a selective convergence. When
adding a selective convergence, the final transition of each divergent path is
linked to the branch. At runtime, after the final transition in the selected path
is evaluated, execution continues in the merged path.
In a manufacturing process, it is common to execute one branch in preference
over another. For example, adding liquid sweetener requires different
equipment and processes than adding a powdered sweetener. A selective
branch specifies a set of paths and one path is selected for execution. The first
transition expression to evaluate TRUE is executed.

See also
Selective topology on page 25
Selective convergence on page 26

Selective divergence on page 27

Create a selective branch on page 39
Merge the selective branch on page 40

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 Chapter 4 Overview of Equipment Sequence Editor

Selective topology A selective topology has two or more alternate paths in which only one path is
selected for execution. In a selective branch, only the step in the path or
branch under the first transition to evaluate as TRUE is executed. Other paths
or branches are ignored. Sequence execution continues in the selected path
until that path's final transition.
Tip: All transitions following the selective divergence are active and evaluate
their expressions with every scan of the sequence.

The following example shows an Equipment Sequence diagram that uses a

selective topology.

Item Name Description

Initial step When the sequence is commanded to START, this step becomes active.

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Chapter 4 Overview of Equipment Sequence Editor
Selective divergence The starting point for a selective branch is a selective divergence. When you add a
selective divergence, attach a transition to begin each alternative execution path. At
runtime, the first transition in each divergent path is evaluated. The first transition to
evaluate TRUE deactivates the other transitions and activates the step following it.
Sequence execution continues in the selected path until the selective convergence is
met.
First transition in the The first transition following the selective branch to evaluate as TRUE determines the
selective branch execution path.
First step in selective Only the steps in the path with the first transition to evaluate as TRUE become active.
branch
Last transition in branch After the final transition in the execution path evaluates as TRUE, sequence execution
path continues in the merged path.
Selective convergence The ending point for a selective branch is a selective convergence. When you add a
selective convergence, the final transition of each divergent path is linked to the branch.
At runtime, after the final transition in the selected path is evaluated, execution
continues in the merged path.
End step When the end step changes to COMPLETE, the Equipment Sequence becomes complete.

See also
Merge the selective branch on page 40
Series topology on page 22

Simultaneous topology on page 29

Loop topology on page 31

Selective convergence The ending point for a selective branch is a selective convergence. When
adding a selective convergence, the final transition of each divergent path is
linked to the branch. At runtime, after the final transition in the selected path
is evaluated, execution continues in the merged path.

Item Description
A selective branch specifies a set of paths and one path is selected for execution.
The first transition expression to evaluate TRUE is executed.

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 Chapter 4 Overview of Equipment Sequence Editor
The simultaneous convergence merges the selective execution paths. Execution
continues in the merged path.

See also
Selective branch overview on page 24
Construct an Equipment Sequence diagram with a selective topology
on page 46

Selective divergence The starting point for a selective branch is a selective divergence. When
adding a selective divergence, attach a transition to begin each alternative
execution path. At runtime, the first transition in each divergent path is
evaluated. The first transition to evaluate TRUE deactivates the other
transitions and activates the step following it. Sequence execution continues
in the selected path until the selective convergence is met.

Item Description
A selective branch specifies a set of paths and one path is selected for execution.
The first transition expression to evaluate TRUE is executed.
The simultaneous convergence merges the selective execution paths. Execution
continues in the merged path.

See also
Selective branch overview on page 24
Construct an Equipment Sequence diagram with a selective topology
on page 46

Simultaneous branch A simultaneous branch is a type of branch with two or more parallel paths
where all paths within the branch are selected to execute at the same time.
overview This is also known as a non-conditional (AND) branch.

Simultaneous divergence and convergence

A simultaneous divergence is a branching structure that allows steps in two or
more paths to run in parallel.

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Chapter 4 Overview of Equipment Sequence Editor
A simultaneous convergence is a branching structure that brings together two
or more paths run in parallel into a single path.
In a manufacturing process, it is common to execute several branches at the
same time. For example, adding two separate materials while mixing the
same materials. One approach is to build three Equipment Sequences.
Another approach is to define all three processes within a single Equipment
Sequence and execute the processes simultaneously at run-time. A
simultaneous branch specifies all the paths and executes them
simultaneously. All steps linked to the simultaneous branch must be active
before the transition below the simultaneous convergence will evaluate.

The following example shows a simultaneous branch and its elements.

This example shows three simultaneous paths: one to add Material_A, one to
add Material_B, and one to mix the ingredients. Item 1 shows the transition
evaluating TRUE, resulting in the simultaneous execution of the first step of
each path. The simultaneous divergence in item 2 creates the three paths to
execute in item 3. In item 4, the first step of each path is configured. The
simultaneous convergence in item 5 merges all three simultaneous paths back
together. Tran_006 in item 6 begins evaluating when all steps above the
simultaneous convergence are active. When the transition expression
evaluates TRUE, execution of the simultaneous paths ends and execution
continues to the next step.

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See also
Simultaneous topology on page 29

Simultaneous topology A simultaneous topology has two or more parallel paths that execute their
steps at the same time. In a simultaneous branch, the steps immediately
following a simultaneous divergence branch start execution together. Step
execution continues in all paths until the transition following the
simultaneous convergence evaluates as TRUE. To execute across the
simultaneous convergence branch, all steps immediately preceding the
convergence must be active and the transition (Transition 3 in the example)
immediately following the convergence must evaluate as TRUE.
Important: All the steps immediately following the simultaneous divergence
are active and become active at the same time. If one step cannot
be activated (attached), the other steps do not start to execute
until all are active.

The following example shows an Equipment Sequence diagram that uses a

simultaneous topology.

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Chapter 4 Overview of Equipment Sequence Editor

Item Name Description

Initial step When the sequence is commanded to START, this step becomes active.
Transition preceding branch Transition preceding the simultaneous branch. After it evaluates as TRUE, all steps linked
to the simultaneous branch become active.
Simultaneous divergence A simultaneous divergence is a branching structure that allows steps in two or more
paths to run in parallel.
Branch paths The series of steps forming one path within the simultaneous branching structures. All
first steps in all branch paths become active and start execution at the same time.
Simultaneous convergence A simultaneous convergence is a branching structure that brings together two or more
paths run in parallel into a single path.
Transition following branch Transition following the simultaneous branch. After it evaluates as TRUE, sequence
execution continues in the merged path.
End step When the end step changes to COMPLETE, the Equipment Sequence becomes complete.

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 Chapter 4 Overview of Equipment Sequence Editor
Important: The transition following the simultaneous convergence will not
begin evaluating its expression until all the steps preceding it are
active. Using the illustration above, for example, this ensures that
step Complete_Add_B is executed even if Tran_001's expression
evaluates TRUE before Complete_Add_B is run.

See also
Series topology on page 22
Selective topology on page 25
Loop topology on page 31

Simultaneous branches on page 27

Loop topology A loop topology has a path of execution that links back into a preceding step
to create a loop which repeats the execution of steps.
The example shows an Equipment Sequence diagram that contains a
sequence loop.

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Chapter 4 Overview of Equipment Sequence Editor
Item Name Description
Transition preceding a This transition serves to stop the preceding step and start its following step, just as any
branching structure transition does in a series.
Selective convergence This is the way the loop structure is entered.

Selective divergence This is the way the loop structure is exited.

Transition after the If the transition in the loop evaluates as true, the loop becomes the execution path.
selective divergence branch
for the loop
Transition after the If the transition in this path evaluates as TRUE, this path is the execution path.
selective divergence for the
non-loop path

See also
Sequence topologies on page 22
Sequence branch and loop structures on page 22

Equipment Sequences and The following table shows the commands that can be used with Equipment
Sequences, and Equipment Sequence steps with their associated Equipment
Equipment Sequence step Phases. When you hover over the icon, the button background shows a dark
commands shade of blue and a dark blue outline.
Icon Command Description
Start The Start button commands:
• The Equipment Sequence to start execution.
• The Equipment Sequence step and the associated phase to start.
Hold The Hold button commands:
• The Equipment Sequence to hold active transitions and active steps and
their associated Equipment Phases.
• The Equipment Sequence step and its associated phase to hold.
Reset The Reset button commands:
• The Equipment Sequence to reset active transitions and active steps and
their associated Equipment Phases.
• The Equipment Sequence step and its associated phase to reset.
Abort The Abort button commands:
• The Equipment Sequence to hold active transitions and active steps and
their associated Equipment Phases.
• The Equipment Sequence step and its associated phase to abort.
Stop The Stop button commands:
• The Equipment Sequence to stop active transitions and active steps and
their associated Equipment Phases.
• The Equipment Sequence step and its associated phase to stop.
Restart The Restart button commands:
• The Equipment Sequence to restart active transitions and active steps and
their associated Equipment Phases from a HELD state.
• The Equipment Sequence step and its associated phase to restart from a
HELD state.

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Icon Command Description
Pause The Pause button commands:
• The Equipment Sequence to pause execution of the sequence when active
transition expressions evaluate TRUE.
• The Equipment Sequence step and its associated phase to enable pausing
when an Equipment Phase Paused (PPD) instruction is executed.
When the Pause button is on, the button background is a light blue with a
dark blue outline.
A Resume command disables the Pause command so the Equipment
Sequence or Equipment Sequence step with its associated phase runs
normally until commanded to pause again.
Auto Pause The Auto Pause button commands:
• The Equipment Sequence to pause execution of the sequence when active
transition expressions evaluate TRUE.
• The Equipment Sequence step and its associated phase to enable pausing
when an Equipment Phase Paused (PPD) instruction is executed.
When the Auto Pause button is on, the button background is a light blue with
a dark blue outline.
A Resume command disables the command to pause, the Auto Pause
command sets the Pause Enabled flag to TRUE.
Resume The Resume button commands:
• The Equipment Sequence to resume execution of the sequence.
• The Equipment Sequence step and its associated phase to resume
execution.
For an Equipment Sequence, all transitions in the FIRING state will fire
(stopping and resetting preceding steps, attaching, and starting trailing
steps).
The Resume command clears the effects of the Pause command, reinitiates
execution, and if Auto Pause is enabled, reestablishes the Pause.

Equipment Sequence only commands

The following table shows the commands that can be used with Equipment
Sequences only.
When you hover over the icon, the button background shows a dark shade of
blue and a dark blue outline. When the button is toggled on, the button
background is a light blue with a dark blue outline.
Icon Command Description

Take Ownership Taking ownership means that this application now has the right to command
this Equipment Sequence; other internal sequencers, external sequencers, and
operators are not allowed to command this sequence.
When you have not taken ownership, the icon appears as .

When you click to take ownership, the icon appears as .

Releasing Releasing ownership means that internal sequencers, external sequencers, and
Ownership operators with attachments are allowed to command this sequence.

When you have taken ownership, the icon appears as .

When you click to release ownership, the icon appears as .

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Chapter 4 Overview of Equipment Sequence Editor
Icon Command Description

Set Sequence ID The Set Sequence ID button assigns the user-specified sequence ID to the
Equipment Sequence.
Automatic A sequence can operate in two modes: Automatic and Manual.
Automatic mode allows the sequencing engine to automatically coordinate
executing the sequence.
When you are in Automatic mode, the icon appears as .

When you click to enter Manual mode, the icon appears as .

You can command a sequence to change modes when the sequence is active.
Manual A sequence can operate in two modes: Automatic and Manual.
Manual mode does not allow transitions to complete firing, so operators and
control engineers directly command steps and their attached phases without
interruption from the sequencing engine.

When you are in Manual mode, the icon appears as .

When you click to enter Automatic mode, the icon appears as .

You can command a sequence to change modes when the sequence is active.
Initialize Tags The Initialize Tags button updates all sequencing parameter and step tag
value members with the configured Initial Value. Also sets the tag's Valid
member equal to the value of the InitializeAsValid flag.
Enabled if the sequence's state is Idle, and the controller is online.
Change Active The Change Active Step command is a way to change the set of active
Step elements within an executing sequence. The sequence must be in Manual
mode so transitions will not fire and change the set of steps that are active.
Clear Failures The Clear Failures command, when applied to a sequence, causes the failure
flags on the sequence and all steps and their associate phases to be reset,
clearing them. All visual indication of the presence of failures in the sequence
and on specific steps are cleared. If the cause of the failure has not been
resolved, the next scan by the equipment sequence engine regenerates the
failure.

