Reference Manual

Rockwell Automation Sequencer Object

Version 3.1

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).
Allen-Bradley, Rockwell Software, Rockwell Automation, RSLogix, Logix5000, FactoryTalk, PlantPAx, and ControlLogix are trademarks of Rockwell Automation, Inc.
Trademarks not belonging to Rockwell Automation are property of their respective companies.

Table of Contents
Preface

Software Compatibility and Content Revision. . . . . . . . . . . . . . . . . . . . . . . . 5

Additional Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Rockwell Automation Sequencer

Object (P_Seq)

Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Step User-defined Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Operator Prompt. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
State Machine. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Step Timer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Branching and Looping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Alarm Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Sequencer Demonstration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Programming Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Configuring the Sequencer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Configuring the Sequence Steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Branch on Input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Multi-Step Configuration Dialog Box . . . . . . . . . . . . . . . . . . . . . . . . . 32
Required Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Controller File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Visualization Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Controller Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Sequencer Object InOut Structure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Sequencer Object Input Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Sequencer Object Output Structure. . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Sequencer Object Local Configuration Tags . . . . . . . . . . . . . . . . . . . . 44
Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Simulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Execution. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Display Element . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Status/Quality Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Maintenance Bypass Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Mode Indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Alarm Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Using Display Elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Quick Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Faceplate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Operator Tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Maintenance Tab. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Engineering Tab. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Configuring a Range for Scaling Parameters . . . . . . . . . . . . . . . . . . . . 64
Diagnostics Tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Alarms Tab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Sequencer Faceplate Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

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Notes:

Rockwell Automation Publication PROCES-RM006B-EN-P - August 2014

Preface
This document is updated throughout for version 3.1 of the Rockwell
Automation Sequencer Object. Changes for this revision are marked by change
bars shown in the right margin.

Software Compatibility and

Content Revision

Table 1 - Summary of Changes

Topic

Page

Changed title from 'PlantPAx Library of Process Objects' to 'Rockwell Automation Sequencer
Object'

Front Cover

Changed version of Rockwell Automation Sequencer Object from 3.0 to 3.1

5, 34, 35

Changed references to Knowledgebase Answer ID 62682 to Product Compatibility and Download

Center

5, 34

Added Important notes:

display availability in FactoryTalk Machine Edition (ME) software
Run Time Detail faceplate is not available in FactoryTalk View ME software
Multiple Step Sequence Configuration button is not available for FactoryTalk View ME software
configuration display has minor differences for FactoryTalk View ME software
Multi-Step Configuration Dialog Box is available only in FactoryTalk View SE software
Visualization File Types table:
added Important note concerning the order files are to be imported
added Optional Graphic Displays section
updated FactoryTalk View (ME) entries

7
12
20
28
32
34
35

Input Parameters table:

added 'PSet_, OSet_, MSet_' parameter description to bullet list
added 'Alias For' column and aliases
added 'MCmd_Acq', 'MCmd_Rel', 'Cfg_ProgDefault', and 'OCmd_StdQtyReset' parameters
'Cfg_IOFaultSeverity' - changed level 4 alarm severity from 'Highest' to 'Urgent'

36

Output Parameters table:

added 'Nrdy_', 'Err_', Ack_', 'and Alm_', parameter descriptions to bullet list
added 'Alias For' column and aliases
added 'Nrdy_CfgError', 'Nrdy_Intlk', 'Nrdy_Perm', 'Nrdy_NoMode', 'Sts_MAcqRcvd', and
'Rdy_StdQtyReset' parameters
'Val_Notify' - changed level 4 alarm severity from 'Highest' to 'Urgent'

40

Operations - added Simulation section

46

Status/Quality Indicators table:

added symbol and description for 'Device disabled'
added list of conditions under which Device Not Ready indicator appears
changed level 4 alarm severity from 'Highest' to 'Urgent'

47

Operator tab:
added Interlock and Permissive descriptive paragraph and links to documents
added alarm location image

55

Maintenance tab - added Force Timer section

58

Diagnostics tab - added section

65

For the latest compatible software information and to download the Rockwell
Automation Library, see the Product Compatibility and Download Center at
http://www.rockwellautomation.com/rockwellautomation/support/
downloads.page?.

Rockwell Automation Publication PROCES-RM006B-EN-P - August 2014

Preface

Additional Resources

These documents contain additional information concerning related products

from Rockwell Automation.
Resource

Description

PlantPAx Process Automation System Selection Guide,

publication PROCES-SG001

Provides information to assist with equipment

procurement for your PlantPAx system.

PlantPAx Process Automation System Reference Manual,

publication PROCES-RM001

Provides characterized recommendations for

implementing your PlantPAx system.

Rockwell Automation Library of Process Objects,

publication PROCES-RM002

Provides general considerations for the Rockwell

Automation system library of process objects.

FactoryTalk View Machine Edition User Manual,

publication VIEWME-UM004

Provides details on how to use this software package for

creating an automation application.

FactoryTalk View Site Edition User Manual,

publication VIEWSE-UM006

Provides details on how to use this software package for

developing and running human-machine interface
(HMI) applications that can involve multiple users and
servers, distributed over a network.

Logix5000 Controllers Add-On Instructions Programming

Manual, publication 1756-PM010

Provides information for designing, configuring, and

programming Add-On Instructions.

Rockwell Automation Library of Process Objects: Common

Alarm Block (P_Alarm) Reference Manual,
publication SYSLIB-RM002

Details how to monitor an input condition to raise an

alarm. Information includes acknowledging, resetting,
inhibiting, and disabling an alarm. Generally the
P_Alarm faceplate is accessible from the Alarms tab.

Rockwell Automation Library of Process Objects: Interlocks

with First Out and Bypass (P_Intlk) Reference Manual,
publication SYSLIB-RM004

Explains how to collect (sum up) the interlock

conditions that stop or de-energize a running or
energized piece of equipment or prevent it from
starting or being energized.

Rockwell Automation Library of Process Objects: Common

Mode Block (P_Mode) Reference Manual,
publication SYSLIB-RM005

Explains how to choose the Mode (owner) of an

instruction or control strategy. The Mode instruction is
usually embedded within other instructions to extend
their functionality. It is possible to use a standalone
Mode instruction to enhance a program where modes
are wanted.

Rockwell Automation Library of Process Objects: Permissives

with Bypass (P_Perm) Reference Manual,
publication SYSLIB-RM007

Details how to collect permissive conditions to start a

piece of equipment.

Rockwell Automation Library of Process Objects: Operator

Prompt Reference Manual, publication SYSLIB-RM046

Explains how to set up and use the Operator Prompt.

The instruction can prompts an operator with various
types of information (message or data) and accepts
operator-input data and confirmation.

You can view or download publications at

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

Rockwell Automation Publication PROCES-RM006B-EN-P - August 2014

Rockwell Automation Sequencer Object (P_Seq)

The Rockwell Automation Sequencer Object (P_Seq) provides a flexible

controller-based step sequencing solution that reduces engineering time by
automating common operator procedures. The step-by-step configuration makes
it easy to adjust procedures directly from the HMI displays without having to
create or modify custom code in the controller. The Sequencer can be employed
in simple and complex sequences without costly re-engineering and testing. You
add, delete, or modify steps needed to accomplish your sequences objective.
The global object and faceplate shown below are examples of the graphical
interface tools for this Add-On Instruction.
Add-On Instruction

Faceplate

Global Object

Guidelines

The P_Seq Add-On Instruction and graphics provide bit-based sequencing with
the following features:
Up to 32 discrete (BOOL) outputs for controlling or commanding devices
Up to 32 discrete (BOOL) inputs for monitoring device feedback
Up to 32 floating-point number (REAL) outputs for setpoints or
parameter values
A maximum of 500 steps
Rich and intuitive human-machine interface (HMI) screens for operation,
monitoring, and configuration
IMPORTANT

Not all displays are available for FactoryTalk View Machine Edition (ME)
software.

Short Add-On Instruction scan time for use in fast-scan control strategies

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State model consistent with higher-level procedural control, with states

for Idle, Running, Complete, Held, Paused, and Stopped
Use this instruction in these situations:
You need to implement a procedure to operate equipment in a
prescribed order (open valve, start pump, and so forth). A procedure
is described in the International Society of Automation Technical
Report ISA-TR106.00.01-2013 as the following:
A specification of a sequence of actions or activities with a defined
beginning and end that is intended to accomplish a specific objective.
Although the Sequencer is intended for basic sequencing that is typical
of control and equipment implementation modules (as defined in
TRI06.00.01), the P_Seq instruction can be used at any level and in
any application where its functionality is appropriate.
Do not use this instruction in these situations:
The implementation of a batch phase, such as material addition, agitation,
transfer, and so forth, where holding, restarting, or resetting logic is
required. Use the Phase Manager cpability of Logix Controller insteqad.
If you need sophisticated Sequential Function Chart (SFC) procedures,
such as simultaneous threads and multi-selection branches.

Functional Description

The 32 Boolean outputs are used to assert commands to devices. The 32 Real
outputs are used to set setpoints or references. Each output (Boolean or Real) can
be used optionally in each step, and each output is explicitly defined even if its
not used in a step.
The 32 inputs are used to monitor Boolean signals from devices or logic to
determine when a desired state or combination of states, have been achieved,
signaling the end of the step.
In operation, when a step is executed, the output values are presented at the
Sequencer instruction outputs before the first check of the input conditions. In
this way the output values for each step are present for at least one scan of the
Sequencer.

Step User-defined Type

To achieve the greatest flexibility with regard to step information storage and
number of steps in a sequence, a separate user-defined type (UDT) is supplied to
store the step information (P_SeqStep). You create an array of these UDT
members to hold the step configurations of the sequence. Array length is from
2500 steps. The first step of the array is not available because its used by the
Sequencer instruction for other features and bookkeeping.

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Rockwell Automation Sequencer Object (P_Seq)

Operator Prompt
The P_Prompt instruction can be used with the Sequencer to perform manual
prompt operations, such as operator messaging, entering values, or decisionmaking in the flow of steps.
See Rockwell Automation Library of Process Objects: Operator Prompt
Reference Manual, publication SYSLIB-RM046 for more information on the
Operator Prompt.

State Machine
The P_Seq instruction executes the following state machine.

IMPORTANT

No procedural steps are executed in the Idle, Starting, Held, Complete, or

Stopped states. The only action is outputs are commanded to their
configured positions.

Step Timer
Each step has an optional timer which, when configured, is included in the
qualification conditions of the step, along with the Boolean inputs configured.
The timer configuration options provide the flexibility for the following type of
scenarios:
Timing when entering a step
Timing after inputs are qualified

Branching and Looping

The Sequencer normally proceeds from one step to the next through the array of
steps. The Sequencer can be configured for four different types of branching to
accommodate looping and decisions. Branching lets the Sequencer jump to
another step, and not necessarily run steps in sequential order.

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Rockwell Automation Sequencer Object (P_Seq)

If branching is configured for a step there are four options:

Continuous - Always take a branch
Loop count - Take a branch until the step has been executed a given
number of times
Input pattern - Take a branch if a specific input pattern exists within the
Boolean inputs
Manual prompt - Configure the manual prompt to prompt you for a
branching decision
See page 31 for more information.

