Bulletin L-21

Series MPCJR Pump Controller

Specifications - Installation and Operating Instructions
4-1/2 [114.3]
17/32 [13.5] 3-25/32 [95.9]

3-19/32
[91.3] 3-25/32
[95.9]

MAX. PANEL THICKNESS 0.25 [6.35]

TABLE OF CONTENTS SPECIFICATIONS

Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Inputs: 0 (or 4)-20 mA DC or 0 (or 2.0)-10.0 VDC
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 selectable.
Getting Started. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Input Impedance: Current input: 10 Ω, Voltage input:
Model Identification. . . . . . . . . . . . . . . . . . . . . . . . . . 2 5K Ω.
Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Output Ratings: Control relays: SPDT, rated 10A @
Wiring. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5 240 VAC res., 1/4 hp @120 VAC, 1/3 hp @ 240 VAC;
Front Panel Functions. . . . . . . . . . . . . . . . . . . . . . 6-7 Alarm relays: SPST, 3A @ 240 VAC res., 1/10 hp @
Home Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 120 VAC; Other: 15 VDC @ 20 mA for output one and
Security Level Selection. . . . . . . . . . . . . . . . . . . . . . 7 output two.
Lead/Lag Operation. . . . . . . . . . . . . . . . . . . . . . . . . . 7 Control Type: On/off, reverse or direct acting.
Analog Retransmission Operation . . . . . . . . . . . . . 7 Power Requirements: 100-240 VAC nominal, +10%-
Serial Communication Operation. . . . . . . . . . . . . . . 8 15%, 50 to 400 Hz, single phase; 132 to 240 VDC
Menu Selections . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 nominal, +10%-15%.
Secondary Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Power Consumption: 7.5 VA max.
Secure Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-12 Accuracy: ±0.25% of span, ±1 least significant digit.
Alarm Type and Action . . . . . . . . . . . . . . . . . . . . 10-11 Display: Two 4-digit, 7 segment 0.56˝ high LED’s.
Diagnostic Error Messages . . . . . . . . . . . . . . . . . . 12 Display Resolution: 1 count.
Programming Chart. . . . . . . . . . . . . . . . . . . . . . . . . 13 Memory Backup: Nonvolatile memory (no batteries
Programming Example. . . . . . . . . . . . . . . . . . . . . . 14 required).
Serial Communications: Optional RS-232 or RS-485
with Modbus® protocol.
Ambient Operating Temperature / RH: 14 to
131°F (-10 to 55°C) / 0 to 90% up to 104°F (40°C)
non-condensing, 10 to 50% at 131°F (55°C) non-
condensing.
Weight: 16 oz (454 g).
Front Panel Rating: Meets UL type 4X (IP66).
Loop Power Supply (Isolated): 24 VDC @ 50 mA,
regulated.
Alarm On-Off Differential: 1 count.
Set Point Range: Selectable.
Power Voltage Stability: 0.05% over the power
voltage range.
Temperature Stability: 100 PPM/°C typical, 200
PPM/°C max.
Common Mode Rejection: 140 db minimum at 60
Hz.
Normal Mode Rejection: 65 db typical, 60 db at 60
Hz.
Isolation: Relay: 1500 VAC to all other inputs and
outputs; 24 VDC loop power: 500 VAC to other inputs
and outputs; Process output: 500 VAC to other inputs
and outputs.
Storage Temperature: -40 to 176°F (-40 to 80°C).
Agency Approvals: UL 508.

DWYER INSTRUMENTS, INC. 1

GETTING STARTED
1. Install the control as described on page 2.

2. Wire the control following the instructions on pages

3 through 5. Page 3 contains basic wiring for the Panel cut-out:
control. If using the Series MPCJR’s transmitter power 3.620 x 3.620 in,
supply follow the additional directions on page +0.032/-0.000
4. Wiring instructions for the 232 and 485 series (92 x 92 mm,
communication options is included on page 5. +0.8/-0.0)

3. Familiarize yourself with the front key pad functions

and read the menu structure prior to starting the
programming process. A programming chart with the
menu structure and spaces to write your programming
values is included on page 13. This chart can be a Figure 1: Panel cut out dimensions
helpful tool to save time in programming. For further
assistance programming examples are included on
page 14. CAUTION It is not necessary to remove the
instrument chassis from the housing
for installation. If the instrument
MODEL IDENTIFICATION chassis is removed from the housing, you must follow
industry standard practice for control and protection
against Electro-Static Discharge (ESD). Failure to
Model MPCJR - exercise good ESD practices may cause damage to the
instrument.
Options
OPTIONS
232 RS-232 Modus®-RTU Serial Communications.
Allows remote computer to read and write all
control parameters.
485 RS-485 Modbus®-RTU Serial Communications.
Allows remote computer to read and write all
control parameters.
RV Analog retransmission of input, 0-10 VDC.
RC Analog retransmission of input, 0 (or 4)-20 mA.