See also
Change active steps in an Equipment Sequence on page 59

Create an Equipment Equipment Sequence programs:

Sequence program • Describes the order in which Equipment Phases run and when they are
started and stopped.
• Run as a program containing only one routine—the sequence diagram.
• Use sequence input parameters and sequence output parameters.
• Displays the same states as a phase. The current state is based on active
sequence elements.
Add steps, transitions, links, divergent and convergent branches to manually
construct Equipment Sequences. Equipment Sequences are created in either
simple series, loop, simultaneous, or selective structures.

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To create Equipment Sequence programs:

1. Define a new Equipment Sequence.
2. Configure Equipment Sequence properties.
3. Construct Equipment Sequence diagrams. See Equipment Sequence
Diagrams.
4. Create a Sequence Parameter using the New Parameter or Tag dialog
box.
Important: When the Equipment Sequence scan rate is significantly longer
than the Equipment Phase scan rate, sequence events triggered by
step state changes may not be generated. If having those event
records is necessary, it is advisable to avoid phase state changes
occurring in less than the sequence scan rate.

See also
Equipment Sequence Diagrams on page 21

Define a new Equipment In New Equipment Sequence, define the properties of an Equipment
Sequence.
Sequence

Before you begin:

• Go offline with the controller.

To define a new Equipment Sequence:

1. Go to File > New Component > Equipment Sequence to enter
properties for the new Equipment Sequence.
2. In Name, enter a name for the Equipment Sequence.
3. (Optional) In Description, enter a description for the Equipment
Sequence.
4. (Optional) To make the Equipment Sequence program a child of an
existing program in the logical model, select the Parent program.
Otherwise, select None.
5. From Schedule In, choose the task to schedule the Equipment
Sequence.
The list contains only tasks in which the Equipment Sequence can be
scheduled. If you created the Equipment Sequence by right-clicking a
task in the Controller Organizer, that task is selected by default.
6. (Optional) To give the Equipment Sequence a version string for event
reporting purposes, select from the menus for Major and Minor, and
enter text in Extended Text.

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Chapter 4 Overview of Equipment Sequence Editor
• Major: The major revision number of the Equipment Sequence. The
default value is 1.
• Minor: The minor revision number of the Equipment Sequence. The
default value is 0.
• Extended Text: Enter additional revision information. For example,
entering c in this field, makes the Equipment Sequence version 1.0c.
The maximum number of displayable characters is 40. Any
characters exceeding the limit are ignored.
7. (Optional) To continue describing the Equipment Sequence revision,
use the Revision Note.
For example, list the changes made to the Equipment Sequence since
the last revision.
8. (Optional) To inhibit this Equipment Sequence and prevent it from
being owned or commanded, select Inhibit Sequence. The check box
is cleared by default.
An Equipment Sequence’s icon displays in the Controller Organizer
with the inhibited indicator:
9. (Optional) To open the Equipment Sequence Editor upon creation of
a sequence, select Open Sequence Diagram. The check box is selected
by default.
10. To configure additional Equipment Sequence attributes upon creation
of a sequence, select Open properties. The check box is clear by
default. Click OK to open Equipment Sequence Properties.

See also
Configure Equipment Sequence properties on page 36

Configure Equipment Configure Equipment Sequence properties in the Equipment Sequence

Properties dialog box, Configuration tab.
Sequence properties

Before you begin:

• Go offline with the controller.
All transitions following the selective divergence are active and evaluate their
expressions with every scan of the sequence.

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To configure Equipment Sequence properties:

1. Open the Equipment Sequence Properties dialog box by right-
clicking the Equipment Sequence name in the Controller Organizer
or Logical Organizer and selecting Properties.
2. Click the Configuration tab and revise the properties as necessary.
a. (Optional) Select Retain sequence ID when resetting sequence to
retain the sequence ID when resetting the Equipment Sequence. If
this option is not selected, a RESET command clears the Sequence
ID value of an Equipment Sequence.
b. (Optional) Select the Generate sequence events option to generate
sequencing events recording the manufacturing process. This
includes operator commands, changes in sequence attributes, and
changes in sequencing parameters and step tag values.
c. (Optional) If you selected the Generate sequence events option,
enter a number for the Unit ID option. The Unit ID is an integer
value assigned to represent the equipment unit the sequence is
coordinating. This value is recorded with sequence events to
identify the equipment coordinated.
d. (Optional) When starting sequence, there are two options:
• Use initial value of the tag: Select this option to reinitialize all
sequencing parameter and step tag value fields with their
configured Initial Value field when a START command is sent to
the Equipment Sequence.
• Use current value of the tag: Select this option to retain the
value of all sequencing parameter and step tag valuefields when a
START command is sent to the Equipment Sequence.
e. (Optional) When resetting sequence, there are two options:
• Restore the tag to its initial value: Select this option to
reinitialize all sequencing parameter and step tag value fields
with their configured Initial Value field when a RESET
command is sent to the sequence.
• Maintain current value of the tag: Select this option to retain
the value of all sequencing parameter and step tag value fields
when a RESET command is sent to the sequence.

See also
Equipment Sequence Diagrams on page 21

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Chapter 4 Overview of Equipment Sequence Editor

Create a Sequence Sequence input parameters define the set of parameters that must be
provided to an Equipment Sequence program to coordinate manufacturing a
Parameter using the New product. The sequence output parameters record process variables set during
Parameter or Tag dialog execution.

box
Before you begin:
• Go offline with the controller.

To create a sequence parameter:

1. In the Equipment Sequence, right-click Parameters and Local Tags.
2. Select New Parameter.
3. In Name, enter the name of the sequence parameter.
4. (optional) In Description, enter a description of the sequence
parameter.
5. In Usage, select one of the following:
• Input Parameter
• Output Parameter
6. In Data Type, click to access the Select Data Type dialog box and
select one of the sequence parameter data types.
Sequence parameters only allow these system provided data types:
SEQ_DINT, SEQ_SINT, SEQ_INT, SEQ_REAL, SEQ_BOOL, and
SEQ_STRING.
7. (optional) In Parameter Connection, choose a single connection for
the sequence parameter.
8. Scope shows the new Equipment Sequence where the new parameter
is created.
9. In External Access, choose whether the sequence parameter will have
Read/Write, Read Only, or no (None) access from external
applications such as HMIs.
Tip: It is recommended to have input parameters use Read/Write access, and
output parameters use Read Only access. Often, inputs are assigned by an
operator and outputs need to maintain the integrity of the value assigned
to it by the sequence.
10. Verify the Sequencing check box is selected. This is the default.
11. Click Create for create options. Select:
• Create and Close to close the dialog box after creating a tag
(default).
• Create and Open New to save the tag created and open another
empty New Tag dialog box.
• Create and Keep Open to save the tag created and keep the dialog
box open with the values still showing.

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12. To configure or change the following sequence parameter attributes,
go to the Tag Editor:
• Sequencing flag
• Data Type
• Description
• External Access
• Connections
For each sequence parameter, the Description and Connections may
be configured for Value, Valid, and Initial Value.
13. To configure or change the following sequence parameter attributes,
go to the Sequence Tag Editor:
• Value
• Initial Value
• Expression (only available on sequence output parameters)
• Description
Tip: The following boxes in the New Parameter and Tag dialog box are not
configurable, because they do not apply to sequence parameters:
• Base Tag
• Alias
• Style
• Constant

See also
Example: Construct an Equipment Sequence diagram on page 41

Create a selective branch A selective branching structure is a conditional (OR) type of branch with two
or more alternate parallel paths where only one path is selected for execution.

Selective branch requirements

Following is a summary of requirements for creating paths and connecting
elements in a selective branch.
• A selective divergence must be connected to a preceding step before
connecting transitions to create separate execution paths in the
branch.
• Each execution path in a selective branch must start with a transition.
• Each execution path in a selective branch must end with a transition
before connecting a selective convergence and merging the paths.
• A selective convergence must be followed by a step.

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Chapter 4 Overview of Equipment Sequence Editor

To create a selective divergence:

1. On the Equipment Sequence Element toolbar, select Add Selective
Divergence .
2. Connect the divergence to a preceding step.
3. Add execution paths to the divergence:
• Add and connect a transition to the divergence to create a separate
execution path.
• Repeat to create additional execution paths as needed.
4. Add and connect additional steps and transitions to each execution
path as needed.
5. Verify each execution path ends with a transition.

To create a selective convergence:

1. On the Equipment Sequence Element toolbar, select Add Selective
Convergence .
2. Connect the convergence to a following step.
3. Merge all paths of the convergence by connecting each path's final
transition to the convergence.

See also
Selective topology on page 25

Merge the selective branch Merge the selective branch in an Equipment Sequence diagram using this
procedure.

To merge the selective branch:

1. Select the branch in the Sequence Editor workspace or select on an
element to connect to in the sequence diagram.
2. Select Add Selective Convergence on the Sequence Element
toolbar.
3. Connect the convergence to a step in the sequence diagram.
4. Connect the last transition in each divergent path to the selective
convergence.

See also
Selective topology on page 25
Sequence branch and loop structures on page 22

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Example: Construct an Following is an example of how to create an Equipment Sequence diagram. In

this example, the Equipment Sequence adds material, mixes material, and
Equipment Sequence empties the mixer by doing the following:
diagram • Prepares for mixing by adding 25% of Material_A from Tank 1 at 500
gallons per minute.
• Adds and mixes material through three different execution paths,
simultaneously:
• Finishes adding Material_A from Tank 1 at 25 gallons per minute,
using a transfer of control.
• Adds Material_B from Tank 2 or Tank 3, using a selective
divergence.
• Mixes Material_A with Material_B.
• Empties the mixer after all materials are added and the mixing is
complete.
In the following example, an Equipment Sequence diagram is constructed to
add material quickly from a tank, then simultaneously continues to add
material and mix material, then empties the mix.

To construct this example of an Equipment Sequence diagram:

1. Prepare the Equipment Sequence diagram.
2. Prepare for mixing.
3. Configure simultaneous branches to add and mix material.
4. Converge the simultaneously executed paths.
5. Empty the tank after materials are added and mixed.
6. Finish the Equipment Sequence diagram.

See also
Construct an Equipment Sequence diagram with a selective topology
on page 46
Construct an equipment sequence diagram with a simultaneous
topology on page 47
Construct an Equipment Sequence diagram with a simple series
topology on page 48

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Chapter 4 Overview of Equipment Sequence Editor

Prepare the Equipment Prepare the Equipment Sequence diagram.

Sequence diagram
To prepare the Equipment Sequence diagram:
1. In the Equipment Sequence that was created, delete the link between
Tran_000 and the end step .
2. Move the end step above the transition, so you can find it later.
3. Create sequence input parameters to specify how much Material_A
and Material_B are to be added in later steps.

4. To prepare for mixing, configure the step and transition to begin

adding Material_A.

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See also
Configure simultaneous branches to add and mix material on page 43
Converge the simultaneously executed paths on page 44

Configure simultaneous Use simultaneous and selective branches to add and mix material.

branches to add and mix

material To configure simultaneous branches to add and mix material:
1. On the Equipment Sequence toolbar, click Add Simultaneous
divergence with elements branch to add the ingredients and mix the
ingredients. This adds two out of the three required steps, so you
must add a disconnected step and link it to the simultaneous
divergence branch.
This creates three simultaneous paths: one to add Material_A, one to
add Material_B, and one to mix the ingredients.

2. For each step, rename the default step name and then select the
Equipment Phase.

The Equipment Sequence must choose to add Material_B from either

Tank 2 or Tank 3.
3. Add a selective divergence to choose between two paths.

The transition expressions test a tag to determine which path to use

and run the correct Equipment Phase. The tank to be used is a
sequence input parameter, Add_B_From_Tank. The value 2 means
add material from Tank 2 and the value 3 means to add material from

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Chapter 4 Overview of Equipment Sequence Editor
Tank 3. The sequence input parameter is created and configured in a
later step.

4. Add the selective convergence branch to bring the two separate tank
paths back together.

See also
Converge the simultaneously executed paths on page 44

Converge the Converge simultaneously executed paths.

simultaneously executed
paths To converge the simultaneously executed paths:
1. Add a step underneath the selective convergence so all three paths can
be merged back together. The simultaneous convergence branch
requires all preceding branches to end in steps.

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 Chapter 4 Overview of Equipment Sequence Editor
2. After adding and configuring the additional step, add the
simultaneous convergence branch.