Alarm Options
There are three optional alarms that can be configured to instruct the Sequencer
to take a particular action if an alarm occurs. The Alarm Summary tab shows one
of these records.
Interlock Trip - Alerts you that an interlock condition has been triggered.
Sequence Timeout - Alerts you that a sequence has run longer
than expected.
Step Timeout - Alerts you that a step has run longer than expected.
Engineering configuration options let you determine what action the Sequencer
is to take if an interlock trips, if the Step Fault Timer expires, or the Sequencer
Fault Timer expires.

10

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Rockwell Automation Sequencer Object (P_Seq)

Sequencer Demonstration
This section illustrates basic Sequencer functionality. Figures show the faceplates
for each step in our example sequence. The Sequencer is the engine doing the
work and the sequence is the order of actions to complete a procedure.
There are a multitude of lists of procedures that you can use with the Sequencer.
This example uses an ordinary list to automate how to ignite a water heater.

1. Click the display element for the sequence.

Our example is Heater Ignition.

The Operator tab appears with buttons to operate the Sequencer.

Rockwell Automation Publication PROCES-RM006B-EN-P - August 2014

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Rockwell Automation Sequencer Object (P_Seq)

The Sequencer operator buttons from

left to right:
Start command
Stop command
Reset command

Access to Detail Faceplate

Current Step and Sequence Timers

Sequence Control and

Pause Management Buttons

These same buttons also are available on the Run Time Detail faceplate
that visually arranges the progress of the sequential steps.
2. Click the magnifying glass
IMPORTANT

to access the Run Time Detail faceplate.

The Run Time Detail faceplate is different for FactoryTalk View SE software and
FactoryTalk View ME software. (See FactoryTalk View ME on page 14.)

Sequencer Operator Buttons

Steps of Sequence

Inputs

Icons toggle between the digital

and analog outputs
Outputs

12

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Rockwell Automation Sequencer Object (P_Seq)

IMPORTANT

The figures in the following procedure are for FactoryTalk View SE

software except as noted.
FactoryTalk View ME software shows only the inputs for the active step
and does not show input requirements for inactive steps.

3. On the FactoryTalk View SE or ME Operator Detail faceplate, click the

Start command

button.

Step 1: Purge (Verify pilot and main off for 1 minute)

FactoryTalk View SE
Step Progress
Column turns green to show the current
step is in progress. Column turns yellow if
a running sequence is held.
For this step configuration, outputs are
set to zero (0) for Off.
Button turns blue to indicate On (1 for
true) when the Sequencer verifies the
pilot valve and main valve are closed.
When the tip of the symbol points up the
input must be On to qualify; when the tip
is down the input must be Off to qualify.
When the input condition is qualified,
a black dot appears in the middle of
the icon.
The step wait timer starts after all the
input conditions have been qualified.
The shaded areas on the icon
signify if the timer starts after the
qualification of the step (shading on the
right side) or at the beginning of the step
(shading on the left side) per user
configuration.

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Rockwell Automation Sequencer Object (P_Seq)

FactoryTalk View ME
Step Progress
Column turns green to show the current
step is in progress. Column turns yellow if
a running sequence is held.
For this step configuration, outputs are
set to zero (0) for Off.
Button turns blue to indicate On (1 for
true) when the Sequencer verifies the
pilot valve and main valve are closed.
When the tip of the symbol points up the
input must be On to qualify; when the tip
is down the input must be Off to qualify.
When the input condition is qualified,
a black dot appears in the middle of
the icon.
The step wait timer starts after all the
input conditions have been qualified.
When the arrow is clicked, the second set
of 16 inputs and outputs are displayed. An
arrow appears near the top of the page
that toggles back to the first set of inputs
and Outputs. This action is the same for
FactoryTalk SE and ME software.

IMPORTANT
Step 2: Open Pilot

The rest of the faceplates in this example are for FactoryView SE software.
(Set pilot on)

Step Progress
Column turns green to show the current
step is in progress.
The Pilot output (far right column) displays
a 1 for true; this is a request for the pilot
valve to be open.
Pilot valve is opened (shown by a blue
circle).
Black dot in the icon signifies
this condition is qualified.

14

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Rockwell Automation Sequencer Object (P_Seq)

Step 3: Ignite (Trigger ignitor)

Step Progress
Column turns green to show the current
step is in progress.
Sequencer ignites the pilot and the step
wait timer starts.
The Ignition output displays a 1 for true;
requesting ignitor on.

Step 4: Check if Lit (Verify Lit a. If lit, proceed to step 7 b. If not lit, after 3 retries close valves)

Step Progress
Column turns green to show the current
step is in progress.
Sequencer checks if the pilot is lit.
If lit, the ignitor turns off (0 in output).
The sequence branches to step 7.
If not lit, ignitor turns off and the
sequence branches back to step 3 to
re-ignite the pilot. If the loop count
reaches the maximum number of
attempts, a fault condition can be set.

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Rockwell Automation Sequencer Object (P_Seq)

Step 5: Repeat 3x (If lit, proceed to step 7)

Step Progress
Column turns green to show the current
step is in progress based on input
conditions.
If pilot is lit, branch to step 7.
If pilot is unlit, branch to step 3 to retry
igniting the pilot.
After a third unsuccessful attempt to
ignite the pilot, proceed to step 6.

Step 6: Ignition Failure (Set pilot off, set main fuel off; fault notify)

Step Progress
Column turns green to show the current
step is in progress.
Sequencer enables output to prompt a
fault if pilot not lit after three tries. An
operator can interact with discrete
inputs/outputs or a HMI-based prompt.
Sequencer waits per timer setting for fault
to be acknowledged.
After a fault is acknowledged, the
sequence branches to the end.

16

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Rockwell Automation Sequencer Object (P_Seq)

Step 7: Open Main Supply (Open main supply)

Step Progress
Column turns green to show the current
step is in progress.
Sequencer opens the main supply valve,
1 in output.

Step 8: Set Temp SP (Set temperature setpoint to 120 F and shut off pilot)

Step Progress
Column turns green to show the current
step is in progress.
Once the heater is lit, pilot is closed, the
temperature setpoint is set to 120 F.
When the Sequence is done, the status
reads Complete and the reset icon
appears active (in color).

Tip: At the end of the sequence, the

Sequencer steps through the remaining
steps. Set a branch to the last step to
complete the sequence faster.

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Rockwell Automation Sequencer Object (P_Seq)

Programming Example

This section describes how to program the individual steps of the sequence
shown in the Sequencer demonstration, starting on page 11.
1. Create the P_Seq instruction in your program and give the instruction
a name.
TIP

The screen examples show portions of the ladder logic diagram. You
also can use the P_Seq instruction in function block diagrams and
structured text language.

2. Crate the new tags, one for the P_Seq instruction, and one for the
step array.
The name of the Ref_Steps tag must equal the tag name of the Sequencer
plus _Steps. Our example is Heater_Steps. The faceplate looks for this tag
name for step configuration details.
When you create the step array tag, type a number into the bracket of the
array tag (P_SeqStep) to configure the number of steps to be included in
the sequence.

The actual number of usable steps in a sequence is the array length

minus one. For example, if you type 12, you have 11 usable steps.
18

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Rockwell Automation Sequencer Object (P_Seq)

3. Attach the devices associated with the sequence.

This example shows a few of the rungs linking the Sequencer to two
P_ValveSO objects for the pilot and main gas valves, a P_DIn object for
the flame sensor, a P_DOut object for the ignitor, and a temperature
setpoint.

4. Save the file and download.

5. If you make modifications from the HMI, save the .acd file again.

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Rockwell Automation Sequencer Object (P_Seq)

There are buttons (circled) at the top and bottom of the Engineering tab of the
P_Seq instruction to access additional dialog boxes to configure the Sequencer
and the sequence, respectively.
For descriptions of the entry boxes, see page 62.

Overall Sequence and Sequencer Input and

Output Configuration

Step-by-step Sequence Configuration

IMPORTANT

Multiple Step Sequence Configuration

The Multiple Step Sequence Configuration button in the above figure is not
available for FactoryTalk View ME software.

Configuring the Sequencer

You must define what the Sequencer is capable of controlling and monitoring by
specifying the attributes of the inputs and outputs.
1. To configure how many inputs are being used by the Sequencer, click the
Display Sequence Config Window

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Rockwell Automation Sequencer Object (P_Seq)

The Discrete Input Configuration dialog box appears.

2. Complete the Discrete (BOOL) Input Configuration dialog box.

Topic

Description

Input

Check for each of the 32 inputs that are being

configured to be used by the Sequencer.

Label

Type a name or description for the input in the

text box. This label is used as a reference in
multiple displays.

Allow Force

Check to enable force qualification of an input

during the operation of a step. Leave the checkbox
blank if the input cannot be forced.
IMPORTANT: By checking the checkbox, a user with
Maintenance privileges or higher can force an input
to be qualified even though it is not in the required
state for that step when the Sequencer is running.

Allow Navigation to Input Source Tag

Check to enable navigation to the faceplate of the

device. This functionality requires the device to be in
the same program as the
P_Seq instruction and be a Rockwell Automation
Library object.

IMPORTANT

Make sure to press Enter or click the Page Down key after typing in a
text box to save your work. Enter saves data on the current entry box
that you are on; Page Down saves all string data for the entire page.

3. To configure the outputs, click the Output Configuration

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Rockwell Automation Sequencer Object (P_Seq)

The Discrete Output Configuration dialog box appears.

4. Complete the Discrete (BOOL) Output Configuration dialog box.

22

Topic

Description

Digital Output

Type a name or description for the output in the

text box. This label is used as a reference in
multiple displays.

Stopped Output

Check to specify whether the output is written

(*checked) or left in its last state (unchecked) when
the Sequencer is in the Stopped state. Click the value
field to toggle the value to write between 0 and 1.

Held Output

Optional checkbox to specify whether the output is

written (checked) or left in its last state (unchecked)
when the Squencer is in the Held state. Click the
value field to toggle the value to write between
0 and 1.

Track Input

Use the default check to track an outputs track input

value when its not being used in a step.

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Rockwell Automation Sequencer Object (P_Seq)

IMPORTANT

An element of the P_SegStep array tag is called Cfg_RealOut. This

associated tag is the number of REALs for your sequence. The tag has a
default setting of eight REAL outputs. If you need more Real outputs
(32 maximum) then you must configure the Cfg_RealOut array in the
P_SeqStep UDT definition to the desired number. You also can reduce
the number, if fewer REALs are needed, to save controller memory.

To configure the number of REALs, open the P_SeqStep UDT and

change the number in the bracket of the Cfg_RealOut tag.

5. Click the Analog Output Configuration

button.

The Analog Output Configuration dialog box appears with a number of

entry fields that you specified for the array tag.

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Rockwell Automation Sequencer Object (P_Seq)

6. Complete the (REAL) Analog Output Configuration dialog box.

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Topic

Description

Analog Output

Type a name or description for the output in the

text box. This label is used as a reference in
multiple displays.

Scaled

Check to scale the output value based on the

quantity entered at the start of a sequence.
For example, if the REAL is 40 lb and the Quantity is
50%, the REAL output value is 20 lb.

Stopped Output

Optional checkbox to specify a specific value for the

output when the Squencer is in the Stopped state.

Held Output

Optional checkbox to specify a specific value for the

output when the Squencer is in the Held state.

Track Input

Use the default check to track an outputs track input

value when its not being used
in a step.