3. Now that the three separate paths are merged back together with
materials added and mixed, empty the tank and dump the mixture by
adding and configuring a disconnected transition and a step and
transition pair.

4. To finish the Equipment Sequence diagram, move the end step below
the Empty_Mixer_1 step. Then automatically align the sequence
elements in the diagram so that the layout is less cluttered and clearly
visible.

See also
Example: Construct an Equipment Sequence diagram on page 41

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Chapter 4 Overview of Equipment Sequence Editor

Construct an Equipment In this example, construct an Equipment Sequence diagram that uses a
selective topology.
Sequence diagram with a
selective topology
Before you begin:
• Go offline with the controller.
• Create any Equipment Phases needed for the Equipment Sequence.
• Define a new Equipment Sequence.
• Configure the Equipment Sequence properties.

To construct a selective topology Equipment Sequence diagram:

1. Select the Sequence Editor workspace.
2. On the Equipment Sequence Element toolbar, select Add Step and
Transition Pair .
3. Select the connector of the first element to create a link, and then
select the connector of the second element to attach the link.
Tip: When selecting the initial step link before adding the step and transition
pair, the link automatically connects to the pair.
4. Continue to Add Step and Transition Pair elements as needed.
5. Assign a name and a phase to each step.
6. Create transition expressions between each step.
7. On the Equipment Sequence Element toolbar, select Add Selective
Divergence .
8. Connect the divergence to a preceding step.
9. Add execution paths to the divergence:
• Add and connect a transition to the divergence to create a separate
execution path.
• Repeat to create additional execution paths as needed.
10. Add and connect additional steps and transitions to each execution
path as needed.
11. Verify each execution path ends with a transition.
12. On the Equipment Sequence Element toolbar, select Add Selective
Convergence .
13. Connect the convergence to a following step.
14. Merge all paths of the convergence by connecting each path's final
transition to the convergence.
15. Continue adding steps and transitions as needed.

16. Connect to the end step .

17. Verify the routine:

a. On the Standard toolbar select .

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 Chapter 4 Overview of Equipment Sequence Editor
b. Errors are listed in the Output window on the Errors tab at the
bottom of the application.

See also
Selective branch overview on page 24

Construct an Equipment In this example, construct an Equipment Sequence diagram that uses a
simultaneous topology.
Sequence diagram with a
simultaneous topology
Before you begin
• Go offline with the controller.
• Create any Equipment Phases needed for the Equipment Sequence.
• Define a new Equipment Sequence.
• Configure the Equipment Sequence properties.

To construct an Equipment Sequence diagram with a simultaneous

topology:
1. Select the Sequence Editor workspace.
2. On the Equipment Sequence Element toolbar, select Add Step and
Transition Pair .
3. Select the connector of the first element to create a link, and then
select the connector of the second element to attach the link.
4. Continue to Add Step and Transition Pair elements as needed.
5. Assign a name and a phase to each step.
6. Create transition expressions between each step.
7. On the Equipment Sequence Element toolbar, select Add
Simultaneous Divergence .
8. Link the divergence to a preceding transition.
9. Add execution paths to the divergence:
• Add and connect a step or a step and transition pair to the
divergence to create a separate execution path.
• Repeat to create additional execution paths as needed.
10. Add and connect additional steps and transitions to each execution
path as needed.
11. Verify each execution path ends with a step.
12. On the Equipment Sequence Element toolbar, select Add
Simultaneous Convergence .
13. Connect the convergence to a following transition.

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Chapter 4 Overview of Equipment Sequence Editor
14. Merge the paths of the simultaneous divergence by linking the final
step of each path to the convergence.
15. Continue adding steps and transitions as needed.

16. Connect to the end step .

17. Verify the routine:

a. On the Standard toolbar select .

b. Errors are listed in the Output window on the Errors tab at the
bottom of the application.

See also
Simultaneous branch overview on page 27

Construct an Equipment This example shows how to create, construct, and configure an Equipment
Sequence diagram that uses a series topology.
Sequence diagram with a
simple series topology
Before you begin:
• Go offline with the controller.
• Create any Equipment Phases needed for the Equipment Sequence.
• Define a new Equipment Sequence.
• Configure the Equipment Sequence properties.

To construct an Equipment Sequence diagram with a simple series

topology:
1. Click the Sequence Editor workspace.
2. On the Equipment Sequence Element toolbar, select Add Step and
Transition Pair .
3. Select the connector of the first element to create a link, and then
select the connector of the second element to attach the link.
Tip: Select the initial step link before adding the step and transition pair and
the link automatically connects to the pair.
4. Continue to Add Step and Transition Pair elements as needed.
5. Assign a name and a phase to each step.
6. Create transition expressions between each step.
7. Continue adding steps and transitions as needed.

8. Connect to the end step .

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9. Verify the routine:

a. In the Standard toolbar, select .

b. Errors are listed in the Output window on the Errors tab at the
bottom of the application.

See also
Series topology on page 22

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 Chapter 5

Sequence Execution & Monitoring

Sequence execution is responsible for coordinating:

• The execution of phases in the order specified by the sequence
diagram.
• The transition expressions to specify when steps are attached to
phases, started, stopped, reset, and attached.
• The step activation to trigger passing Equipment Sequence input data
to the Equipment Phase.
• The COMPLETE, STOPPED, or ABORTED triggers passing output data
from the Equipment Phase to the Equipment Sequence.
• Generating events to record changes in status and operator
interactions.
Equipment Sequence programs are IDLE until they are started. Resetting an
Equipment Sequence returns them to an IDLE state. Sequence parameters
and step tags can be initialized manually or configured as a sequence
property.
Monitoring is performed from the Logix Designer application and the
SequenceManager Controls. The Equipment Sequence Monitor is the
equivalent of the Sequence Detail Control and the Sequence Parameter
Control. The rendering of status is the same. Command interactions are the
same with the exception of ownership; the Logix Designer application
overrides ownership of the Equipment Sequence and the SequenceManager
Controls request ownership.

Equipment Sequence Open the Equipment Sequence Monitor by opening an Equipment Sequence
diagram from the Controller Organizer or Logical Organizer, and going on
Monitor line with the controller. The Equipment Sequence Monitor is the routine
window.
The Equipment Sequence Monitor is the online version of the Equipment
Sequence Editor and is used to monitor and interact with Equipment
Sequences that have been downloaded to the controller. The control engineer
can do the following:
• Command the Equipment Sequence.
• Change the value of parameters and attributes.
• Interact with the executing sequence.

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Chapter 5 Sequence Execution & Monitoring

See also
SequenceManager and related components overview on page 13
Equipment Sequence Editor on page 17

Sequence Tag Monitor Open the Sequence Tag Monitor by opening an Equipment Sequence
diagram from the Controller Organizer or Logical Organizer, and going on
line with the controller. The Sequence Tag Monitor is the grid in the bottom
of the diagram.
Use the Sequence Tag Monitor to view and edit sequence parameters and
assign step tag values while the controller is online. All sequence parameters
and step tags are listed in a table format.
The attributes that can be edited in the Sequence Tag Monitor are: Value,
InitialValue, and Description, based on the tag's External Access
configuration. In the Sequence Tag Monitor, parameter expressions can be
enabled, disabled, or forced to evaluate.

See also
Sequence Execution & Monitoring on page 51

Step states in an Equipment When a step is not active, the step state is inactive. When a step is active, and
attached to an Equipment Phase, the step state mirrors the state of the
Sequence Equipment Phase. The step state is also represented by the color of the step.
Steps with a Do Nothing phase only have two displayed step states: RUNNING
and IDLE.
Step States Description
ABORTING ABORTING means the Equipment Phase's ABORTING routine is executing.
ABORTED ABORTED means the Equipment Phase's ABORTING routine is finished.
HOLDING HOLDING means the Equipment Phase's HOLDING routine is executing.
HELD HELD means the Equipment Phase's HOLDING routine is finished.
RESETTING RESETTING means the RESETTING logic is executing.
RESTARTING RESTARTING means the RESTARTING routine is executing.
RUNNING RUNNING means the RUNNING routine is executing.
STOPPING STOPPING means the STOPPING routine is executing.
STOPPED STOPPED means the STOPPING routine is finished.
COMPLETE COMPLETE means the RUNNING routine is finished.
IDLE IDLE means the step is active and attached to the associated Equipment Phase, but the
Equipment Phase is not executing a routine.
INACTIVE INACTIVE means that the step is not active and is not attached to its associated Equipment
Phase.

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Step execution in a loop The looping structure is based on placing a selective convergence branch
above a selective divergence branch in an Equipment Sequence. The sequence
sequence of steps in a loop continue to execute until the branch transition out of the
loop is TRUE and the transition to continue in the loop is FALSE. In the
selective divergence branch, one transition creates the entrance into the loop
and another transition creates the loop exit path.

Step execution in a loop

The following table describes how and when steps in a loop sequence execute -
the active step is shaded in gray. This sequence execution example uses a
simple sequence with one loop.

Active step Sequence example Description

Initial step When the sequence is commanded to start, the initial step becomes active.

Step A After Transition 0 becomes TRUE, the initial step is STOPPED, RESET, and deactivated. Control is
passed to Step A, which is made active and is STARTED. Transition 0 becomes inactive and
Transition 1 becomes active.

Step B After Transition 1 becomes TRUE, Step A is STOPPED, RESET, and deactivated. Control is passed to
Step B, which is made active and is STARTED. Transition 1 becomes inactive and Transition 4 and
Transition 2 become active.

Step C After Transition 2 becomes TRUE first, Step B is STOPPED, RESET, and deactivated. Control is
passed to Step C, which is made active and is STARTED. Transition 4 and Transition 2 become
inactive, and Transition 3 becomes active.

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Active step Sequence example Description
Step B After Transition 3 becomes TRUE, Step C is STOPPED, RESET, and deactivated. Control is passed to
Step B, which is made active and is STARTED. Transition 4 and Transition 2 are made active and
Transition 3 becomes inactive.

Step D After Transition 4 becomes TRUE first, Step B is STOPPED, RESET, and deactivated. Control is
passed to Step D, which is made active and is STARTED. Transition 5 is made active, and Transition
4 and Transition 2 are deactivated.

End step After Transition 5 becomes TRUE, Step D is STOPPED, RESET, and deactivated. Control is passed to
the end step, which is activated. The end step immediately becomes COMPLETE. This indicates that
the entire sequence is COMPLETE.

See also
Loop topology on page 31

Step execution in an Each step in an Equipment Sequence diagram represents a specific action.
Step types include initial steps, Equipment Sequence steps, No phase steps,
Equipment Sequence and end steps.
Each step executes differently.

Initial step
The initial step is activated when the Equipment Sequence starts execution
and immediately becomes COMPLETE. The initial step may be activated or
deactivated with an change active step command.

Equipment Sequence step execution

The Equipment Sequence step automatically loads step input tag values into
the phase input parameters when the Equipment Sequence attaches to the
step, depending on configuration of the Equipment Phase. The step

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commands the Equipment Phase to start and shows status changes of the
Equipment Phase in the status of the step. The step automatically copies
phase output parameter values into step output tags when the equipment
phase becomes COMPLETE, STOPPED, or ABORTED, depending on
configuration of the Equipment Phase.

No phase step
The step immediately becomes COMPLETE when executed.

End step
The end step is activated when the preceding transition starts it and
immediately becomes COMPLETE. The end step may be activated or
deactivated with an active step change command.

See also
Step execution in a loop sequence on page 53
Step execution in a selective sequence on page 55
Step execution in a simultaneous sequence on page 57
Change active steps in an Equipment Sequence on page 59
Equipment Phase Properties - Configuration tab fields on page 61

Step execution in a In a selective branch, only the step in the path or branch under the first
transition to evaluate as TRUE is executed. Other paths or branches are
selective sequence ignored. Sequence execution continues in the selected path until that path's
final transition.

Step execution in a selective branch

The following table describes how and when steps in a selective sequence
execute - the active step is shaded in gray. This sequence execution example
uses a simple step (A-F) sequence with one selective branch.

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Active step Sequence example Description
Initial step When the sequence is commanded to START, the initial step becomes active.

Step A After Transition 0 becomes TRUE, the initial step is STOPPED, RESET, and deactivated. Control is
passed to Step A, which is made active and is STARTED. Transition 0 becomes inactive and
Transition 1 becomes active.

Step B After Transition 1 becomes TRUE, Step A is STOPPED, RESET, and deactivated. Control is passed to
Step B, which is made active and is STARTED. Transition 1 becomes inactive and both Transition 2
and Transition 4 become active.

Step C If Transition 2 becomes TRUE first, Transition 4 is deactivated. Step B is STOPPED, RESET, and
deactivated. Control is passed to Step C, which is made active and is STARTED. Transition 2
becomes inactive, and Transition 3 becomes active.

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Active step Sequence example Description
Step E After Transition 3 becomes TRUE, Step C is STOPPED, RESET, and deactivated. Control is passed to
Step E, which is made active and is STARTED. Transition 6 is made active, and Transition 3 is
deactivated.

Step F After Transition 6 becomes TRUE, Step E is STOPPED, RESET, and deactivated. Control is passed to
Step F, which is made active and is STARTED. Transition 7 is made active, and Transition 6 is
deactivated.

End step After Transition 7 becomes TRUE, Step F is STOPPED, RESET, and deactivated. Control is passed to
the end step, which is activated. The end step immediately becomes COMPLETE. This indicates that
the entire sequence is COMPLETE.

See also
Selective branch overview on page 24
Selective topology on page 25
Construct an Equipment Sequence diagram with a selective topology
on page 46

Step execution in a In a simultaneous branch, the steps immediately following a simultaneous

divergence branch start execution together. Step execution continues in all
simultaneous sequence paths until the transition following the simultaneous convergence evaluates
as TRUE. To execute across the simultaneous convergence branch, all steps
immediately preceding the convergence must be active and the transition

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(Transition 3 in the example) immediately following the convergence must
evaluate as TRUE.

Step execution in a simultaneous branch

The following table describes how and when steps in a simultaneous sequence
execute - the active step is shaded in gray. This sequence execution example
uses a simple five step (A-E) sequence with one simultaneous branch.
Active step Sequence example Description
Initial step When the sequence is commanded to START, this step becomes active.

Step A After Transition 0 becomes TRUE, the initial step is STOPPED, RESET, and deactivated. Control is
passed to Step A, which is made active and is STARTED. Transition 0 becomes inactive and
Transition 1 becomes active.

Step B & After Transition 1 becomes TRUE, Step A is STOPPED, if it is still RUNNING, RESET and deactivated.
Step C Steps B and C become active and are STARTED at the same time. Transition 1 becomes inactive and
Transition 2 becomes active.

Step C & After Transition 2 becomes TRUE, Step B is STOPPED, RESET, and deactivated. Step D is activated
Step D and STARTED. Step C remains active. Transition 2 becomes inactive and Transition 3 becomes
active, because all the steps immediately preceding the transition are active.

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Active step Sequence example Description
Step E Steps C and D are active, so Transition 3 evaluates its expression. After Transition 3 becomes
TRUE, Steps C and D are STOPPED, RESET, and deactivated and Step E is activated and STARTED.
Transition 3 becomes inactive and Transition 4 becomes active.

End step After Transition 4 becomes TRUE, Step E is STOPPED, RESET, and deactivated. The end step is
activated and STARTED. The end step immediately becomes COMPLETE. This indicates that the
entire sequence is COMPLETE. Transition 4 becomes inactive.

See also
Simultaneous branch overview on page 27
Simultaneous topology on page 29
Construct an Equipment Sequence diagram with a simultaneous
topology on page 47

Change active steps in an The Change Active Step command is a way to change the set of active
elements within an executing sequence. The sequence must be in Manual
Equipment Sequence mode so transitions will not fire and change the set of steps that are active.

Before you begin:

• Go online with the controller.
• In the Sequence Editor, open an Equipment Sequence.

To change the active step in an Equipment Sequence:

1. Select Take Ownership to take ownership of the Equipment
Sequence.
2. (optional) Start the Equipment Sequence.
3. Select to go into Manual mode.

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4. Inactivate the active step by selecting the step, and use the STOP or
ABORT command.
5. Once the step is STOPPED or ABORTED, use the RESET command to
put the step into the IDLE state.
6. Once the step is in the IDLE state, place it on the Steps to deactivate
list using one of these methods:
• Select Add and select the step's check box.
• Select the step, invoke the menu with a right click, then select
Change Active Step > Add to deactivate list.
7. Add a step to the Steps to activate list using one of the following
methods.
• Select Add and check the step's check box.
• Select the step, invoke the context menu with a right click, then
select Change Active Step > Add to activate list.
8. Select Apply to commit the change to active steps. The steps to become
deactivated become INACTIVE, and the steps to be activated become
IDLE.

9. Select the icon to go back to Automatic mode.

10. Select the icon to start the Equipment Sequence.

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Equipment Phase Use the Configuration tab of the Equipment Phase Properties dialog box to
create or modify the execution of the Equipment Phase. These options are
Properties - Configuration available in the Configuration tab.
tab fields

Name Purpose
Prestate Defines the prestate routine executed prior to the execution of any of the other state
routines.
Prestate routines are optional routines to perform some failure detection, verify that all
control modules are in the correct state, or execute other logic common to all state
routines. When the equipment phase is in a state with no associated state routine (for
example, IDLE, HELD, STOPPED), the Prestate routine continues to execute, but no state
routine executes.
Fault Defines the fault routine executed by the equipment phase whenever a major fault occurs
within the equipment phase.
Inhibit equipment phase Prevents the controller from executing this Equipment Phase. Clear the check box and the
controller executes the Equipment Phase. The check box is clear by default.

Synchronize redundancy data after execution Synchronizes data with the controller at the end of the phase execution. The check box is
not shown for controllers that do not support redundancy. The check box is always
enabled for controllers with redundancy enabled as long as the controller is not in Hard
Run mode. The check box is disabled when redundancy is not enabled.

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Name Purpose
Initial state The initial state can be:
• ABORTED
• COMPLETE
• IDLE
• STOPPED
Tip: Equipment Phases must be configured to have an Initial state of IDLE to
work with Equipment Sequences.
Complete state immediately if not implemented or empty Use this check box to signal the completion of a state any time the equipment phase
transitions to a state where the state routine is not implemented.
Initial step index Defines the initial value for the step index.
External sequencer loss of communication command Defines the command to invoke if communication with an external sequencer that is
currently an owner of the equipment phase fails.
• <none>
• ABORT
• HOLD
• STOP
External request hold action Defines the action to take when an external request initiated using the Equipment Phase
External Request (PXRQ) instruction is in progress and the equipment phase receives a
HOLD command while in the RUNNING state. Choose from:
• <none>
• Clear. Aborts all external requests that are in progress.
Value assignment in an equipment sequence Use the Value assignment in an equipment sequence to assign values for phase inputs
and output in an Equipment Sequence based on the value of step input and outputs.
• Automatically assign the value of step inputs to phase inputs check box. When
selected, all phase inputs use the value of the related step input.
• Automatically assign the value of phase outputs to step outputs when the phase
is: checkbox. When an Equipment Sequence is in the selected phase, it uses the value
of the related step output to evaluate the phase.
• COMPLETE
• STOPPED
• ABORTED

See also
Equipment Phase Properties dialog box - Configuration tab
Configure Equipment Phase properties
Create a Routine

Transition display states Transition display states show how the transition execution relates to the
overall Equipment Sequence execution.
Transition Display Transition Color Description
State
IDLE GRAY The transition is not actively executing.
ARMED GREEN The transition is actively evaluating its expression.
FIRING GREEN The transition expression has evaluated TRUE. The previous
steps is STOPPED and the next steps is started.
STOPPED BLUE The transition has completed processing a STOP command and
has stopped the transition's execution.

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Transition Display Transition Color Description
State
ABORTED PURPLE A Equipment Sequence transition in the ABORTED state has
been disabled by an ABORT command and will not advance an
Equipment Sequence chart.
HELD YELLOW/BROWN An Equipment Sequence transition in the HELD state has been
halted by a HOLD command or HELD because of an Equipment
Sequence failure and will not initiate or advance the Equipment
Sequence transition firing process until issued a RESTART
command. If the transition has been HELD due to an Equipment
Sequence failure, the failure should be cleared before issuing a
RESTART command.
HOLDING YELLOW/BROWN An Equipment Sequence transition in the HOLDING state is
advancing the Equipment Sequence transition firing process.
This transitional state is only visible until the scan processing
the HOLD command has finished.

See also
Transition firing states on page 63

Transition firing states The firing attribute is a subset of the FIRING state and gives a visual
indication of the current state.
This firing attribute is visible when the transition expression has evaluated
TRUE. The firing process requires several interactions with different phases
and is an asynchronous process. Some phases may have programs that can
take a long time to finish running (stopping a motor for example), so the
firing object shows what the transition is doing. The displayed Firing
Attribute values are: COMMITTED, STOPPING, RESETTING, PENDING, and
PAUSED.
Firing Attribute Description
ACQUIRING The Equipment Sequence is acquiring the right to command the Equipment Phase. For every step that follows the transition, the
Equipment Sequence must attach to each associated Equipment Phase before the steps can be activated.
COMMITTED The transition is committed to firing because the transition expression has evaluated TRUE, but the transition cannot activate
the following steps because it is in Manual mode or the Equipment Sequence is in the PAUSED substate.
STOPPING As part of firing, the Equipment Sequence commands all the active preceding steps to stop. The transition firing state is
STOPPING until all commanded steps are STOPPED.
RESETTING As part of firing, the Equipment Sequence commands all the preceding steps that are STOPPED to RESET. The transition firing
state is RESETTING until all the commanded steps are IDLE.
PENDING The transition is not able to fire because the Equipment Phases of the steps above or below the transition are not in the correct
state to permit the transfer of control function.
PAUSED The transition is committed to fire, but cannot because the Equipment Sequence has been PAUSED. The transition is waiting for
a RESUME command.
POST SCANNING The transition is at the end of the firing process. On the next scan of the Equipment Sequence chart, the transition advances the
chart.

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See also
Transition display states on page 62

Transition execution When a transition is activated, it evaluates its expression. If the expression is
TRUE, it stops all the preceding steps that are active, resets and detaches from
all the preceding steps, and attaches to the following steps. Once it attaches to
the following steps, it starts those steps.

See also
Overview of step states in an Equipment Sequence on page 52
Overview of transition display states on page 62
Overview of transition firing states on page 63

Quality of Data Quality of Data is the concept that a sequencing parameter or step tag can
have a value that is not known to be correct. There are three cases:
• Step output tag has not been updated yet. There are three ways the
update can occur.
• When the Equipment Phase has not requested loading a value to the
step output tag (PXRQ instruction).
• The Equipment Phase has not run to a COMPLETE, STOPPED, or
ABORTED state for a configured automatic update to occur.
• The step output has read/write external access (inherited from the
Equipment Phase output parameter) and the operator assigns a
value.
• Sequence output parameter has not been updated yet. There are three
ways the update can occur.
• The sequence enters the COMPLETE, STOPPED, or ABORTED state,
causing the sequencing parameter's expression to evaluate.
• The operator commands the parameter expression to evaluate.
• The output has read/write external access and the operator assigns a
value.
• An expression contains a tag with an invalid quality of data.
• Step input tags and sequencing output parameters can have a
configured expression that may reference a sequencing parameter
or step tag whose Valid member is FALSE.
If your application needs to discern data integrity, use the Quality of Data to
test the validity of sequencing parameter data.
These system provided data types implement the Quality of Data concept:

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• Valid – Specifies the validity of the contents of the sequencing
parameter or step tag’s Value member field as a BOOL: 1 = Valid and
0 = Invalid. When the Valid attribute is 1, then the Value member of
the parameter or sequence is known to be correct. When it is 0, the
Value member is not known to be correct. If the Value is known not to
be valid, the invalid symbol is shown in the box.
• InitializeAsValid - When an Equipment Sequence is initialized, the
Valid attribute is set to the value of the InitializeAsValid attribute.
The Valid attribute is the quality of data of the sequencing input parameter.
Because these parameters may not have expressions, the Valid attribute is
always TRUE.

See also
How sequence output parameter and step input tag expressions
evaluate on page 66
How sequence parameters update on page 65

How sequence parameters

update Sequence input parameters
Sequence input parameters update by executing a configured Connection,
performed by the firmware every scan. Then by directly assigning a value
using Logix Designer or the Sequence Parameter Control, depending on the
configured External Access value. Then a sequence’s tags are initialized by
moving the Initial Value attribute value into the Value attribute, by using
either the START or RESET command in Logix Designer or the Initialize
Parameters command in Logix Designer or the Sequence Parameter
Control.