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Rockwell Automation Sequencer Object (P_Seq)

Configuring the Sequence Steps

This section describes how to configure what is to occur in each individual step of
the sequence. Each step is configured with the inputs, outputs, and analog
outputs that you set up for the Sequencer to run.
You also have the option of setting up multiple sequence steps on one dialog box
if there are minimal input conditions per step. See page 32 for details.
1. At the bottom of the Engineering tab (see page page 20), click the
Display Step Config Window

button.

The Home Step Configuration dialog box appears.

Step 1 formatting is shown below but the same dialog box is used to
configure all your steps in the sequence.

2. For each step, complete the dialog box for the actions to be taken to
accomplish the step based on the respective input condition.
Table 2 - Home Step Configuration Description
Topic

Description

Name

Type a name for the step.

IMPORTANT: Make sure to press Enter or press the
Page Down key after typing in a text box to save
your work.

Update the Restart Address. If the Sequence is held,

it restarts from the last saved step

Check for the sequence to restart from the last saved

step the restart was configured.

Reset the Sequence Fault Timer at the beginning of

the step

Check to reset the sequence fault timer at the

beginning of the step.

Sequence can be paused after this step

Check to enable a pause. A pause cannot occur for a

step unless you check this box.

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Rockwell Automation Sequencer Object (P_Seq)

Table 2 - Home Step Configuration Description

Topic

Description

Enable an operator prompt

Check to enable an operator prompt for the step. A

blank box appears. Click the box to configure the
operator prompt for the step.
See Rockwell Automation Library of Process Objects:
Operator Prompt Reference Manual, publication
SYSLIB-RM046 for more information on the Operator
Prompt.

Sequence Step Branching

See step 3 and step 4 for details.

Click to insert a new step before this step.
IMPORTANT: See Insert and Delete Rules for
Branching on page 27.
Click to delete this step from the sequence.
IMPORTANT: See Insert and Delete Rules for
Branching on page 27

Step fault timer preset (msecs)

Type a value to trigger a fault if the time to complete

this step exceeds the timer setting.

If the step is held, the Fault Timer...

Stops and holds its value
Stops and resets
Continues timing

Click the action of the step fault timer if a Held

state occurs.

Step wait timer preset value (msecs)

Type a value to have a step wait based on the

conditions of the next field.
IMPORTANT: A setpoint of 0 disables the timer.

Step wait timer starts...

After all required inputs have qualified
At the beginning of the step

Click the action of the wait timer.

IMPORTANT: If you select At the beginning of the
step, you cannot select the next two wait timer
settings for qualified and disqualified inputs.

Do not wait on timer if all inputs are qualified upon

step entry

Check to waive the wait timer if all the inputs are

qualified upon step entry.
IMPORTANT: This checkbox is not available if the
wait timer is set to start at the beginning of the step.

If an input becomes disqualified, the Wait Timer...

Stops and holds its value
Stops and resets
Continues timing

Click the action of the wait timer for disqualified

inputs.
IMPORTANT: This checkbox is not available if the
wait timer is set to start at the beginning of the step.

If a step is held, the Wait Timer...

Stops and holds its value
Stops and resets
Continues timing

Click the action of the wait timer for a step in a

Held state.

The Sequence Step Branching dialog box defaults with a check to not
branch (jump forward or backward) to another step.

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3. Clear the checkmark in the Do not branch box to display branch

entry boxes.

4. Complete the Sequence Step Branching dialog box.

Topic

Description

Do not branch. Next step is #

Leave the checkbox blank to branch. Check to

remove the branching boxes.

Branch Target Step

Type the number of the step that the Sequencer

branches to based on the branch conditions below.

Branch to Target Step...

Always
Based on input conditions
Until Loop Count is reached

Click the action of the branch. If a loop count is

selected, an entry field appears for a value.
See IMPORTANT statement below.

Final Loop Count

Type the number of times to execute this step before

continuing with the next step instead of branching.

IMPORTANT

If Based on input conditions is selected for the branch target step, a

branch
button appears at the top of the dialog box. Click the
button to access the affected input to configure the branch state.
See Branch on Input on page 31 for details.

Insert and Delete Rules for Branching

The table explains how the Sequencer adjusts the Branching or Branch Targets if
there is branching in a sequence and you insert or delete steps.
Insert Steps
Branch Target

Result

Last step number

No change

Lower step number than inserted

step number

No change

Higher step number than inserted

step number

Target step number plus 1

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Delete Steps
Branch Target

Result
Branch Conditions
Unconditional(1)

Conditional(2)

Branch Target

Result

Result

Last step number

No change

No change

Deleted Branch Target step

No change

Branch deleted

Lower step number than deleted

step number

No change

No change

Higher step number than deleted

step number

Target step number minus 1

Target step number minus 1

(1) Unconditional = Always (branch option).

(2) Conditional = Loop count, Input condition or Prompt (branch options).

The following procedures are for associating the Sequencer inputs,

outputs, and analog outputs with each step of the sequence.
5. At the top of the Home Step Configuration dialog box, click the
Input Configuration

button.

A dialog box appears with a list of discrete inputs that you configured for
the Sequencer.
IMPORTANT

28

The following display for configuration has minor differences for

FactoryTalk View ME software.

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6. Check for each input that is tested for the step.

A value box defaults with a 0 for Off.
7. Click the value box to insert a 1 for On if the input must be 1 for the step
to complete.
8. Click the Output Configuration

button.

A dialog box appears with a list of outputs that you configured for the
Sequencer.

The symbol,
, in the left column of the dialog box conveniently shows
the inputs that are set up to qualify when set (1). The opposite symbol,
, indicates an input that qualifies when clear (0). Inputs with no
symbol are not tested.
See the Sequencer Faceplate Help on page 68 for a complete list of symbols
and descriptions.
9. Check for each output that is written for the step.
A value box defaults with a 0 for Off.
IMPORTANT

Any digital outputs not configured in a step remain at their

previous states.

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Rockwell Automation Sequencer Object (P_Seq)

10. Click the Analog Output Configuration

button.

A dialog box appears for configuring an analog output based on the

condition of the step.

11. Check for each analog output that is written for the step.
Unchecked outputs are left at the last value.
12. In the text box, type the setpoints or values per the step instruction.
A keypad appears to help you enter a value (as shown above).
13. Repeat step 2 through step 12 for each sequential step.

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Branch on Input
A branch dialog box lets you configure an input for a condition of a branch target
step. A special button appears on the Home Step Configuration dialog box when
based on input conditions is selected for the branch.
1. Click the branch button
IMPORTANT

A branch condition is evaluated only after the configured inputs

are qualified.

A dialog box appears with a list of inputs that you configured for the
Sequencer.

2. Check for each input that applies for the step.

A value box defaults with a 0 for Off.
3. Click the value box to insert a 1 if branching occurs when the input is 1.
4. Click the page advance
symbol in the lower, right corner to access
another Sequence Step Configuration dialog box.

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Multi-Step Configuration Dialog Box

IMPORTANT

The Multi-Step Configuration dialog box is available only in

FactoryTalk View SE software.

The Multi-Step Configuration dialog box provides an alternate means of

configuring timing, branching, pausing. holding, interlock and prompt options
for several steps at once.
1. On the Engineering tab (see page 20), click the Multiple Step Sequence
Configuration

button.

The Multi-Step Configuration dialog box appears.

2. Complete the Multi-Step Configuration dialog box.

Table 3 - Multi-Step Configuration Description

32

Topic

Description

Step Name

Type a name for the step.

IMPORTANT: Make sure to press Enter or click the
Page Down key after typing in a text box to save
your work.

Hold RS

Check for the sequence to restart from the last saved

step after a Held state.

Intlk FB

Check to have an interlock fall back to the last saved

step is this configuration is set up on the Engineering
tab.

Reset TO

Check to reset the sequence fault timer at the

beginning of the step.

Allow Pause

Check to let the sequence pause after this step.

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Table 3 - Multi-Step Configuration Description

Topic

Description

Oper Prompt

Check to use a prompt message for an operator to

take action. A Browse () button appears to
provide access to a Manual Prompt faceplate to
configure the specific prompt message.

Step Fault Time

Type a value (in milliseconds) for the Step Fault

Time. If the time to complete this step exceeds the
timer setting, a step timeout is triggered.

Step Wait Time

Type a value to have a step wait based on the

conditions of the next field.

Step Branching
Select

Leave blank to not use branching. Check to display

additional entry boxes for branching information.

Step

Type the number of the step to branch.

Cnt

Type a value for the number of loop counts in the

branch.
Branch until loop count is reached.
Branch is based on input conditions.
Branch is based on manual prompt.
Branch always.

3. Click the Input Configuration

button.

A dialog box appears with the input settings that you configured for the
Sequencer.

Discrete Inputs
Blank Box = Inputs State Not Checked in This Step

Symbol Points Up = Input Must be On to Qualify

Symbol Points Down = Input Must be Off to Qualify

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Rockwell Automation Sequencer Object (P_Seq)

The remainder of this document explains the codes and display elements that
comprise the P_Seq instruction.

Required Files

Controller File
The P_Seq_3_1-00_AOI.L5X Add-On Instruction must be imported into the
controller project to be used in the controller configuration. The service release
number (boldfaced) can change as service revisions are created.

Visualization Files
The following files for this Add-On Instruction can be downloaded from the
Product Compatibility and Download Center at
http://www.rockwellautomation.com/rockwellautomation/support/pcdc.page.
IMPORTANT

Files must be imported in the following order: image files, then global object
files, and then graphic files. This order is required to properly configure the
visualization files.

Table 4 - P_Seq Visualization File Types

Application Type

File Type FactoryTalk View SE Software

FactoryTalk View ME Software

Description

Graphics - Displays

GFX

(RA-BAS) Common-AnalogEdit

N/A

Faceplate used for analog input data entry. The

FactoryTalk View ME faceplates use the native
analog input data entry so no file is required.

(RA-Seq) P_Seq-Faceplate

(RA-Seq-ME) P_Seq-Faceplate
(RA-Seq-ME) P_Seq-Faceplate MaintenancePage3

The Sequence faceplate used for the object.

(RA-Seq) P_Seq-Help

(RA-Seq-ME) P_Seq-Help

Help information that is accessed from the

P_Seq faceplate.

(RA-Seq) P_Seq-Config

(RA-Seq-ME) P_Seq-Config Input

(RA-Seq-ME) P_Seq-Config Output
(RA-Seq-ME) P_Seq-Config Real

Faceplate used to configure the Sequencer

inputs and outputs.

(RA-Seq) P_Seq-Config-MultiStep

N/A

Faceplate used to show multi-step sequence

configuration.

(RA-Seq) P_Seq-Config-Step

(RA-Seq-ME) P_Seq-Config-Step
(RA-Seq-ME) P_Seq-Config-Step Real
(RA-Seq-ME) P_Seq-Config-Step-Confirm

Faceplate used to configure steps of a

sequence.

(RA-Seq) P_Seq-DeleteStep-Confirm

(RA-Seq-ME) P_Seq-DeleteStep-Confirm

Faceplate used to delete steps in a sequence.

(RA-Seq) P_Seq-InsertStep-Confirm

(RA-Seq-ME) P_Seq-InsertStep-Confirm

Faceplate used to insert steps in a sequence.

(RA-Seq) P_Seq-Detail

(RA-Seq-ME) P_Seq-Detail

Faceplate used to show Run Time Detail of a

sequence.

(RA-Seq) P_Seq-InputForce

(RA-Seq-ME) P_Seq-InputForce

Provides the ability to force a sequencer input

to qualify.