Sequence Output Parameters update

Sequence output parameters update by directly assigning a value using Logix
Designer or the Sequence Parameter Control, depending on the configured
External Access value. Then a sequence’s tags are initialized by moving the
Initial Value attribute value into the Value attribute, by using either the
START or RESET command in Logix Designer or the Initialize Parameters
command in Logix Designer or the Sequence Parameter Control. The
associated Equipment Phase output parameter value is loaded when the phase
is configured to update to the state to change to a terminal state (COMPLETE,
STOPPED, or ABORTED). The sequence output parameter’s expression must
be enabled to update the Value attribute after evaluation.

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How sequence output Step tag input expressions evaluate at the beginning of each scan, sequence
output parameter expressions evaluate when the sequence enters a terminal
parameter and step input (STOPPED, ABORTED, COMPLETE) state. Step tag input expression and
tag expressions evaluate sequence output parameter expressions can be commanded to evaluate using
the Force Expression Evaluation command.

How step tags update

Step input tags
Step input tags update by directly assigning a value using Logix Designer or
the Sequence Parameter Control, depending on the configured External
Access value. Then a sequence’s tags are initialized by moving the Initial
Value attribute value into the Value attribute, by using either the START or
RESET command in Logix Designer or the Initialize Parameters command
in Logix Designer or the Sequence Parameter Control. The configured
parameter expression is evaluated on each scan. The step input tag’s
expression must be enabled for evaluation to update the Value attribute.

Step output tags

Step output tags update by directly assigning a value using Logix Designer or
the Sequence Parameter Control, depending on the configured External
Access value. Then a sequence’s tags are initialized by moving the Initial
Value attribute value into the Value attribute, by using either the START or
RESET command in Logix Designer or the Initialize Parameters command
in Logix Designer or the Sequence Parameter Control. Then the associated
Equipment Phase output parameter value is loaded when one of the following
occurs:
• The phase is configured to update the state to change to a terminal
state (COMPLETE, STOPPED, or ABORTED)
• The scanning Equipment Phase routine executes a Equipment Phase
External Request (PXRQ) instruction requesting the output parameter
value be copied to the step output tag.

See also
Sequence Parameters Control on page 93

Pause, auto pause, and Use the Pause and Auto Pause buttons to test and troubleshoot Equipment
Sequence or Equipment Sequence step execution.
resume commands
The Pause and Auto Pause button commands:

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• The Equipment Sequence to pause execution of the sequence when
active transition expressions evaluate TRUE.
• The Equipment Sequence step and its associated phase to enable
pausing when a PPD instruction is executed.
When the Pause and Auto Pause buttons are toggled on, the button
background is a light blue with a dark blue outline.
The Resume button commands:
• The Equipment Sequence to resume execution of the sequence.
• The Equipment Sequence step and its associated phase to resume
execution.

See also
Change modes effect on sequence and step commands on page 70

Ownership Ownership is having the right to command an Equipment Sequence or an

Equipment Phase.
Both Equipment Sequences and Equipment Phases must be owned to be
commanded. The ownership commands are Attach (SATT) and Detach
(SDET).
Internal sequencers (programs), external sequencers (FactoryTalk Batch), and
operators always use an Attach instruction to command an Equipment
Sequence. Logix Designer always uses an Override (SOVR) instruction to
command an Equipment Sequence. A program might successfully attach an
Equipment Sequence but be unable to command it because Logix Designer
has overridden ownership.
The ownership override commands are:
• Attach: Operators, internal sequencers, and external sequencers
attach to an Equipment Sequence or Equipment Phase to control it.
• Override: A Logix Designer application always takes ownership of an
Equipment Sequence or Equipment Phase by overriding an existing
Attach.
• Detach: Operators, internal sequencers, external sequencers, and
Logix Designer Detach to release the right to control the Equipment
Sequence or Equipment Phase.
If the Equipment Sequence is attached by another sequencer, an external
sequencer, or an operator, an Override takes precedence without waiting for
other owners to release the Equipment Sequence. Any existing attachment
remains and resumes control once the Override is gone.

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If the Equipment Phase is attached by an Equipment Sequence, an Override
interrupts the Equipment Sequence's ability to coordinate the Equipment
Phase. This is a sequencing failure condition and the Equipment Sequence is
HELD.
Only one attachment is allowed on an Equipment Phase or Equipment
Sequence. If the Equipment Phase or Equipment Sequence is not already
attached to, attaching will grant the attaching sequencer ownership (and
commanding privilege). If the Equipment Phase or Equipment Sequence is
already attached to, then other potential owners trying to attach to the same
Equipment Phase or Equipment Sequence fail.

Ownership types
Ownership types are the ways a sequence or phase may be owned--enabling
the owner to command them. Each ownership type is stored independently on
the phase or sequence so one type of ownership does not remove another.
Relative Priority Ownership Type # Allowed Description
First Logix Designer Override Up to 15 Logix Designer application always takes
ownership by overriding all other potential
users. Up to 15 different Logix Designer
applications may attach to a single Equipment
Phase or Equipment Sequence at one time.
Second Attach 1 A request to attach fails if the Equipment
Sequence or Equipment Phase is already
attached.

Ownership user types

There are four user types: Logix Designer, External Sequencer, Internal
Sequencer, and Operator. The attachment type accompanies an attach request
to take ownership.
Types of users Description Examples
Logix Designer A control engineer using Logix Designer overrides Equipment Phase Monitor within Logix
ownership of the Equipment Phase or Equipment Designer
Sequence. Sequence Editor within Logix Designer
Internal Sequencer A program running within a ControlLogix controller. Programs, Equipment Sequences, Equipment
Phases
Operator An operator logged into a FactoryTalk View Site Edition Sequence Detail, Sequence Summary
display interacting with Equipment Sequence through
the SequenceManager Controls.
When an attachment of Operator type exists, all
operator displays may command the Equipment
Sequence.
External Sequencer An application outside ControlLogix that interacts with FactoryTalk Batch Server
sequenced objects.

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See also
Command a step or Equipment Phase using the Equipment Sequence
Monitor on page 69
Command a transition using the Equipment Sequence Monitor on
page 69

Command a step or Command an Equipment Phase through a step using the Equipment
Sequence Monitor.
Equipment Phase using the
Equipment Sequence
Before you begin:
Monitor
• Go online with the controller.
• In the Equipment Sequence Monitor, open an Equipment Sequence.
• The Equipment Sequence must be in Manual mode.
• The step to be commanded must be active. This implies the step is
attached to the Equipment Phase to be commanded. Select Active Step

Change to make a step active.

To command a step using the Equipment Sequence Monitor:

1. Select Take Ownership to take ownership of the Equipment
Sequence.
2. Select the active step to see the Equipment Sequence step command
toolbar.
3. Select a command to command the equipment phase associated with
the step.
4. (optional) Once commanding phases completed, select Exit Manual

to go back to Automatic mode.

5. When finished, select Release Ownership .

See also
Equipment Sequences and Equipment Sequence step commands on
page 32

Command a transition using You can force an active transition to evaluate TRUE, STOPPING and
RESETTING the preceding steps while attaching and STARTING the
the Equipment Sequence following steps.
Monitor
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Before you begin:

• Go online with the controller.
• In the Equipment Sequence Monitor, open an Equipment Sequence.
• The Equipment Sequence should be running.
• The transition must be active.
• The Equipment Sequence must be in Automatic mode.

To command a transition using the Equipment Sequence Monitor:

1. Select to take ownership of the Equipment Sequence.

2. Right click on the transition and select Force Expression to True.

See also
Overview of transition display states on page 62

Overview of transition firing states on page 63

Change modes effect on Use the change mode to toggle an Equipment Sequence between Automatic
and Manual mode.
sequence and step
commands
Mode effect on sequence commands
The following table shows the mode effect on sequence commands.
Command Automatic Mode Manual Mode
Start, Hold, Stop, Abort, Restart, Reset Allowed Ignored
Pause, Auto Pause, Resume Allowed Ignored
Clear Failures on a sequence Allowed Allowed
Force Transition Expression to Evaluate TRUE Allowed Ignored
Change Active Step Ignored Allowed

Mode effects on step commands

Commanding a step is the same as commanding the Equipment Phase, except
it is done through the sequence. The following table shows the mode effect on
step commands.
Command Automatic Mode Manual Mode
Start, Hold, Stop, Abort, Restart, Reset Ignored Allowed
Pause, Auto Pause, Resume Ignored Allowed
Clear Failures on a sequence Ignored Allowed
Force Transition Expression to Evaluate TRUE Allowed Allowed

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See also
Equipment Sequence failures on page 71

Equipment Sequence Failures originate from two sources, Equipment Phases and Equipment
Sequences. An Equipment Phase generates a failure by executing a Phase
failures Failure (PFL) instruction, maintained by the Failure attribute. The Equipment
Sequence generates a failure by detecting a problem that impairs its ability to
coordinate active sequence elements, maintained by the Internal Failure
attribute.
A failure propagates up the hierarchy of sequence elements from the point it
originated; Equipment Phases notify steps and steps notify the Equipment
Sequence. Failure status is maintained at each of these layers:
• The Equipment Phase backing tag has a Failure member.
• The step backing tag has a Failure member and an Internal Failure
member.
• The Equipment Sequence backing tag has a Failure member and an
Internal Failure member.
A failure is considered a serious problem that warrants holding the execution
of the sequence, all active elements, and any phases to which they are attached
until the cause of the failure is corrected. This can occur in either Automatic
or Manual mode.

Phase-generated failures
Phase-generated failures are the result of the phase logic executing a PFL
instruction. The instruction includes a failure code created and managed by
the user. The failure is stored on the Failure member of the phase’s backing
tag. The failure is detected by the step, setting the Failure member on the
step's backing tag. Finally, the failure on the step is detected by the sequence,
setting the Failure member on the sequence.

Sequence-generated failures
Sequence-generated failures are detected by the sequencing engine as it
executes. The failure is detected by the step and is stored on the Internal
Failure member of the step’s backing tag. That failure is detected by the step,
setting the Internal Failure member on its backing tag.

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Chapter 5 Sequence Execution & Monitoring

Clear failures
The Clear Failures command resets the failure and internal failure members
of the sequence and step backing tags. If a phase failure is being cleared, the
Clear Failures command is forwarded to the phase. Sequences, like phases,
cannot be restarted until all their failures are cleared. Note that if the cause of
the failure has not been resolved, the next scan of the Equipment Sequence
engine will likely regenerate the failure.
You need to do the following sequence of actions in order to recover from an
Equipment Sequence failure:
• Correct the cause of the failure.
• Clear the failure status from the sequence, step, and phase involved in
the failure.
• Restart the sequence.

See also
Change modes effect on sequence and step commands on page 70

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 Chapter 6

SequenceManager event handling applications

The event handling components are split between the controller and a
supporting PC. The sequence program, running in the firmware of the
controller, generates events. An external workstation hosts the
SequenceManager Event Client Service, which subscribes to
SequenceManager events and writes them to a raw event data file. The
SequenceManager Event Archiving Service converts the raw events data into
readable form, writes the data to an .EVT file, and populates tables in a
database for PlantPAx reporting.

SequenceManager Event Console

The Equipment Sequence Manager Event Services Console provides the user
interface for performing the following tasks:
• Start and stop the Equipment Sequence Manager Event Client Service
and the Equipment Sequence Manager Event Archiving Service.
• Display the status of Equipment Sequence Manager Event Client
Service and the Equipment Sequence Manager Event Archiving
Service.
• Configure the Equipment Sequence Manager Event Client Service
Settings and Sequence Manager Event Archiving Service Settings.

SequenceManager Event Client

The SequenceManager Event Client receives events from multiple controllers.
Each event received is written directly to a raw event file.

SequenceManager Event Archiving Service

SequenceManager Event Archiving Service is responsible for reading events
from the raw event file. Each event is translated and localized into readable
strings, then the data is stored into sequence specific event files (.EVT files).
Another option is for data to be stored into the BatchHistoryEx data table in
the SQL Server for PlantPAx event data handling.