(RA-Seq) P_Seq-Quick

(RA-Seq-ME) P_Seq-Quick

The Quick display used for the object.

(RA-Seq) P_Seq-Test

(RA-Seq-ME) P_Seq-Test

Lets a developer test the sequence by

controlling the P_Seq inputs.

(RA-Seq) P_Seq-TimerForce

(RA-Seq-ME) P_Seq-TimerForce

Provides the ability to force a sequencer wait

timer to qualify.

(RA-BAS) P_Alarm-Faceplate

(RA-BAS-ME) P_Alarm-Faceplate

The alarm faceplate display used for object.

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Table 4 - P_Seq Visualization File Types

Application Type

File Type FactoryTalk View SE Software

FactoryTalk View ME Software

Description

Graphics - Displays
(continued)

GFX
(continue
d)

(RA-BAS) P_Alarm-Help

(RA-BAS-ME) P_Alarm-Help

P_Alarm Help information that is accessed

from the P_Seq Help faceplate.

(RA-BAS) P_Mode-Help

(RA-BAS-ME) P_Mode-Help

Mode Help information that is accessed from

the P_Seq Help faceplate.

(RA-BAS) P_Mode-Config

(RA-BAS-ME) P_Mode-Config

Message display used to set Default mode.

(RA-BAS) P_Intlk-Faceplate

(RA-BAS-ME) P_Intlk-Faceplate

The Interlock faceplate used for the object.

Use this file if your Sequencer Input has an
associated P_Intlk object and you enable
navigation to its faceplate from the Sequencer
Input faceplate.

(RA-BAS) P_IntlkPerm-Help

(RA-BAS-ME) P_IntlkPerm-Help

Interlock and Permissive Help information that

is accessed from the P_IntlkPerm Help
faceplate.
Use this file if you use the Sequencer Input
Interlock/Permissive faceplate.

(RA-BAS) P_Perm-Faceplate

(RA-BAS-ME) P_Perm-Faceplate

The Permissive faceplate used for the object.

Use this file if your Sequencer Input has an
associated P_Perm object and you enable
navigation to its faceplate from the Sequencer
Input faceplate.

(RA-UI) P_Prompt-Response

(RA-UI-ME) P_Prompt-Response

Display used to complete the operator prompt.

(RA-UI) P_Prompt-Select

(RA-UI-ME) P_Prompt-Select

Display used to select a prompt for the

sequence step.

(RA-UI) P_Prompt-Config

(RA-UI-ME) P_Prompt-Config

Display used to configure the prompt.

(RA-Seq) Standard Objects

(RA-Seq-ME) Standard Objects

Standard global objects used on Sequencer

displays.

(RA-BAS) Common Faceplate Objects

(RA-BAS-ME) Common Faceplate Objects

Common global objects used on all Process

Object faceplates.

(RA-BAS) Process Alarm Objects

(RA-BAS-ME) Process Alarm Objects

Global objects used for managing alarms on

Process Object faceplates.

(RA-BAS) Process Help Objects

(RA-BAS-ME) Process Help Objects

Global objects used for help on all Process

Objects help displays.

(RA-BAS) Process Interlock Objects

(RA-BAS-ME) Process Interlock Objects

Global objects used for managing interlocks

and permissives on Process Object faceplates.

(RA-BAS) Process Mode Objects

(RA-BAS-ME) Process Mode Objects

Common global objects used for managing

modes on Process Object faceplates.

(RA-UI) Prompt Objects

(RA-UI-ME) Prompt Objects

Global objects used for prompts.

Optional Graphic
Displays

Graphics - Global
Objects

GFX

GGFX

Graphics - Images

PNG

All .png files in the images folder

All .png files in the images folder

These are the common icons used in the global

objects and faceplates for all
Process Objects.
When PNG graphic formats are imported, they
are renamed like a BMP file but retain a PNG
format.

HMI Tags

CSV

N/A

FTVME_PlantPAxLib_Tags_3_1_00.csv(1)

These tags must be imported into the

FactoryTalk View ME project to support
switching tabs on any Process Object faceplate.

Macros

MCR

NavToObject

CfgStepBranch
CfgStepReal
CfgStepOutput
CfgStepInput
CfgStepHome

These macros must be imported into the

FactoryTalk View ME or SE project to support
faceplate-to-faceplate navigation by
tag name.

(1) The service release number (boldfaced) can change as service revisions are created.

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Rockwell Automation Sequencer Object (P_Seq)

This section describes the parameter references for this Add-On Instruction.

Controller Code

Sequencer Object InOut Structure

InOut parameters are used to link the Add-On Instruction to external tags that
contain necessary data for the instruction to operate. These external tags must be
of the data type shown.
InOut Parameters

Data Type

Description

Ref_Steps

P_SeqStep[2]

Tag containing a list of steps for this sequence. The array must contain 2500 steps.

Sequencer Object Input Structure

Input parameters include the following:
Input data elements (Inp_) are typically used to connect field inputs from
I/O modules or signals from other objects.
Configuration data elements (Cfg_) are used to set configurable
capabilities and features of the instruction.
Commands (PCmd_, OCmd_, MCmd_) are used by program logic,
operators, and maintenance personnel to request instruction actions.
Settings (PSet_, OSet_, MSet_) are used by program logic, operators, and
maintenance personnel to establish runtime setpoints, thresholds, and so
forth. A Setting (without a leading P, O, or M) establishes runtime settings
regardless of role or mode.
Table 5 - P_Seq Input Parameters
Input Parameter

Data
Type

EnableIn

BOOL

Inp_00Inp_31

BOOL

Inp_SeqLoopCnt

DINT

Number of times to execute entire sequence in a loop.

Inp_Started

BOOL

1 = External logic /equipment ready for sequence to execute.

Inp_Branch

BOOL

1 = Sequence branches if configured to do so on input.

0 = Don't branch.

Inp_PermOK

BOOL

1 = Permissives and non-bypassable Permissives OK, sequence can start.

Inp_NBPermOK

BOOL

Inp_IntlkOK

BOOL

Inp_NBIntlkOK

BOOL

36

Alias For

Default

Description

Ladder Diagram:
If the rung-in condition is true, the instructions Logic routine executes. If the
rung-in condition is false, the instructions EnableInFalse routine executes.
Function Block Diagram:
If true, or not connected, the instructions Logic routine executes. If the
parameter is exposed as a pin and wired, and the pin is false, the instructions
EnableInFalse routine executes.
Structured Text:
No effect. The instructions Logic routine executes.

Wrk_Inputs.0Wrk_Inputs.31 All bits 0

Sequencer input bits.

1 = Interlocks and non-bypassable Interlocks OK, sequence can start/run.

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Table 5 - P_Seq Input Parameters

Input Parameter

Data
Type

Alias For

Default

Description

Inp_Reset

BOOL

Input parameter used to programatically reset alarms. When set to 1, all fault
conditions and latched alarms are reset.

Inp_PromptCfm

BOOL

1 = Manual prompt has received Operator confirmation.

Inp_PromptRdy

BOOL

1 = Manual prompt has been posted to Operator.

Inp_PromptSelect

DINT

Cfg_HasInp

Optional input for the P_Prompt instruction. Select option value.

All bits 0

Bits = 1 are inputs configured to exist (engineering).

All bits 1

Bits = 1 are inputs configured to be used (maintenance).

Cfg_InpForceMask

All bits 0

Bits = 1 are inputs available to be forced by maintenance.

Cfg_OutTrackMask

All bits 1

Bits = 1 are Boolean outputs set for tracking when sequence not writing to
them.

Cfg_OutRealTrackMask

All bits 1

Bits = 1 are REAL outputs set for tracking when sequence not writing to them.

Cfg_ScaleRealOut

All bits 0

Bits = 1 are REAL outputs that are scaled quantities.

Cfg_HoldOutState

All bits 0

State of outputs written on hold.

Cfg_UseInp

DINT

Cfg_StopOutState

States of outputs written on hold or on stop.

Cfg_HoldOutMask

All bits 0

Which outputs to write on hold or on stop.

All bits 0

Which Real outputs to write on hold or on stop.

Interlock trip action (enumeration):

0 = Stop
1 = Hold
2 = Go to Intlk Step

Step fault timer done action (enumeration):

0 = Alarm/Status only
1 = Hold

Quantity input lower limit. See page 64 for details.

100

Quantity input upper limit.

Cfg_StopOutMask
Cfg_HoldOutRealMask
Cfg_StopOutRealMask
Cfg_IntlkTripAction

SINT

Cfg_StepFTmrDNAction

Cfg_QtyMin

INT

Cfg_QtyMax
Cfg_StdQty

Quantity input nominal value (100% run).

Cfg_SeqTO

DINT

Sequence timeout time (ms).

Cfg_HasPrompt

BOOL

1 = This sequence has an associated manual prompt object.

Cfg_HasPermObj

1 = Tells HMI a Permissive object (for example, P_Perm) is used for Inp_PermOK
and navigation to the permissive objects faceplate is enabled.
IMPORTANT: The name of the Permissive object in the controller must be this
object's name with the suffix _Perm. For example, if your P_Seq object has the
name Seq123, then its Permissive object must be named Seq123_Perm.

Cfg_HasIntlkObj

1 = Tells HMI an interlock object (for example, P_Intlk) is used for Inp_IntlkOK
and navigation to the interlock objects faceplate is enabled.
IMPORTANT: The name of the Interlock object in the controller must be this
object's name with the suffix _Intlk. For example, if your P_Seq object has the
name Seq123, then its Interlock object must be named Seq123_Intlk.

When this parameter is 1, program commands are cleared once they are acted
upon. When set to 0, program commands remain set until cleared by the
application program logic.
IMPORTANT: Clearing this parameter online can cause unintended program
command execution.

Cfg_PCmdClear

Mode.Cfg_PCmdClear

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Table 5 - P_Seq Input Parameters

Input Parameter

Data
Type

Alias For

Cfg_ProgDefault

BOOL

Mode.Cfg_ProgDefault

Cfg_HasStepTOAlm

BOOL

StepTO.Cfg_Exists

Cfg_HasSeqTOAlm

SeqTO.Cfg_Exists

Cfg_HasIntlkTripAlm

IntlkTrip.Cfg_Exists

Cfg_StepTOResetReqd

BOOL

StepTO.Cfg_ResetReqd

Cfg_SeqTOResetReqd

SeqTO.Cfg_ResetReqd

Cfg_IntlkTripResetReqd

IntlkTrip.Cfg_ResetReqd

Cfg_StepTOAckReqd

BOOL

StepTO.Cfg_AckReqd

Cfg_SeqTOAckReqd

SeqTO.Cfg_AckReqd

Cfg_IntlkTripAckReqd

IntlkTrip.Cfg_AckReqd

Cfg_SeqTOSeverity

INT

SeqTO.Cfg_Severity

Cfg_StepTOSeverity

StepTO.Cfg_Severity

Cfg_IntlkTripSeverity

IntlkTrip.Cfg_Severity

Default

Description
This parameter defines the default mode. When this parameter is 1, the mode
defaults to Program if no mode is being requested. When this parameter is 0,
the mode defaults to Operator if no mode is being requested.
IMPORTANT: Changing this parameter online can cause unintended mode
changes.

These parameters determine whether the corresponding alarm exists and is

checked or if the alarm does not exist and is not used. When this parameter is 1,
the corresponding alarm exists.

These parameters determine whether a reset is required to clear the alarm

status. When these parameters are 1, the alarm is latched ON when the alarm
occurs. After the alarm condition returns to normal, a reset is required to clear
the alarm status (for example, OCmd_Reset, Inp_Reset, or
EqpFault.OCmd_Reset are required to clear Alm_EqpFault alarm after the alarm
is set and the equipment returns to normal).
When this parameter is 0, no reset is required and the alarm status is cleared
when the alarm condition returns to normal.
IMPORTANT: If the reset clears the alarm, it also acknowledges the alarm.

These parameters determine whether an acknowledgement is required for an

alarm. When these parameters are 1, the acknowledge (ack) bit is cleared when
the alarm occurs. An acknowledge command (for example, PCmd_EqpFaultAck
or EqpFault.OCmd_Ack) is required to acknowledge the alarm. When set to 0,
the Acknowledge bit is set when an alarm occurs indicating an acknowledged
alarm and no acknowledge command is required.

750

These parameters determine the severity of each alarm. This drives the color and
symbols that are used to indicate alarm status on the faceplate and global
object.
The following are valid values:
1250 = Low
251500 = Medium
501750 = High
7511000 = Urgent
IMPORTANT: For FactoryTalk View software version 7.0, these severity
parameters drive only the indication on the global object and faceplate. The
Alarms & Events definition severity drives the color and symbol that is used on
the alarm banner and alarm summary as well as the value returned by
FactoryTalk Alarms & Events display commands.

500

PSet_Owner

DINT

Program owner request ID (non-zero) or release (zero).

PSet_Qty

INT

100

Program quantity input value.

100

Operator quantity input value.

Maintenance setting to execute single step only:

0 = Normal
1 = Single step

OSet_Qty
MSet_SingleStep

BOOL

PCmd_SeqStart

BOOL

Wrk_SMProgCmd.0

PCmd_SeqHold

Wrk_SMProgCmd.6

PCmd_SeqRestart

Wrk_SMProgCmd.7

PCmd_SeqStop

Wrk_SMProgCmd.2

PCmd_SeqReset

Wrk_SMProgCmd.3

38

Set PCmd_SeqStart to 1 to start the sequence

Set PCmd_SeqHold to 1 to hold the sequence
Set PCmd_SeqRestart to 1 to restart the sequence
Set PCmd_SeqStop to 1 to stop the sequence
Set PCmd_SeqReset to 1 to reset the sequence
In Operator Mode and Maintenance mode, these parameters are ignored and
cleared
In Program mode, these parameters are buffered and cleared once processed
Cfg_PCmdClear does not affect these parameters

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Table 5 - P_Seq Input Parameters

Input Parameter

Data
Type

Alias For

Default

Description

PCmd_Acq

BOOL

Mode.PCmd_Acq

When Cfg_PCmdClear is 1:
Set PCmd_Acq to 1 to Acquire
Set PCmd_Rel to 1 to Release
These parameters reset automatically
When Cfg_PCmdClear is 0:
Set PCmd_Acq to 1 to Acquire
Set PCmd_Acq to 0 to Release
PCmd_Rel is not used
These parameters do not reset automatically

When Cfg_PCmdClear is 1:
Set PCmd_Lock to 1 to Lock
Set PCmd_Unlock to 1 to Unlock
These parameters reset automatically
When Cfg_PCmdClear is 0:
Set PCmd_Lock to 1 to Lock
Set PCmd_Lock to 0 to Unlock
PCmd_Unlock is not used
These parameters do not reset automatically

Set PCmd_Reset to 1 to reset all alarms requiring reset

This parameter is always reset automatically

Set PCmd_<Alarm>Ack to 1 to Acknowledge alarm

The parameter is reset automatically

When Cfg_PCmdClear is 1:
Set PCmd_<Alarm>Suppress to 1 to suppress alarm
Set PCmd_<Alarm>Unsuppress to 1 to unsuppress alarm
These parameters reset automatically
When Cfg_PCmdClear is 0:
Set PCmd_<Alarm>Suppress to 1 to suppress alarm
Set PCmd_<Alarm>Suppress to 0 to unsuppress alarm
PCmd_<Alarm>Unsuppress is not used
These parameters do not reset automatically

PCmd_Rel

PCmd_Lock

Mode.PCmd_Rel

BOOL

PCmd_Unlock

Mode.PCmd_Lock
Mode.PCmd_Unlock

PCmd_Reset

BOOL

PCmd_StepTOAck

BOOL

StepTO.PCmd_Ack

PCmd_SeqTOAck

SeqTO.PCmd_Ack

PCmd_IntlkTripAck

IntlkTrip.PCmd_Ack

PCmd_StepTOSuppress

BOOL

StepTO.PCmd_Suppress

PCmd_SeqTOSuppress

SeqTO.PCmd_Suppress

PCmd_IntlkTripSuppress

IntlkTrip.PCmd_Suppress

PCmd_StepTOUnsuppress

BOOL

StepTO.PCmd_Unsuppress

PCmd_SeqTOUnsuppress

SeqTO.PCmd_Unsuppress

PCmd_IntlkTripUnsuppress

IntlkTrip.PCmd_Unsuppress

PCmd_SeqTOUnshelve

BOOL

SeqTO.PCmd_Unshelve

PCmd_StepTOUnshelve

StepTO.PCmd_Unshelve

PCmd_IntlkTripUnshelve

IntlkTrip.PCmd_Unshelve

OCmd_SeqStart

BOOL

Wrk_SMOperCmd.0

OCmd_SeqHold

Wrk_SMOperCmd.6

OCmd_SeqRestart

Wrk_SMOperCmd.7

OCmd_SeqStop

Wrk_SMOperCmd.2

OCmd_SeqReset

Wrk_SMOperCmd.3

OCmd_SeqPause

Wrk_PauseBits.0

OCmd_SeqResume

Wrk_PauseBits.1

OCmd_SeqAutoPause

Wrk_PauseBits.2

OCmd_SeqCancelPause

Wrk_PauseBits.3

Set PCmd_<Alarm>Unshelve to 1 to Unshelve alarm

The parameter is reset automatically

Operator command to start, hold, restart, stop, reset, pause, resume, autopause, or cancel auto-pause sequence.

OCmd_StdQtyReset

BOOL

Operator Command to reset OSet_Qty to Standard quantity (Cfg_StdQty).

MCmd_InpForce

DINT

All bits 0

Maintenance command (per bit) to force input for current step.

MCmd_TimerForce

BOOL

Maintenance command to force Step Timer done for current step.

MCmd_SeqStepForce

Maintenance command to force transition out of current step.

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Table 5 - P_Seq Input Parameters

Input Parameter

Data
Type

OCmd_Bypass

BOOL

Alias For

Default

Description

Operator command to bypass Interlocks and Permissives.

OCmd_Check

Operator command to check (not bypass) all Interlocks and Permissives.

MCmd_Acq

BOOL

Mode.MCmd_Acq

Maintenance command to acquire ownership (Operator/Program/Override to

Maintenance).

MCmd_Rel

BOOL

Mode.MCmd_Rel

Maintenance command to release ownership (Maintenance to Operator/

Program/Override).

OCmd_AcqLock

BOOL

Mode.OCmd_AcqLock

Operator command to acquire (program to operator)/lock ownership.

OCmd_UnlockRel

BOOL

Mode.OCmd_UnlockRel

Operator command to unlock/release (operator to program) ownership.

OCmd_Reset

BOOL

Operator command to reset all alarms requiring reset.

OCmd_ResetAckAll

Operator command to reset all alarms and latched shed conditions

Sequencer Object Output Structure

Output parameters include the following:
Output data elements (Out_) are the primary outputs of the instruction,
typically used by hardware output modules; however they can be used by
other application logic.
Value data elements (Val_) are numeric outputs of the instruction for use
by the HMI. Values also can be used by other application logic or software
packages.
Status data elements (Sts_) are bit outputs of the instruction for use by the
HMI. Status bits also can be used by other application logic.
Error data elements (Err_) are outputs of the instruction that indicate a
particular configuration error. If any Err_ bit is set, then the Sts_Err
configuration error summary status is set and the Invalid Configuration
indicator is displayed on the HMI.
Not Ready data elements (Nrdy_) are bit outputs of the instruction for use
by the HMI for displaying the Device Not Ready indicator. Status bits can
also be used by other application logic.
Alarm data elements (Alm_) are outputs of the instruction that indicate a
particular alarm has occurred.
Acknowledge data elements (Ack_) are outputs of the instruction that
indicate the corresponding alarm has been acknowledged.
Ready data elements (Rdy_) are bit outputs of the instruction used by the
HMI to enable or disable Command buttons and Setting entry fields.
Table 6 - P_Seq Output Parameters
Output Parameter

Data Type

EnableOut

BOOL

Out_00Out_31

BOOL

Wrk_Out.0Wrk_Out.31

32 Sequencer output bits.

Out_Real_00Out_Real_31

REAL

Wrk_ROut[0]Wrk_ROut[31]

32 Sequencer output REAL values.

40

Alias For

Description
Enable Output: The EnableOut signal is not manipulated by this instruction. Its output
state always reflects EnableIn Input state.

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Table 6 - P_Seq Output Parameters

Output Parameter

Data Type

Alias For

Out_PromptReq

BOOL

Request to post manual prompt to Operator.

Out_PromptRef

DINT

Link to which manual prompt (in array).

Val_Qty

INT

Accepted quantity value.

Val_QtyPct

REAL

Quantity as a percent of nominal quantity.

Val_MaxStepIndex

DINT

Maximum allowed Step Index (= size of Ref_Steps array - 1).

Val_CurrStepNum

Currently running step.

Val_SeqLoopCnt
Val_InSeqDay

Description

Wrk_SeqLoopCnt
SINT

Number of sequence loops completed.

Time since sequence was started: days in ddd hh:mm:ss.

Val_InSeqHrs

Time since sequence was started: hours in ddd hh:mm:ss.

Val_InSeqMin

Time since sequence was started: minutes in ddd hh:mm:ss.

Val_InSeqSec

Time since sequence was started: seconds in ddd hh:mm:ss.

Val_InSeqACC

DINT

Val_InSeqTOPct

SINT

Wrk_InSeqT.ACC

Time in Sequence Timer Accumulator (ms).

Percentage of elapsed time to Sequence Timeout (for bar graph).

Val_InStepHrs

Time in this step: hours in hh:mm:ss.

Val_InStepMin

Time in this step: minutes in hh:mm:ss.

Val_InStepSec

Time in this step: seconds in hh:mm:ss.

Val_InStepACC

DINT

Val_InStepTOPct

SINT

Wrk_InStepT.ACC

Time In Step Timer Accumulator (ms).

Percentage of elapsed time to Sequence Timeout (for bar graph).

Val_StepTRemainHrs

Step time remaining: hours in hh:mm:ss.

Val_StepTRemainMin

Step time remaining: minutes in hh:mm:ss.

Val_StepTRemainSec

Step time remaining: seconds in hh:mm:ss.

Val_StepTRemain

DINT

Remaining time in milliseconds before transition is allowed.

Val_State

DINT

Sequence state (enumeration):

0 = Idle
1 = Starting
2 = Running
3 = Complete
4 = Stopped
5 = Held

Val_Mode

SINT

Val_Owner

DINT

Mode.Val

The current mode is shown with status bits and also as an enumeration Val_Mode as
follows:
0 = No mode
2 = Maintenance
4 = Program (locked)
5 = Operator (locked)
6 = Program (unlocked, Operator is default)
7 = Operator (unlocked, Program is default)
8 = Program (unlocked, Program is default)
9 = Operator (unlocked, Operator is default)
Current Object Owner ID (0 = not owned).