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Chapter 6 SequenceManager event handling applications

See also
SequenceManager and related components overview on page 13

SequenceManager events SequenceManager events record status changes, processing actions, and user
interactions as the Equipment Sequence executes. These events have
importance at runtime because they indicate the current status of various
aspects of a manufacturing process and have historical importance because
the data is a record of exactly what transpired.
The three event types recorded by the SequenceManager are:
• Sequence Command Events record commands to change state, change
pause state, change sequence mode, change ownership, clear failures,
change active step, override transition expression, and enable and
disable sequence tag expressions.
• Process Data Update Events record the value of system values
updating, including the state, pause, mode, ownership, and failure.
• Parameter Update Events record changes in value or status of
sequence parameters and step tags, including operator updates to
parameters and step tag values, operators changing the status of
sequence parameter or step tag expressions, phase updates to step tag
values, and phase requests for step tag data.
Keep the following considerations in mind when using SequenceManager
events:
• Equipment Phases and Equipment Sequences should be run in a
periodic task.
• Equipment Sequence programs can be in the same periodic task as the
Equipment Phase programs, or in separate tasks.
• Generating events affects the performance of an Equipment Sequence.
Only generate events when records for executing the sequence are
required.
• Avoid generating more than 60 events and alarms combined per
second.
• Configure sets of sequence parameters and step tags to not exceed the
memory capacity of the controller.
• Equipment Phases can execute faster than an Equipment Sequence
can record events.
An Equipment Sequence coordinates Equipment Phases that run in
fractions of a second. But, the firmware event generation systems
cannot keep up. When it is important to reliably record events, it is
best that the phase takes at least 10 seconds to run to completion.
• When steps are started and completed, use automatic storing of input
and output data. A phase executing PXRQ instructions to read input or

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 Chapter 6 SequenceManager event handling applications
write outputs from or to an Equipment Sequence faster than every 10
seconds may lose events.
The benchmark of a fast Equipment Sequence program is tested as:
• 18 Steps with three parallel paths of simultaneous execution
• 225 Parameters
• Generating 334 events
• For a sequence running 60 seconds
• For an ES completing in approximately 60 seconds
With this phase and sequence configuration, events are not lost when
burst of alarms are processed.
The benchmark is primarily for testing how fast Equipment Sequence
can run without losing events. The execution speed of a sequence
depends upon the execution speed of the Equipment Phases. Phases
that complete their execution in less than 10 seconds may lose events
depending upon the number of alarms being generated.
• Equipment Phases can be configured to get Input Parameters when
they start and to store Output Parameters when they complete. This is
the most efficient way to move data between an Equipment Sequence>
and an Equipment Phase.
Important: When Generate Events is enabled, the Logix Designer application
checks that there is enough memory to generate the Sequence
Parameter and Step Tag value events. The checks occur when the
sequence program is verified, when a sequence program is
imported and exported as a component, and when the controller is
online and the sequence program’s Generate Events attribute is
enabled.
If the amount of memory required is not available, the sequence
does not verify, generates an import error, and the import is not
allowed or the Generate Events attribute is not enabled,
respectively.

See also
SequenceManager and related components overview on page 13

Configure Microsoft SQL Reporting within SequenceManager Events requires the setup of Reporting
Services.
Server for Reporting
Services for
To configure the Microsoft SQL Server for Reporting Services for
SequenceManager Events
SequenceManager Events:
1. Open Reporting Services Configuration Manager.
2. At the prompt, select Connect. The Reporting Services Configuration
Manager opens.
3. Select Report Manager URL.

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Chapter 6 SequenceManager event handling applications
4. Select the URLs link to open the Home - Report Manager page in a
web browser. If the link is not active, select Apply to activate the link.
If this is the first time the Report Manager page is accessed, warning
messages may appear. To continue, select Close for any warning.
5. On the Home - Report Manager page, select Folder Settings.
6. On the Security page, select New Role Assignment.
7. On the New Role Assignment page:
a. In the Group or user name box, enter the domain\user name that
was used when installing SQL Server.
b. Select the Role check box to select all of the roles.
c. Select OK.
The new role is added to the list on the SQL Server Security page.

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 Chapter 7

The SequenceManager Controls

The SequenceManager sequences a series of Equipment Phases to the Control

Logix platform. The operator views and interacts with the Equipment
Sequences downloaded to a Logix controller through three types of controls:
• Sequence Detail Control
The Sequence Detail Control provides the operator with a detailed
view of an Equipment Sequence, including its chart structure, steps,
and transitions. The runtime status of the sequence program and its
sequence elements are also shown. The operator can command the
Equipment Sequence from this control.
• Sequence Summary Control
The Sequence Summary Control displays the sequence program
status for each of the Equipment Sequences downloaded to the
controller. The Sequence Summary Control also allows the operator
to view and command a selected Equipment Sequence.
• Sequence Parameters Control
The Sequence Parameters Control displays a table of all sequencing
parameters and step tags of a specified Equipment Sequence, and
allows the operator to command a selected sequencing parameter or
step tag. To refine the display, configure the table to filter the
information displayed.

See also
Sequence Detail Control on page 85
Sequence Summary Control on page 79

Sequence Parameters Control on page 93

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 Chapter 8

Sequence Summary Control

Use the Sequence Summary Control to see status information for the
Equipment Sequences downloaded to a controller. You can select a sequence
in the list and command it.

To open the Sequence Summary Control:

1. On the Start menu, choose:
Rockwell Software > FactoryTalk View > FactoryTalk View Site Edition Client.
2. Click Sequence Summary Control.

See also
Command an Equipment Sequence using the Sequence Summary
controls on page 84
Sequence Summary command controls on page 81
Sequence Summary Control columns in table area on page 82
Settings and status in the Control footer on page 83
Configure the Sequence Control to communicate with a controller on
page 79

Configure the Sequence Configure the Sequence Summary Control to communicate with a controller
or to use VBA by customizing settings in the Property Panel for the control.
Summary Control There is also the option to customize display options.

Before you begin:

• Open the FactoryTalk View Site Edition (SE) application.
• Open a display that contains the Sequence Summary Control.

See also
Configure the Sequence Summary Control to communicate with a
controller on page 80

Configure the Sequence Summary Control display options on page 80

Configure the Sequence Summary Control to use VBA on page 81

Sequence Parameters Control on page 93

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Chapter 8 Sequence Summary Control
Sequence Parameters Control property settings on page 96

Configure the Sequence Configure the Sequence Summary Control to communicate with a controller.

Summary Control to
communicate with a To configure the Sequence Summary Control to communicate with a
controller controller:
1. In the display window, right click the Sequence Summary Control.
2. Select Property Panel.
3. Select Connections tab.
4. In the ControllerPath property text box, enter the path to the
controller.
For example: AB_ETH-1\99.99.99.99\Backplane\0
5. In the ControllerShortcut property text box, enter the RSLinx
Enterprise device shortcut name to the controller.
6. In the DataServerPath property text box, enter the FactoryTalk path to
the RSLinx Enterprise Data Server.
For example: RNA://$Local/MyProject/
7. In the SeqMgrServerPortNumber property text box, enter the port
number that was defined during the installation of the server.
8. Close the Property Panel window.
9. Select Save.

See also
Configure the Sequence Summary Control display options on page 80

Configure the Sequence Configure the Sequence Summary Control by customizing display options.

Summary Control display

options To configure the Sequence Summary Control display options:
1. Right click the Sequence Summary Control in the display window.
2. Select Property Panel.
3. Select display options.
• (optional) In the Column1Content property text box, select a
content option for the column.
• (optional) In the Column2Content property text box, select a
content option for the column.
• (optional) In the Column3Content property text box, select a
content option for the column.
• (optional) In the Column4Content property text box, select a
content option for the column.

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 Chapter 8 Sequence Summary Control
• (optional) In the Column5Content property text box, select a
content option for the column.
• (optional) In the Column6Content property text box, select a
content option for the column.
• (optional) In the Column7Content property text box, select a
content option for the column.
• (optional) In the CommandButtonLocation property text box,
choose the location.
• (optional) In the ShowCommandButtons property text box, select
True to display the command buttons.
• (optional) In the ShowStatusBar property text box, select True to
display the status bar.
• (optional) In the TouchPointerSize property text box, select an
option to auto-size, decrease, or increase the size of buttons.
4. Close the Property Panel window.
5. Click Save.

See also
Configure the Sequence Summary Control to communicate with a
controller on page 80
Configure the Sequence Summary Control to use VBA on page 81

Configure the Sequence Configure the Sequence Summary Control to use VBA.

Summary Control to use

VBA To configure the Sequence Summary Control to use VBA:
1. In the display window, right click the Sequence Summary Control.
2. Select Property Panel.
3. In the ExposeToVBA property text box, select VBA Control to allow
the Sequence Detail Control to use VBA for scripting.
4. Close the Property Panel window.
5. Click Save.

See also
Configure the Sequence Summary Control to communicate with a
controller on page 80

Configure the Sequence Summary Control display options on page 80

Sequence Summary Use the following commands to control an Equipment Sequence using the
Sequence Summary Control. The availability of some commands depends on
command controls the selected Equipment Sequence owner, state, mode, and failure status.
Click More to display all the commands on the toolbar.

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Chapter 8 Sequence Summary Control
Icon Command Description
Take Ownership Take ownership of the Equipment Sequence. Taking ownership means that this
application now has the right to command this Equipment Sequence; other internal
sequencers, external sequencers, and operators are not allowed to command this
sequence. The Logix Designer application can override ownership.
Release Ownership Release ownership of the Equipment Sequence. Releasing ownership makes the
sequence available to internal sequencers, external sequencers, and operators for
attachment.
Set ID Opens the Set Sequence ID dialog box where you can assign an identifier to the
Equipment Sequence. This command is enabled only when an Equipment Sequence is
idle.
Start Start execution of the Equipment Sequence.
Hold Halt all attached phases for the Equipment Sequence and stop evaluating transitions
until the Equipment Phase runs its HOLDING routine.
Restart Resume execution of the Equipment Sequence from the HELD state.
Stop Stop all attached phases and active transitions for the Equipment Sequence. Any
attached Equipment Phases run their STOPPING routines.
Abort Abort all attached phases and active transitions for the Equipment Sequence. Any
attached Equipment Phases run their ABORTING routines.
Reset Reset any remaining active phases for the Equipment Sequence.
Clear Failures Clear the failure flags on the Equipment Sequence.
Pause Pause execution of the Equipment Sequence. When the active transition evaluates TRUE,
it does not transition to the FIRING state until you click Resume. The Resume command
resets the Pause flag so the sequence will continue execution uninterrupted.
Auto-Pause Automatically pause the Equipment Sequence as transitions evaluate TRUE. The Resume
command resets the Pause flag. The Auto-Pause flag immediately causes the Pause
flag to be turned on again, so the sequence pauses when the next transition expression
evaluates TRUE.
Resume Continue execution of the Equipment Sequence.
Automatic Put the Equipment Sequence in Automatic mode, which allows the sequencing engine to
automatically fire transitions and execute the Equipment Sequence.
Manual Put the Equipment Sequence in Manual mode, in which the sequencing engine does not
automatically fire transitions, and an operator commands the Equipment Sequence step
by step. On the toolbar, only the Release Ownership, Pause, Auto-Pause, and
Automatic commands are enabled.

See also
Sequence Summary Control on page 79
Command an Equipment Sequence using the Sequence Summary
controls on page 84

Sequence Summary Control The following columns are displayed in the Equipment Sequence list in the
table area of the Sequence Summary Control. The list can be sorted in
columns in table area alphabetical order for any column to group Equipment Sequences based on
status.
Status column Description
Sequence Name The Equipment Sequence name.

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 Chapter 8 Sequence Summary Control
ID The identifier assigned to the Equipment Sequence before it runs. This field is
editable when the sequence is inactive, or in the IDLE state. When the sequence
is active, the ID field is locked.
State The current execution state of the Equipment Sequence. Possible states include
NOT CONNECTED, IDLE, RESTARTING, RUNNING, RESETTING, HOLDING, STOPPING,
ABORTING, HELD, STOPPED, ABORTED, and COMPLETE.
Mode The operational mode for the Equipment Sequence, either Automatic, in which
sequence steps advance automatically, or Manual, in which the operator
advances sequence steps manually.
Phase Failure Indicates a failure in an Equipment Phase associated with the sequence.
Sequence Failure Indicates a failure in the Equipment Sequence.
Owners The current owner of the Equipment Sequence.
Unit ID A numerical representation of the piece of equipment that the Equipment
Sequence is controlling.

See also
Sequence Summary Control on page 79

Settings and status in the The footer section on the Sequence Control contains the following settings
and status indicators.
Control footer
The communication, failure, and unscheduled/inhibited icons are also
displayed in the upper left corner of the diagram window, in the status bar,
and on any step or tag the status is detected.
Setting or status Description
Zoom control Adjusts the zoom on the control window.
Auto-Scroll Turn Auto-Scroll on or off.
Sequence name The name of the Equipment Sequence.
Status bar Displays the following status icons:

– There is a communication problem with the controller, the web server, the live data server,
or the tags.

– No known communication problem.

– There is a failure in the Equipment Sequence.

– No known failure in the Equipment Sequence.

– The controller is in Program, Remote Program, or an unknown mode.

– The controller is in Run, Remote Run, or an unknown mode.

– The Equipment Sequence or task is inhibited, or the Equipment Sequence is unscheduled.

– The Equipment Sequence is scanning, or the status is unknown.

See also
Sequence Summary Control on page 79
Sequence Parameters Control on page 93
Sequence Detail Control on page 85

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Chapter 8 Sequence Summary Control

Command an Equipment Use the commands on the Sequence Summary Control to send commands to
an Equipment Sequence.
Sequence using the
Sequence Summary Control
To command an Equipment Sequence using the Sequence Summary
controls:
1. Select an Equipment Sequence in the list.
2. Click Take Ownership .
3. Click the command buttons to command the Equipment Sequence.
4. When finished, click Release Ownership .

See also
Sequence Summary Control on page 79
Sequence Summary command controls on page 81

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 Chapter 9

Sequence Detail Control

Use the Sequence Detail Control to see a detailed view of an Equipment
Sequence, including its chart structure, steps, and transitions. You can also
view the runtime status of the Equipment Sequence and the sequence
elements.

To open the Sequence Detail Control:

1. On the Start menu, choose:
Rockwell Software > FactoryTalk View > FactoryTalk View Site Edition Client.
2. Click Sequence Detail Control.

See also
Overview of the Sequence Detail Control status header area on page 89
Monitor a transition in the Sequence Detail Control on page 92

Monitor a step in the Sequence Detail Control on page 90

Configure the Sequence Configure the Sequence Detail Control to communicate with a controller or
to use VBA by customizing settings in the Property Panel for the control.
Detail Control There is also the option to customize display options.

Before you begin:

• Open the FactoryTalk View SE application.
• Open a display that contains the Sequence Detail Control.

See also
Configure the Sequence Detail Control to communicate with a
controller on page 86
Configure the Sequence Detail Control display options on page 86

Configure the Sequence Detail Control to use VBA on page 87

Sequence Detail Control command controls on page 87

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Chapter 9 Sequence Detail Control

Configure the Sequence Configure the Sequence Detail Control to communicate with a controller.

Detail Control to
communicate with a To configure the Sequence Detail Control to communicate with a
controller controller:
1. In the display window, right click the Sequence Detail Control.
2. Select Property Panel.
3. In the ControllerPath property text box, enter the path for the
controller.
4. In the ControllerShortcut property text box, enter the RSLinx
Enterprise device shortcut name to the controller.
5. In the DataServerPath property text box, enter the FactoryTalk path to
the RSLinx Enterprise data server.
6. In the SequenceName property text box, enter the name of the
Equipment Sequence.
7. In the SeqMgrServerPortNumber property text box, enter the port
number that was defined during the installation of the server.
8. Close the Property Panel window.
9. Click Save.

See also
Configure the Sequence Detail Control display options on page 86
Configure the Sequence Detail Control to use VBA on page 87

Configure the Sequence Configure the Sequence Detail Control display options.

Detail Control display

options To configure the Sequence Detail Control display options:
1. In the display window, right click the Sequence Detail Control.
2. Select Property Panel.
3. (optional) In the AutoScroll property text box, select True.
4. (optional) In the CommandButtonLocation property text box, choose
the location for the Equipment Sequence command buttons.
5. (optional) In the ShowCommandButtons property text box, select
True to display the command buttons.
6. (optional) In the ShowStatusBar property text box, select True to
display the status bar.
7. (optional) In the TouchPointerSize property text box, select an option
to auto-size, decrease, or increase the size of buttons.
8. Close the Property Panel window.
9. Click Save.

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See also
Configure the Sequence Detail Control to communicate with a
controller on page 86

Configure the Sequence Detail Control to use VBA on page 87

Configure the Sequence Configure the Sequence Detail Control to use VBA.

Detail Control to use VBA

To configure the Sequence Detail Control to use VBA:
1. In the display window, right click the Sequence Detail Control.
2. Select Property Panel.
3. In the ExposeToVBA property text box, select VBA Control to allow
the Sequence Detail Control to use VBA for scripting.
4. Close the Property Panel window.
5. Click Save.

See also
Configure the Sequence Detail Control to communicate with a
controller on page 86
Configure the Sequence Detail Control display options on page 86

Sequence Detail Control Use the following commands to control an Equipment Sequence using the
Sequence Detail Control. The availability of some commands depends on the
command controls selected Equipment Sequence owner, state, mode, and failure status. Click
More to display all the commands on the toolbar.
The following commands are always displayed:
• Take/Release ownership
• Set ID
• Initialize parameters
• Start
• Hold
• Restart
• Stop
• Abort
• Reset
• More/Less
These commands are available after selecting the More button and can be
hidden by selecting the Less button:

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Chapter 9 Sequence Detail Control
• Clear Failures
• Pause/Cancel Pause
• Auto Pause/Cancel Auto Pause
• Resume
• Enter/Exit Manual
• Step change
• Force transition
Icon Command Description
Take Ownership Take ownership of the Equipment Sequence. Taking ownership means that this
application now has the right to command this Equipment Sequence; other internal
sequencers, external sequencers, and operators are not allowed to command this
sequence.
Release Ownership Release ownership of the Equipment Sequence. Releasing ownership means that internal
sequencers, external sequencers, and operators with attachments are allowed to
command this sequence.
Set ID Opens the Set Sequence ID dialog box where you can assign an identifier of up to 82
characters to the Equipment Sequence. This command is enabled only when an
Equipment Sequence is idle.
Start Start execution of the Equipment Sequence.
Hold Halt all connected phases for the Equipment Sequence and stop evaluating transitions
until the Equipment Phase runs its Hold routine.
Restart Resume execution of the Equipment Sequence from the HELD state.
Stop Stop all connected phases and active transitions for the Equipment Sequence.
Abort Abort all connected phases and active transitions for the Equipment Sequence.
Reset Reset any remaining active phases for the Equipment Sequence.
Clear Failures Clear the failure flags on the Equipment Sequence.
Pause Pause execution of the Equipment Sequence. When the active transition evaluates TRUE,
it does not transition to the FIRING state until you click Resume.
Auto-Pause Automatically pause the Equipment Sequence as transitions evaluate TRUE. When you
click Resume, the next transitions fire, but the Equipment Sequence pauses again after
each transition evaluates TRUE.
Resume Continue execution of the Equipment Sequence.
Enter Manual Put the Equipment Sequence in Manual mode, in which the sequencing engine does not
automatically fire transitions, and an operator commands the Equipment Sequence step
by step. On the toolbar, only the Release Ownership, Pause, Auto-Pause, and
Automatic commands are enabled.
Exit Manual Put the Equipment Sequence in Automatic mode, which allows the sequencing engine to
automatically fire transitions and execute the Equipment Sequence.

See also
Sequence Detail Control on page 85

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 Chapter 9 Sequence Detail Control

Overview of the Sequence The header area of the Sequence Detail Control shows live data values for the
currently loaded Equipment Sequence.
Detail Control status header
area

Item Name Description

Owners This box shows the current owner of the displayed Equipment Sequence and
visual indication of ownership overrides.
• Blank: No ownership.
• Logix Designer (<number>): The <number> indicates the number of Logix
Designer applications that have overridden ownership of the sequence.
• Operator: A user through the Sequence Manager Detail of the Sequence
Manager Summary ActiveX controls has attached to the sequence.
• Internal Sequencer: A program running within the controller has used the
Attach to Equipment Sequence (SATT) command to attach to the sequence.
• External Sequencer: An application outside the controller, the FactoryTalk
Batch Server, has attached to the sequence.

Unit ID Indicates the integer value currently assigned to the sequence. Configured
on the Sequence Properties Dialog Box, Configuration tab, that represents
the equipment unit the sequence is coordinating.
Sequence ID A string entered by the operator or control engineer using the Set ID button
to specify an identifier for this execution of the equipment sequence. Once
the sequence is executing (not in an IDLE state), the Sequence ID cannot be
changed.
State Shows the current state of the displayed Equipment Sequence. States are:
• IDLE
• RESTARTING
• RUNNING
• RESETTING
• HOLDING
• STOPPING
• ABORTING
• HELD
• STOPPED
• ABORTED
• COMPLETE

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Chapter 9 Sequence Detail Control
Item Name Description
Substate Displays the state of the bits in Pause Control. The following states are:
• Paused
• Pause Enabled
• Auto Pause Enabled
• Paused, Auto Pause Enabled

Mode Shows the current execution mode of the displayed Equipment Sequence,
either Automatic or Manual.

Overview of the Sequence The footer section on the Sequence Detail Control contains the following
settings and status indicators.
Detail Control status footer
The communication, failure, and unscheduled/inhibited icons are also
area displayed in the upper left corner of the diagram window, in the status bar,
and on any step or tag the status is detected.
Setting or status Description
Zoom control Adjusts the zoom on the control window.
Auto-Scroll Turn Auto-Scroll on or off.
Sequence name The name of the Equipment Sequence.
Status bar Displays the following status icons:

– There is a communication problem with the controller, the web server, the live data server,
or the tags.

– No known communication problem.

– There is a failure in the Equipment Sequence.

– No known failure in the Equipment Sequence.

– The controller is in Program, Remote Program, or an unknown mode.

– The controller is in Run, Remote Run, or an unknown mode.

– The Equipment Sequence or task is inhibited, or the Equipment Sequence is unscheduled.

– The Equipment Sequence is scanning, or the status is unknown.

See also
Sequence Detail Control on page 85

Monitor a step in the A monitored equipment sequence step shows several functions:

Sequence Detail Control • The user-configured step name and the Equipment Phase name.
• The step execution state.
• If the step is a source or target for a transfer of control.

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 Chapter 9 Sequence Detail Control
• If the step has a failure.
• The step is executing.
• If the step or associated phase is paused.

Item Description
Failure Phase failure - generated by the Equipment Phase Failure (PFL)
instruction in the Equipment Phase logic.
Internal failure - the sequencing engine has encountered a
problem with the Equipment Sequence.
Step Name The name of the step as configured during creation of the
Equipment Sequence.
Pause status The symbol shows that:
• A pause of the phase logic is pending.
• An auto-pause of the phase logic is pending.
• The associated Equipment Phase is paused.
• The associated Equipment Phase is paused and auto-
pause is pending.
Equipment Phase Name Each step is configured to reference one phase. The name of
the phase is displayed so you know which equipment phase is
executing.
Transfer of Control (TOC) A step that has been configured as the source to transfer
ownership to a following target step, without stopping the
execution of the phase.
The symbol shows:
• When the top bar is filled, this step is the beginning of a TOC
step pair.
• When the bottom bar is filled, this step is the end of a TOC
step pair.
• When both top and bottom bars are filled, this step is the
end of a TOC step pair and the beginning of another TOC step
pair.
When transfer of control is not configured, the symbols are not
drawn.
Step State When a step is active, and attached to its phase, the step state
mirrors the state of the phase. The set of displayed states are:
INACTIVE, NOT CONNECTED (active but not attached), IDLE,
RESTARTING, RUNNING, RESETTING, HOLDING, STOPPING,
ABORTING, HELD, STOPPED, ABORTED, and COMPLETE.
Tip: <No phase> steps have no associated phase and
only have two displayed states: RUNNING and
IDLE.
The step state is also represented by the color of the step.

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Chapter 9 Sequence Detail Control

Monitor a transition in the A transition has several displayed attributes and status. The transition name
Sequence Detail Control and expression are defined when the sequence is configured and static when
the sequence is online. The display state and firing attribute are dynamic and
update as the transition executes.