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Table 6 - P_Seq Output Parameters

Output Parameter

Data Type

Val_Notify

SINT

Sts_SeqIdle

BOOL

Alias For

Current alarm level and acknowledgement (enumeration):

0 = No alarm
1 = Alarm cleared: a reset or acknowledge is required
2 = Low (acknowledged)
3 = Low (unacknowledged)
4 = Medium (acknowledged)
5 = Medium (unacknowledged)
6 = High (acknowledged)
7 = High (unacknowledged)
8 = Urgent (acknowledged)
9 = Urgent (unacknowledged)
Wrk_SMState.0

Sts_SeqStarting

Wrk_SMState.1

Sts_SeqRunning

Wrk_SMState.2

Sts_SeqHeld

Wrk_SMState.5

Sts_SeqComplete

Wrk_SMState.3

Sts_SeqStopped

Wrk_SMState.4

Sts_SeqPaused

Wrk_PauseBits.9

Sts_SeqExecuting
Sts_InpForced

1 = Sequence is idle, starting, running, held, complete, stopped, or paused.

1 = Starting, Running, or Holding.

DINT

Bits = 1 are forced by Maintenance.

Sts_Qualified
Sts_TQualified

Description

Bits = 1 are qualified (in required state for transition).

BOOL

1 = Timer qualified in step.

Sts_MQualified

1 = Manual prompt qualified in step.

Sts_Err

1 = Error in configuration: See detail bits for reason.

Err_Alarm

1 = Error in configuration: Alarm minimum on time, shelf time, severity.

Err_StepSizeFault

1 = Configured number of steps exceeds size of step array.

Err_QtyCfg

Quantity configuration error.

Err_Qty

Quantity input error.

Sts_Available

1 = Sequence available for control by automation (Program).

Sts_Bypass

BOOL

1 = Bypassable Interlocks and Permissives are bypassed.

Sts_BypActive

BOOL

1 = Bypassing active (Bypassed or Maintenance).

Sts_NotRdy

BOOL

1 = Sequence is not ready to run (independent of mode).

Nrdy_CfgErr

BOOL

1 = Device Not Ready:

Configuration Error
Interlock Not OK
Permissive Not OK
Device Logic Disabled/NO Mode

Sts_MaintByp

BOOL

1 = A maintenance bypass is active, display icon.

Nrdy_Intlk
Nrdy_Perm
Nrdy_NoMode

Sts_AlmInh

BOOL

Sts_Maint

BOOL

Mode.Sts_Maint

1 = Mode is Maintenance (supersedes Override, Program, Operator).

Sts_Prog

BOOL

Mode.Sts_Prog

1 = Mode is Program.

Sts_Oper

BOOL

Mode.Sts_Oper

1 = Mode is Operator.

Sts_ProgOperLock

BOOL

Mode.Sts_ProgOperLock

1 = Program or Operator has requested mode lock.

42

1 = An alarm is shelved, disabled or suppressed, display icon.

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Table 6 - P_Seq Output Parameters

Output Parameter

Data Type

Alias For

Description

Sts_NoMode

BOOL

Mode.Sts_NoMode

1 = Mode is No Mode (no owner, disabled, or not scanned).

Sts_MAcqRcvd

BOOL

Mode.Sts_MAcqRcvd

1 = Maintenance Acquire command received this scan.

Sts_StepTO

BOOL

StepTO.Inp

1 = Step Timeout, Sequence Timeout, or sequence stopped by an Interlock NOT OK

status.

Sts_SeqTO

SeqTO.Inp

Sts_IntlkTrip

IntlkTrip.Inp

Alm_StepTO

BOOL

StepTO.Alm

Alm_SeqTO

SeqTO.Alm

Alm_IntlkTrip

IntlkTrip.Alm

Ack_StepTO

BOOL

StepTO.Ack

Ack_SeqTO

SeqTO.Ack

Ack_IntlkTrip

IntlkTrip.Ack

Sts_StepTODisabled

BOOL

StepTO.Disabled

Sts_SeqTODisabled

SeqTO.Disabled

Sts_IntlkTripDisabled

IntlkTrip.Disabled

Sts_StepTOShelved

BOOL

StepTO.Shelved

Sts_SeqTOShelved

SeqTO.Shelved

Sts_IntlkTripShelved

IntlkTrip.Shelved

Sts_StepTOSuppressed

BOOL

StepTO.Suppressed

Sts_SeqTOSuppressed

SeqTO.Suppressed

Sts_IntlkTripSuppressed

IntlkTrip.Suppressed

Rdy_SeqStart

1 = Step Timeout, Sequence Timeout, or sequence stopped by an Interlock NOT OK

alarm.

1 = Step Timeout alarm, Sequence Timeout alarm, or Interlock Trip alarm has been
acknowledged.

1 = Step Timeout alarm, Sequence Timeout alarm, or Interlock Trip alarm has been
disabled by Maintenance (inhibits new alarm).

1 = Step Timeout alarm, Sequence Timeout alarm, or Interlock Trip alarm has been
shelved by Operator (inhibits new alarm).

1 = Step Timeout alarm, Sequence Timeout alarm, or Interlock Trip alarm has been
suppressed by Program logic (inhibits new alarm).

BOOL

1 = Ready to receive:
OCmd_SeqStart
OCmd_SeqHold
OCmd_SeqRestart
OCmd_SeqStop
OCmd_SeqReset
OCmd_SeqPause
OCmd_SeqResume
OCmd_SeqAutoPause
OCmd_SeqCancelPause
OCmd_SeqStepForce
each of the above enables the corresponding HMI button.

DINT

Bits = 1 = Ready to receive manual commands to masked-off bit outputs.

Rdy_SeqHold
Rdy_SeqRestart
Rdy_SeqStop
Rdy_SeqReset
Rdy_SeqPause
Rdy_SeqResume
Rdy_SeqAutoPause
Rdy_SeqCancelPause
Rdy_SeqStepForce
Rdy_Output
Rdy_RealOutput

Bits = 1 = Ready to receive manual entries to masked-off REAL outputs.

Rdy_Qty

BOOL

1 = Ready to receive OSet_Qty.

Rdy_StdQtyReset

BOOL

1 = Ready to receive OCmd_StdQtyReset, OCmd_Bypass, or OCmd_Check (enables

HMI button).

Rdy_Reset

BOOL

1 = At least one alarm or latched shed requires reset.

Rdy_ResetAckAll

BOOL

1 = At least one alarm requires reset or acknowledgement.

P_Seq

BOOL

Unique parameter name for auto -discovery.

Rdy_Bypass
Rdy_Check

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Sequencer Object Local Configuration Tags

Configuration parameters that are arrayed, string, or structure data types cannot
be configured as parameters for Add-On Instructions. Configuration parameters
of these types appear as local tags to the Add-On Instruction. Local tags can be
configured through the HMI faceplates or in RSLogix 5000 software by
opening the instruction logic of the Add-On Instruction instance and then
opening the Data Monitor on a local tag. These parameters cannot be modified
by using controller logic or RSLogix 5000 software export/import functionality.
Tag Name

Data Type

Default

Description

Cfg_Desc

STRING_40

' Simple Sequencer'

Description for display on HMI. This string is shown in the title bar of the faceplate.

Cfg_HasInpNav

DINT

2#0000_0000_0000 Bits = 1= Corresponding input navigation is enabled.

_0000_0000_0000
_0000_0000

Cfg_HoldOutRealValue

REAL[32]

All values = 0.0

Values of the REAL outputs when the sequence is held.

Cfg_InpName

STRING_20[32]

All strings null

Text of the input names.

Cfg_InpNavTag

STRING_20[32]

Cfg_Label

STRING_20

' Simple Sequencer'

Label for graphic symbol displayed on HMI. This string appears on the graphic symbol.

Cfg_OutName

STRING_20[32]

All strings null

Text of the output names.

Cfg_OutRealName

STRING_20[32]

Cfg_QtyEU

STRING_8

'%'

Engineering units text for Quantity.

Cfg_StopOutRealValue

REAL[32]

All values = 0.0

Values of the REAL outputs when the sequence is stopped.

Cfg_Tag

STRING_20

'P_Seq'

Tag name displayed on HMI. This string is shown in the title bar of the faceplate.

44

Tag name for destination of input navigation buttons.

Text names of the REAL outputs for setpoints or parameter values.

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Operations

This section describes the primary operations for Add-On Instructions.

Modes
The P_Seq Add-On Instruction uses the following standard modes,
implemented by using an embedded P_Mode Add-On Instruction.
Graphic Symbol

Description

Operator mode

Control of the sequence is owned by the Operator. Operator Commands (OCmd_) and
Operator Settings (OSet_) from the HMI are accepted.

Program mode

Control of the sequence is owned by Program logic. Program Commands (PCmd_) and
Program Settings (PSet_) are accepted.

Maintenance mode

Control of the sequence is owned by Maintenance. Operator Commands and Settings

from the HMI are accepted. Bypassable interlocks and permissives are bypassed.

No mode

The sequence is disabled and has no owner because the EnableIn input is false. The main
instruction Logic routine is not being scanned. See Execution for more information on
EnableInFalse processing.

The Hand and Override (ovrd) modes are not used. (These modes are typically
used by the controlled equipment.)
Refer to the Rockwell Automation Library of Process Objects: Common Mode
Block (P_Mode) Reference Manual, publication SYSLIB-RM005, for
more information.

Alarms
The P_Seq instruction uses the following alarms, implemented by using
embedded P_Alarm Add-On Instructions.
Alarm

P_Alarm Name

Description

Interlock Trip

IntlkTrip

Alarm triggers if an Interlock Trip occurs.

Sequence Timeout

SeqTO

Alarm if sequence time exceeds the sequence timeout value.

Step Timeout

StepTO

Alarm triggers if the step time exceeds the step timeout value.

Parameters of the P_Alarm object can be accessed by using the following

convention: [P_Alarm Name].[P_Alarm Parameter].
See Rockwell Automation Library of Process Objects: Common Alarm Block
(P_Alarm) Reference Manual, publication SYSLIB-RM002 for more
information.

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Simulation
The P_Seq Add-On Instruction does not have a Simulation capability.

Execution
This table explains the handling of instruction execution conditions.
Condition

Description

EnableIn False (false rung)

Mode is set to No Mode. Outputs are left in their last state, and are not
being written. Received commands are ignored and cleared.

Powerup (prescan, first scan)

Sequencer is flagged to initialize on first scan. On first scan, the sequence

is set to the Idle state and the edit pointer (for online sequence editing
HMI displays) is set to step 1 of the sequence.

Postscan (SFC Transition)

No SFC postscan logic is provided.

Refer to the Logix5000 Controllers Add-On Instructions Programming Manual,

publication 1756-PM010, for more information.

Display Element

Display Element Name

GO_P_SequenceDisplayWidget

46

A display element (global object) is created once and can be referenced multiple
times on multiple displays in an application. When changes are made to the
original (base) object, the instantiated copies (reference objects) are
automatically updated. Use of global objects, in conjunction with tag structures
in the ControlLogix system, aid consistency and save engineering time.
Display Element

Description
Standard sequence display global object.