Item Description
Transition Name The name of the transition is assigned by the Equipment Sequence
Editor. It is an incremented value beginning with Tran_000.
Transition Display State The transition display state is indicated by the color of the transition.
For more information about transition display states, see Transition
display states.

Transition Expression Transition expressions define the criteria to STOP, RESET, and detach
all preceding steps and their associated Equipment Phases and
attach and START the Equipment Phases and steps. The expression
must always evaluate to either TRUE or FALSE.
Transition Firing Attribute The Transition Firing Attribute is only displayed when the transition is
in the FIRING state, which means the expression has evaluated TRUE.
The firing attribute is a subset of the FIRING state and gives a visual
indication of the current state.

92 Rockwell Automation Publication 1756-QS109D-EN-P - October 2020

 Chapter 10

Sequence Parameters Control

Use the Sequence Parameters Control to see a list of the step tags and
sequence parameters in an Equipment Sequence. Select tags and parameters
in the list to modify them or view more information about them.

To open the Sequence Parameters Control:

1. On the Start menu, choose:
Rockwell Software > FactoryTalk View > FactoryTalk View Site Edition Client.
2. Click Sequence Parameters Control.

See also
Modify step tags or sequence parameters using the Sequence
Parameters Control on page 99
Statuses in the Control footer on page 83

Configure the Sequence Configure the Sequence Parameters Control to communicate with a
controller or to use VBA by customizing settings in the Property Panel for the
Parameters Control control.

Before you begin:

• Open the FactoryTalk View Site Edition (SE) application.
• Open a display that contains the Sequence Parameters Control.

See also
Configure the Sequence Parameters Control to communicate with a
controller on page 94
Configure the Sequence Parameters Control display options on page
94

Configure the Sequence Parameters Control to use VBA on page 95

Sequence Parameters Control on page 93

Sequence Parameters Control property settings on page 96

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Chapter 10 Sequence Parameters Control

Configure the Sequence Configure the Sequence Parameters Control to communicate with a
controller.
Parameters Control to
communicate with a
To configure the Sequence Parameters Control:
controller
1. In the display window, right click the Sequence Parameters Control.
2. Select Property Panel.
3. In the ControllerPath property text box, enter the path for the
controller.
4. In the ControllerShortcut property text box, enter the RSLinx
Enterprise device shortcut name to the controller.
5. In the DataServerPath property text box, enter the FactoryTalk path to
the RSLinx Enterprise data server.
6. In the SequenceName property text box, enter the name of the
Equipment Sequence.
7. In the SeqMgrServerPortNumber property text box, enter the port
number that was defined during the installation of the server.

See also
Configure the Sequence Parameters Control display options on page
94
Configure the Sequence Parameters Control to use VBA on page 95

Configure the Sequence Configure the Sequence Parameters Control by customizing display options.

Parameters Control display

options To configure the Sequence Parameters Control display options:
1. Right click the Sequence Parameters Control in the display window.
2. Select Property Panel.
3. Select display options:
• (optional) In the Column1Content property text box, select a
content option for the column.
• (optional) In the Column2Content property text box, select a
content option for the column.
• (optional) In the Column3Content property text box, select a
content option for the column.
• (optional) In the Column4Content property text box, select a
content option for the column.
• (optional) In the Column5Content property text box, select a
content option for the column.

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 Chapter 10 Sequence Parameters Control
• (optional) In the Column6Content property text box, select a
content option for the column.
• (optional) In the Column7Content property text box, select a
content option for the column.
• (optional) In the Column8Content property text box, select a
content option for the column.
• (optional) In the CurrentFilter property text box, select an option to
filter the display to Sequence Parameters, step tags, selected steps,
active steps, or all.
• (optional) In the ShowFilter property text box, select True to
display the filter control.
• (optional) In the ShowSequenceHeader property text box, select
True to display the sequence header.
• (optional) In the ShowStatusBar property text box, select True to
display the status bar.
• (optional) In the SortField property text box, select an option to sort
by that field.
• (optional) In the SortOrder property text box, select an option to
sort ascending or descending.
• (optional) In the TouchPointerSize property text box, select an
option to auto-size, decrease, or increase the size of buttons.
4. Close the Property Panel window.
5. Select Save.

See also
Configure the Sequence Parameters Control to communicate with a
controller on page 94
Configure the Sequence Parameters Control to use VBA on page 95

Configure the Sequence Configure the Sequence Parameters Control to use VBA.

Parameters Control to use

VBA To configure the Sequence Parameters Control to use VBA:
1. In the display window, right click the Sequence Parameters Control.
2. Select Property Panel.
3. In the ExposeToVBA property text box, select VBA Control to allow
the Sequence Detail Control to use VBA for scripting.
4. Close the Property Panel window.
5. Click Save.

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Chapter 10 Sequence Parameters Control

See also
Configure the Sequence Parameters Control to communicate with a
controller on page 94
Configure the Sequence Parameters Control display options on page
94

Sequence Parameters The Sequence Detail Control has the following properties that are
configurable in the Property Panel of the control in the FactoryTalk View SE
Control property settings application.
Property name Description Read Value type
only
AutoLoad Determines if the sequence No Boolean
chart is loaded automatically
after the FactoryTalk View SE
runtime starts.
Column1Content Determines what content is No • 1 – Usage
displayed in Column 1. • 2 – Value
• 3 – Initial Value
• 4 – Initialize As Valid
• 5 – Expression
• 6 – Data Type
• 7 – Description
• 8 – Engineering Unit
• 9 – Not Used
Column2Content Determines what content is No • 1 – Usage
displayed in Column 2. • 2 – Value
• 3 – Initial Value
• 4 – Initialize As Valid
• 5 – Expression
• 6 – Data Type
• 7 – Description
• 8 – Engineering Unit
• 9 – Not Used
Column3Content Determines what content is No • 1 – Usage
displayed in Column 3. • 2 – Value
• 3 – Initial Value
• 4 – Initialize As Valid
• 5 – Expression
• 6 – Data Type
• 7 – Description
• 8 – Engineering Unit
• 9 – Not Used

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 Chapter 10 Sequence Parameters Control
Property name Description Read Value type
only
Column4Content Determines what content is No • 1 – Usage
displayed in Column 4. • 2 – Value
• 3 – Initial Value
• 4 – Initialize As Valid
• 5 – Expression
• 6 – Data Type
• 7 – Description
• 8 – Engineering Unit
• 9 – Not Used
Column5Content Determines what content is No • 1 – Usage
displayed in Column 5. • 2 – Value
• 3 – Initial Value
• 4 – Initialize As Valid
• 5 – Expression
• 6 – Data Type
• 7 – Description
• 8 – Engineering Unit
• 9 – Not Used
Column6Content Determines what content is No • 1 – Usage
displayed in Column 6. • 2 – Value
• 3 – Initial Value
• 4 – Initialize As Valid
• 5 – Expression
• 6 – Data Type
• 7 – Description
• 8 – Engineering Unit
• 9 – Not Used
Column7Content Determines what content is No • 1 – Usage
displayed in Column 7. • 2 – Value
• 3 – Initial Value
• 4 – Initialize As Valid
• 5 – Expression
• 6 – Data Type
• 7 – Description
• 8 – Engineering Unit
• 9 – Not Used
Column8Content Determines what content is No • 1 – Usage
displayed in Column 8. • 2 – Value
• 3 – Initial Value
• 4 – Initialize As Valid
• 5 – Expression
• 6 – Data Type
• 7 – Description
• 8 – Engineering Unit
• 9 – Not Used

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Chapter 10 Sequence Parameters Control
Property name Description Read Value type
only
ControllerPath Controller path of the No String
Equipment Sequence. This path
is specific to the workstation
on which the Web Server is
communicating with is located.
Path Example: AB_ETH-
1\99.99.99.99\Ba
ckplane\0

ControllerShortcut RS Linx(RSLinx) Enterprise No String

device shortcut to the
controller.
Default Value: MY_CONTROLLER
CurrentFilter Determine which filter is No • 0 – All
currently being used. • 1 – SequencingParameters
Default value: 0 – All • 2 – StepTags
• 3 – SelectedSteps
• 4 – ActiveSteps
DataServerPath The FactoryTalk path to the RS No String
Linx(RSLinx) Enterprise Data
Server.
Example Path:
RNA://$Local/MyP
roject/
IsEveryTagConnected Displays whether every tag is Yes Boolean
connected to the ActiveX
Control.
Default value: True
IsLiveDataConnected Displays whether the live data Yes Boolean
server is connected to the
ActiveX Control.
Default value: False
IsWebServerConnected Displays whether the web Yes Boolean
server is connected to the
ActiveX Control.
Default value: False
IsWebServerToControllerConnect Displays whether the web Yes Boolean
ed server is connected to the
controller.
Default value: False
LoadTable Determines if the table is No Boolean
loaded to the window.
SelectedSteps Names of the selected steps. If No String
multiple step names are
entered, each step name must
be separated by a comma from
other step names.
SequenceName Name of the Equipment No String
Sequence that the chart loads
if a load is initiated using the
AutoLoad or LoadChart
properties.

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 Chapter 10 Sequence Parameters Control
Property name Description Read Value type
only
SequenceState Displays the state value of the Yes Integer
displayed Equipment Sequence.
ShowFilter Determines if the filter box is No Boolean
shown.
ShowSequenceHeader Determines if the sequence No Boolean
header is shown.
ShowStatusBar Determines if the status icons No Boolean
are shown.
SortField Determines which column the No • 0 – ParameterName
table is sorted on. • 1 – ParameterUsage
• 2 – ParameterExpression
• 3 – ParameterDataType
• 4 – ParameterDescription
SortOrder Determines which order the No • 0 – Ascending
table is sorted, ascending, or • 1 – Descending
descending.
TouchPointerSize Determines the size of the No • 1 – sqmLarge
command buttons and the • 2 - sqmSmall
height of the fields in the
header and footer areas.
WebServerAddress The IP address of the No String
workstation hosting the Web
Server.
WebServerPortNumber The port number of the No String
workstation hosting the Web
Server.

See also
Configure the Sequence Parameters Control on page 93
Sequence Parameters Control on page 93

Modify step tags or Select a step tag or sequence parameter from the list on the Sequence
Parameters Control to modify, disable or enable, force evaluation of, or view
sequencing parameters more information about the step tag or sequence parameter.
using the Sequence Tip: To modify settings for tags and parameters, the external value for the tags and parameters must be

Parameters Control set to Read/Write. Use the Tag Editor in the Logix Designer application to change the external value
for a tag or parameter.

To modify a tag or parameter:

1. Select the tag or parameter.
2. In the Value box, type the new value for the tag or parameter.
3. To disable or enable a tag or parameter, click Expression and then
click Disable Expression or Enable Expression. The disabled icon

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Chapter 10 Sequence Parameters Control
appears in the Expression box. To re-enable a disabled tag or
parameter, click Expression and then click Enable Expression. The
disabled icon disappears from the Expression box.
4. To force evaluation of a tag or parameter, click Expression and then
click Force Evaluation. The Force Evaluation button is disabled when
any of the following is true:
• The Equipment Sequence is in the IDLE state.
• The controller is in Program mode.
• The Equipment Sequence or its assigned task is disabled.
• The Equipment Sequence is unscheduled.

To view more information for a tag or parameter:

1. Select the tag or parameter.
2. Click View Expression to display the complete expression. Click View
Description to display the complete description.

See also
Sequence Parameters Control on page 93

100 Rockwell Automation Publication 1756-QS109D-EN-P - October 2020

 Index

Index

C
commands 66, 70, 81, 87

D
diagrams 19, 21, 41

E
equipment sequence 13, 17, 19, 20, 21, 41,
51, 52, 54, 71
example 41

M
mode 70

O
overview 13, 17, 62, 63, 89, 90
ownership 67

Q
quality of data 64

S
Sequence Detail Control 77, 85, 87, 89, 90,
92
Sequence Parameter Control 77, 93, 99
Sequence Summary Control 77, 79, 81
sequencing parameter 66
step 52, 53, 54, 55, 57, 90
step tag 66

T
transition 62, 63, 92

Rockwell Automation Publication 1756-QS109D-EN-P - October 2020 101

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Rockwell Automation Publication 1756-QS109D-EN-P - October 2020

Supersedes 1756-QS109C-EN-P - June 2016 Copyright © 2020 Rockwell Automation Technologies, Inc. All Rights Reserved. Printed in the U.S.A.