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Status/Quality Indicators
One of these symbols appears to the left of the graphic symbol when the
described condition is true.
Graphic Symbol

Description
Invalid configuration
Device not ready
Operator attention: prompt posted and operator
response required

No symbol displayed

TIP

I/O communication OK and configuration valid

When the Invalid Configuration indicator appears, you can find what
configuration setting is invalid by following the indicators. Open the faceplate.
The Invalid Configuration indicator appears next to the appropriate tab at the
top of the faceplate to guide you in finding the configuration error. Once you
navigate to the tab, the misconfigured item is flagged with this indicator or
appears in a magenta box.

The Invalid Configuration indicator appears under any of the

following conditions:
The alarm severity for Interlock Trip, Step Timeout or Sequence Timeout
is set to a value less than 1 or greater than 1000
An alarm has an invalid minimum On time or an invalid Shelf Time (must
be 02,147,483 seconds)
The configured minimum quantity (Cfg_QtyMin) or maximum quantity
(Cfg_QtyMax) is negative
The configured standard quantity (Cfg_StdQty) is less than the minimum
quantity or greater than the maximum quantity
The entered quantity value (PSet_Qty or OSet_Qty) is less than the
minimum quantity or greater than the maximum quantity
TIP

When the Not Ready indicator appears, you can find what condition is
preventing operation by following the indicators. Click the graphic symbol to
open the faceplate. The Not Ready indicator appears next to the appropriate
tab at the top of the faceplate to guide you in finding the condition. When you
navigate to the tab, the condition preventing operation is flagged.

The Device Not Ready indicator appears under any of the following conditions:
There is a configuration error.
An Interlock or Permissive is not OK.
Device logic is disabled or there is no mode.

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Maintenance Bypass Indicator

This symbol appears to the right of the label to indicate that a Maintenance
bypass has been activated.
Graphic Symbol

Description
A Maintenance bypass is active

No symbol displayed

TIP

No Maintenance bypass active

When the Maintenance Bypass indicator appears, you can find what condition
was bypassed by following the indicators. Click the graphic symbol to open the
faceplate. The Maintenance Bypass indicator appears next to the appropriate
tab at the top of the faceplate to guide you in finding the bypass. Once you
navigate to the tab, the bypassed item is flagged with this indicator.

The Maintenance Bypass indicator appears under any of the

following conditions:
Interlocks and permissives are bypassed (from the Maintenance tab of the
main faceplate)
An input that is configured to exist (Cfg_HasInp.xx = 1) by engineering is
configured to not be used (Cfg_UseInp.xx = 0) by maintenance

Mode Indicators
One of these symbols appears to the right of the graphic symbol to indicate the
mode of the object instruction.
Graphic Symbol

Description

Transparent

Operator mode (if the default mode is Operator and in Operator mode, the mode indicator
is transparent)
Operator
Operator locked, program cannot acquire

Transparent

Program mode (if the default mode is Program and in Program mode, the mode indicator is
transparent)
Program
Program locked, operator cannot acquire
Maintenance
No mode

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The images provided for the operator and program default modes are
completely transparent; therefore, no mode indicators appear if the device is in
its default mode. This behavior can be changed by replacing these mode
indicators with images that are not completely transparent.

TIP

Alarm Indicators
One of these symbols appears to the left of the Label to indicate the described
alarm condition. The alarm border and label background blink if
Acknowledgement of an alarm condition is required.
Symbol

No symbol

Border and Label Background

Description

No change in color

Alarm Inhibit: an alarm is suppressed by the Program,

disabled by Maintenance, or shelved by the Operator.

White

Return to normal (no alarm condition), but a previous

alarm has not been acknowledged.

Blue

Low severity alarm.

Yellow

Medium severity alarm.

Red

High severity alarm.

Magenta

Urgent severity alarm.

No change in color

No alarm or alarm inhibit condition, and all alarms

are acknowledged.

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Using Display Elements

The global objects for P_Seq can be found in the global object file (RA-Seq)
Standard Objects.ggfx. Follow these steps to use a global object.
1. Copy the global object from the global object file and paste it in the
display file.

2. In the display, right-click the global object and choose Global Object
Parameter Values.
The Global Object Parameter Values dialog box appears.

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The global object parameters are as follows.

Parameter

Required

Description

#102

Object tag to point to the name of the associated object

Add-On Instruction in the controller.

#103

Path used for display navigation features to other objects. Include

program scope if tag is a program scope tag.
For example, [CLX_Slot2]Program:Heater_Seq.

#120

Additional parameter to pass to the display command to open the

faceplate. Typically used to define position for the faceplate.

#121

Additional parameter to pass to the display command to open the

faceplate. if defining X and Y coordinate, separate parameters so that
X is defined by #120 and Y is defined by #121. This lets these same
parameters to be used in subsequent display commands originating
from the faceplate.

#122

These are the options for the global object display:

0 = Always show faceplate
1 = Show Quick Display for users without Maintenance access (Code C)
2= Always show Quick Display

3. In the Value column, type the tag or value as specified in the Description
column.
TIP

Click the ellipsis (. . .) to browse and select a tag.

Values for items marked (optional) can be left blank.

4. Click OK.

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Quick Display

The Quick Display screen provides means for operators to perform simple
interactions with the P_Seq instruction instance. From the Quick Display,
you can navigate to the faceplate for full access for operation, maintenance,
and configuration.

Click to Navigate to Full

Faceplate

Faceplate

The P_Seq faceplate consists of five tabs and each tab consists of one or more
pages.
The title bar of each faceplate contains the value of local configuration tags
Cfg_Tag and Cfg_Desc.

The Operator tab is displayed when the faceplate is initially opened.

Maintenance

Operator

Exit

Diagnostics

Engineering

Alarms

Help

The faceplate provides the means for operators, maintenance personnel,

engineers, and others to interact with the P_Seq instruction instance. When a
given input is restricted via Factory Talk View security, the required user security
code letter is shown in the tables.

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Operator Tab
The faceplate initially opens to the Operator (Home) tab. From here, an
operator can monitor the sequence status or access a detail screen via the
magnifying glass button.
The Operator tab shows the following information:
Current mode
What step the sequence is waiting on and how much time remains
Manual prompt attention
Current time in step and time in sequence

Mode Indicator
Reset and Acknowledge All
Alarms Command Button

Current Sequence
State

Sequence Control Buttons

Manual Prompt

Run Time Detail Button

Current Step and

Time Values

Sequence Control
Buttons

Pause Management Buttons

The following table shows the functions included on the Operator tab.
Table 7 - Operator Tab Descriptions
Function

Action

Security Required

Click to lock Operator mode.

Manual Device Operation

(Code B)

Click to release Operator mode.

Click to request Program mode.

Click to request Operator mode.

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Table 7 - Operator Tab Descriptions

Function

Action

Security Required

Click to reset and acknowledge all alarms.

Waiting For:

Displays the step number, name, time, and

the conditions that the sequence is waiting
to qualify.

Sequence State Indicator

Displays the current sequence state.

Click to start a sequence.

Click to stop a sequence.

Normal Production
(Batches & Lots)
(Code J)

Process Exception
Handling, Advanced
Production (Code M)

Click to reset a sequence.

Click to respond to a prompt if configured

for a step.

None

Click to open the Permissive faceplate.

The Permissive status symbol becomes a
button to open the Permissive faceplate if
the P_Seq instruction is configured to have
an associated P_Perm instruction.
Click to open the Interlock faceplate.
The Interlock status symbol becomes a
button to open the Interlock faceplate if the
P_Seq instruction is configured to have an
associated P_Intlk instruction.
Click to open the Run Time Detail faceplate.

Current Step #

Displays the sequence number and name of

the current step.

Time in Step

Displays the elapsed time for the current

step.

Time in Sequence

Displays the elapsed time for the sequence.

None

Click to hold a sequence.

Normal Production
(Batches & Lots)
(Code J)

Click to restart a sequence.

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Table 7 - Operator Tab Descriptions

Function

Action

Security Required

Click to resume a paused sequence.

Process Exception
Handling, Advanced
Production (Code M)

Click to request a sequence to pause at the

next pause point.

Click to automatically request a sequence to

pause at each pause point.

Click to cancel a pause or automatic pause

request.

If the object is configured to have permissive and interlock objects (for example,
Cfg_HasIntlkObj and Cfg_HasPermObj are true), the permissive and interlock
indication become buttons. These buttons open the faceplates of the source
objects used as a permissive or interlock (often this is a P_Intlk interlock object or
a P_Perm permissive object). If the object is not configured in this way, the
permissive and interlock are indicators only.
Refer to these publications for more information:
Rockwell Automation Library of Process Objects: Interlock with First Out
and Bypass (P_Intlk) Reference Manual, publication SYSLIB-RM004
Rockwell Automation Library of Process Objects: Permissives with Bypass
(P_Perm) Reference Manual, publication SYSLIB-RM007
One of these symbols appears to indicate the described Interlock or Permissive
condition.
Table 8 - Permissive and Interlock Status Indicators
Permissive Symbol

Interlock Symbol

Description
One or more conditions not OK

Non-bypassed conditions OK

All conditions OK, bypass active

All conditions OK

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Alarm indicators appear on the Operator tab when the corresponding

alarm occurs.

Interlock Trip Alarm

Step Time Out Alarm

Sequence Time Out Alarm

Table 9 shows the alarm status symbols used on the Operator tab.
Table 9 - Operator Tab Alarm Status
Graphic Symbol

Alarm Status
In Alarm (Active Alarm)
In Alarm and Acknowledged
Out of Alarm but not Acknowledged
Alarm Suppressed (by Program) Logic
Alarm Disabled (by Maintenance)
Alarm Shelved (by Operator)

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Maintenance Tab
Maintenance personnel use the information and controls on this tab to bypass
interlocks and permissives, force or bypass inputs, force steps, and set values of
outputs that are not used in a given step.
The Maintenance tab is divided into four pages.

Maintenance Tab Page 1

Table 10 shows the functions on page 1 of the Maintenance tab.

Table 10 - Maintenance Tab Page 1 Descriptions
Function

Action

Security

Configuration Parameters

Click to place sequence in Maintenance

mode.

Equipment
Maintenance
(Code C)

None

Click to release sequence from

Maintenance mode.

Click to enable checking of all

permissives and interlocks.

Click to bypass checking of bypassable

permissives and interlocks.

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Disable Alarms
Bypass
Permissives and
Interlocks
(Code H)

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Table 10 - Maintenance Tab Page 1 Descriptions

Function

Action

Security

Configuration Parameters

Wait

Indicates the status of the wait timer:

A dot in the middle of the sysmbol
indicates the timer has qualified.
Click the Wait icon to navigate to the
Force Timer display.

None

None
See Force Timer display on
page 58.

Operator Prompt

Indicates whether a Prompt is

available.
A dot in the middles of the square
indicates that the prompt has been
acknowledged.

Inputs
031

Displays the inputs per the current step

of the sequence.

Operate the
sequence in single
step mode

Cfg_UseInp

Click to force to the next step.

Override/Force
Sequences
(Code L)

Check to run each step and pause, then

run another step and pause, and so
forth.

Equipment
Maintenance
(Code C)

None

Force Timer
The Force Timer display lets you ignore the Wait timer in the current step or use
the timer in the current step.
IMPORTANT

Only one button at a time can be clicked in the Force Timer display. The state of
the current step (forced or unforced) determines which button is active.

Table 11 - Force Timer Display Descriptions

Function

Action

Security

Configuration Parameters

Click to ignore Wait timer in current

step.

Override/Force
Sequences
(Code L)

None

Click to use Wait timer in current step.

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Maintenance Tab Page 2

Maintenance personnel use this tab to verify the inputs are operational and ready
to use.

Clear checkbox indicates the

input is not operational.

Table 12 shows the function on page 2 of the Maintenance tab.

Table 12 - Maintenance Tab Page 2 Description
Function

Action

Security

Configuration Parameters

Use Inputs

All inputs are available for use and

need to be checked. Each input is
qualified as part of the step.
Clear an input if there is a maintenance
issue with the input. The input is
ignored by all steps and is not used for
qualification.
IMPORTANT: Clearing any input will
place the Sequencer in Maintenance
Bypass.

Normal
Production
(Batches &
Lots) (Code J)

Cfg_HasInp
Cfg_UseInp

IMPORTANT

When the Sequencer is in Maintenance Bypass (See Maintenance Bypass

Indicator on page 48), maintenance personnel must confirm that all inputs are
operational.

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Maintenance Tab Page 3

This tab shows the current state of all output bits and lets maintenance personnel
manipulate the bit outputs.

For this display: 'Track Input'

Disabled and Output Can Be
Toggled (as Indicated by the
White Numbers)

For this Display: 'Track Input'

Enabled and Output Cannot
Be Toggled (as Indicated by
the Black Numbers)

Table 13 shows the function on page 3 of the Maintenance tab.

Table 13 - Maintenance Tab Page 3 Description

60

Function

Action

Security

Configuration Parameters

Digital Outputs

Click to toggle the given output.

An output cannnot be toggled if:
Its being actively driven by the
sequence
Track Input is enabled for that input
(black numbers)
A dark gray square is the 'Off' state (0).
A blue square is the 'On' state (1).
IMPORTANT: Maintenance personnel
can manipulate the output directly
from this tab if 'Track Input' on the
Discrete Output Configuration page is
turned off for a particular output AND
(the current Sequencer step is not
using a particular output OR the
sequence is in a Held state). (See
'Discrete Output Configuration' dialog
box on page 22.)

Equipment
Maintenance
(Code C)

None

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Maintenance Tab Page 4

This tab lets maintenance personnel specify analog outputs that are currently not
being used in a step.

Table 14 shows the function on page 4 of the Maintenance tab.

Table 14 - Maintenance Tab Page 4 Description
Function

Action

Security

Configuration Parameters

Analog Outputs

Type a setpoint or value for the analog

outputs configured for the Sequencer.
Outputs that are being actively driven
by the sequence cannot be written.
These outputs are grayed out.
IMPORTANT: An output can be written
only if 'Track Input' on the Analog
Output Configuration page for that
particular output is turn off. (See
'Analog Output Configuration' dialog
box on page 23.)

Equipment
Maintenance
(Code C)

None

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Engineering Tab
The Engineering tab lets you configure parameters for the Sequencer and
sequence. You also can type a description, label, and tag for your Sequencer.

Table 15 lists the functions on the Engineering tab.

Table 15 - Engineering Tab Description
Function

62

Action

Security

Configuration Parameters

Click the Display Sequence

Configuration Window button to
access the Discrete Inputs, Discrete
Outputs, and Analog Outputs
configuration dialog boxes.

None

None

Click the Mode Configuration Display

button to change the default mode.

Engineering
Configuration
(Code E)

See page 64 for details.

Description

Type the description to show on the

Faceplate title bar.

Cfg_Desc

Label

Type the label to show on the

graphic symbol.

Cfg_Label

Tag

Type the tag name to show on the

Faceplate title bar and in the Tooltip.
IMPORTANT: Pausing the mouse
over this field displays a tool tip with
the configured Logix tag/path.

Cfg_Tag

Clear Program
Commands upon
receipt

Check to clear program commands on

receipt.

Cfg_PCmdClear

The sequencer has

an Operator Prompt
Queue

Check to enable the manual prompt

queue.

Cfg_HasManPrompt

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Table 15 - Engineering Tab Description

Function

Action

Enable navigation
Check if a Permissive object is used
to permissive object with this motor. This changes the
Permissive indicator to a clickable
button to open the Permissive
faceplate.
IMPORTANT: The name of the
Permissive object in the controller
must be this object's name with the
suffix _Perm. For example, if your
P_Seq object has the name Seq123,
then its Permissive object must be
named Seq123_Perm.

Security

Configuration Parameters

Engineering
Configuration
(Code E)

Cfg_HasPermObj

Enable navigation
to interlock object

Check if an Interlock object is used

with this motor. This changes the
Interlock indicator to a clickable
button to open the Interlock
faceplate.
IMPORTANT: The name of the
Interlock object in the controller must
be this object's name with the suffix
_Intlk. For example, if your P_Seq
object has the name Seq123, then its
Interlock object must be named
Seq123_Intlk.

Cfg_HasIntlkObj

Put sequence in
Held State if the
step fault timer
expires

Check to put the sequence in a Held

State if the step timer expires.

Cfg_StepFTmrDNAction

Sequence Timeout
(milliseconds)

Type a time in milliseconds that the

sequence must be complete or a
timeout occurs.

Cfg_SeqTO

Sequence Quantity
Units

Type the engineering units for

the quantity.

Cfg_QtyEU

When the Interlock

Trips, the
Sequencer...
Stops
Goes to the last
interlock step
Holds at the
current step

Check the box to indicate the

Sequencer action when an
interlock trips.

Cfg_IntlkTripAction

Sequence Quantity
Maxiumum
Quantity for a
Sequence
Default Quantity for
the Sequence
Minimum Quantity
for a Sequence

Cfg_QtyMax
Cfg_StdQty
Cfg_QtyMin

Type a maximum value for a quantity.

For scaling details, see page 64.
Type a default quantity for a
sequence.
Type a minimum value for a quantity.
Click the Display Step Configuration
Window button to configure
individual steps of a sequence.

None

Click the Multiple Step Sequence

Configuration button to configure
multiple steps of a sequence at
one time.

Rockwell Automation Publication PROCES-RM006B-EN-P - August 2014

See page 25 for details.

See page 32 for details.

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Mode Configuration Display

This display lets you select the default mode for the object by selecting the
appropriate mode.
IMPORTANT

If no mode is being requested, changing the default mode changes the mode
of the instruction.

You must have FactoryTalk View security code E to select the default mode on
this display.

Configuring a Range for Scaling Parameters

Cfg_QtyMax
Cfg_StdQty
OSet_Qty (Oper, Maint),
PSet_Qty (Prog)

Cfg_QtyMin
0

These configuration parameters define how you scale REAL output parameters:
Cfg_QtyMax - Maximum quantity clamping value. This is the
maximum value that can be entered by the user as a quantity in
PSet_Qty or OSet_Qty.
Cfg_StdQty - Standard quantity. This is the quantity value that
corresponds to scaling to 100%, thus setting the scaled outputs as if they
were unscaled. When the sequence is reset to the Idle state, the Program
and Operator quantity settings (PSet_Qty and OSet_Qty) are initialized
to this value.
Cfg_QtyMin - Minimum quantity clamping value. This is the minimum
value that can be entered by the user as a quantity.
For each REAL output that is configured as scaled, the output value is calculated.

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In Program Mode:
ScaledREALOutput = UnscaledREALOutput x PSet_Qty / Cfg_StdQty
In Operator or Maintenance Mode:
ScaledREALOutput = UnscaledREALOutput x OSet_Qty / Cfg_StdQty
In order for the scaling configuration to be valid the following must be true:
0 <= Cfg_MinQty <= Cfg_MaxQty
Negative quantities are not permitted, and the minimum quantity must not be
greater than the maximum quantity. The standard quantity (Cfg_StdQty), the
Program quantity setting (PSet_Qty) and the Operator quantity setting
(OSet_Qty) are all clamped to be within this range.
0 < Cfg_StdQty
The standard quantity must be positive. If Cfg_StdQty is zero, a divide-by-zero
error occurs and the scaled output is set to infinity.

Diagnostics Tab
The Diagnostic tab provides indications that are helpful in diagnosing or
preventing device problems, which could include specific reasons a device is 'Not
Ready', device warnings and faults, warning and fault history, and
predictive/preventive maintenance data.
Device Not
Ready Indicator

The above image indicates that the device is not ready because the Device
Interlocks are not OK.

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Alarms Tab
The Alarms tab displays each configured alarm for the P_Seq instruction. The
button on the tab for the alarms page changes color based on the current active
alarms. A blinking alarm button indicates that one or more alarms must be
acknowledged or the device must be reset.

Alarm Names
Alarm Acknowledge
Command Button
Reset and Acknowledge
All Alarms Command
Button

Alarm Severity
Indicators

Clicking on an alarm name opens the P_Alarm faceplate for that alarm. From the
P_Alarm faceplate, you can configure and perform additional operations on
the alarm. The color of the bell at the top of the faceplate shows the highest active
alarms severity.
Table 16 - Alarm Severity Color Definitions

66

Color

Definition

Magenta

Urgent

Red

High

Yellow

Medium

Blue

Low

White (bell icon)

Alarm has cleared but is unacknowledged

Background (light gray)

No alarm

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Table 17 shows the function on the Alarms tab.

Table 17 - Alarms Tab Description
Function

Action

Security

Alarm Name

Click the alarm name to open the associated P_Alarm faceplate.

None

Click to acknowledge the alarm.

Acknowledge Alarms
(Code F)

Click to reset and acknowledge all alarms.

The Reset and Acknowledge All Alarms button is enabled and the panel behind
the alarm blinks and the Alarm Acknowledge button is enabled if the alarm
requires acknowledgment. Click the q with the checkmark to acknowledge the
alarm.
Refer to the Rockwell Automation Library of Process Objects: Common Alarm
Mode (P_Alarm) Reference Manual, publication SYSLIB-RM002, for more
information.

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Sequencer Faceplate Help

The Faceplate Help is divided into three pages.

Faceplate Help Page 1

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Faceplate Help Page 2

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Faceplate Help Page 3

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Rockwell Automation Support

Rockwell Automation provides technical information on the Web to assist you in using its products.
At http://www.rockwellautomation.com/support you can find technical and application notes, sample code, and links to
software service packs. You can also visit our Support Center at https://rockwellautomation.custhelp.com/ for software
updates, support chats and forums, technical information, FAQs, and to sign up for product notification updates.
In addition, we offer multiple support programs for installation, configuration, and troubleshooting. For more
information, contact your local distributor or Rockwell Automation representative, or visit
http://www.rockwellautomation.com/services/online-phone.

Installation Assistance
If you experience a problem within the first 24 hours of installation, review the information that is contained in this
manual. You can contact Customer Support for initial help in getting your product up and running.
United States or Canada

1.440.646.3434

Outside United States or Canada

Use the Worldwide Locator at http://www.rockwellautomation.com/rockwellautomation/support/overview.page, or contact your local

Rockwell Automation representative.

New Product Satisfaction Return

Rockwell Automation tests all of its products to help ensure that they are fully operational when shipped from the
manufacturing facility. However, if your product is not functioning and needs to be returned, follow these procedures.
United States

Contact your distributor. You must provide a Customer Support case number (call the phone number above to obtain one) to your
distributor to complete the return process.

Outside United States

Please contact your local Rockwell Automation representative for the return procedure.

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