Input Ranges
Process Input Types
The 0-20 mA DC, 4-20 mA DC, 0-10 VDC, and 2-10
VDC inputs are fully scalable from a minimum of 100
count span placed anywhere within the range of -1999
to +9999. Decimal point position is adjustable from the
zero place (9999), tenths (999.9), hundredths (99.99), or
thousandths (9.999).

INSTALLATION
Mount the instrument in a location that will not be subject
to excessive temperature, shock, or vibration (see
Specifications for specific tolerances). All models are
designed for mounting in an enclosed panel.

Select the position desired for the instrument on the

panel. Prepare the panel by cutting and deburring the
required opening.

From the front of the panel, slide the housing through

the cut out. The housing gasket should be against the
housing flange before installing.

From the rear of the panel slide the mounting collar over
the housing. Hold the housing with one hand and using
the other hand, push the collar evenly against the panel
until the springs are compressed. The ratchets will hold
the mounting collar and housing in place.

2
WIRING
Do not run transmitter wiring or other Class 2 wiring in
the same conduit as power leads. Use only the probe or
transmitter for which the control has been programmed.
Maintain separation between wiring of sensor, auxiliary
in or out, and other wiring. See the “Secure Menu” for
input selection.

Supply connections should be made in accordance with

the National Electrical Code per Article 300, and local
regulations. All line voltage output circuits must have a
common disconnect and be connected to the same pole
of the disconnect.
Input wiring for probe or transmitter is rated CLASS 2.
Control wiring is as shown in Figure 2 below.
-
OPTION RV, RC
+

1 21 22 23 24 25 26 11 24 VDC
@ 50 MA
VOLTAGE 2 RELAY 12 ISOLATED
AND SSR
3 CURRENT N.C. 13
PUMP 1
CURRENT 4 COM. 14 OUTPUT
5 N.O. 15

ALARM 1 6 N.O. N.C. 16

CONTACTS PUMP 2
7 COM. COM. 17 OUTPUT
ALARMS 2 8 N.O. N.O. 18
CONTACTS 9 COM. 19

10 27 28 29 30 31 32 20

LINE INPUT
COM. PUMP1 PUMP2 100 TO 240 VAC
50 - 400 HZ. SINGLE PH
NOTE: 15 VDC 132 TO 240 VDC 5VA
1. FOR SUPPLY CONNECTIONS
USE NO. 16 AWG OR LARGER MAX. OUTPUT RATINGS:
WIRES RATED FOR AT LEAST 75C, RELAY: 10A. @ 240 VAC RES.
OR IN ACCORDANCE WITH AN 1/4 HP @ 120 VAC
EQUIVALENT NATIONAL STANDARD. 1/3 HP @ 240 VAC
2. MAXIMUM AMBIENT TEMPERATURE ALARM: 3A. @ 240 VAC RES.
RATING 131F [55C] P.D. 240VA, 120/240 VAC
3. USE COPPER CONDUCTORS ONLY SW. VOLT.: 15 VDC @ 20 MA
4. TERMINALS 1-5, 10-12, AND 21-32
ARE CLASS 2 'SELV'.
290-3126
Figure 2: Wiring

3
WIRING FOR TRANSMITTER INPUTS USING
INTEGRAL POWER SUPPLY

Wire power and outputs as shown on previous page.

Wiring for two-wire transmitters shown below in Figure 3.
All wiring shown in Figure 3 is Class 2.
USE OF A FUSE
[1/8A FAST-BLOW] IN THE LOOP CONNECT JUMPER BETWEEN TERMINALS 3 AND 12
IS RECOMMENDED TO PROTECT
THE CONTROL INPUT CIRCUITRY. CONNECT TRANSMITTER PLUS [+] TO TERMINAL 11

1 21 22 23 24 25 26 11
2 12
3 13
CONNECT TRANSMITTER
MINUS [-] TO TERMINAL 5 4 14
5 15
6 16
7 17
8 18
LEVEL
TRANSMITTER 9 19
10 27 28 29 30 31 32 20

Figure 3: Transmitter wiring

For three or four wire transmitters follow the wiring

instructions provided with your transmitter.

WARNING DO NOT wire the 24 V Power Supply

across the input of the control.
Damage to the control input circuitry
will result.

USE OF SNUBBERS WITH INDUCTIVE LOADS

SNUBBER 9/16 THICK

1-1/4
COIL OF RELAY
OR MOTOR STARTER SWITCHED AC
[FROM CONTROLLER] 3/8
7/8 4
SNUBBER PHYSICAL
CHARACTERISTICS [TYPICAL]

A snubber is a resistance/capacitance device that is used

to reduce or eliminate high voltage spikes generated
from inductive loads. For best effect, the snubber should
be mounted as close to the coil as physically possible.
Electrical and typical physical characteristics are shown
above.

CAUTION Failure to use a snubber on an

inductive load may cause erratic
operation and/or premature relay
contact wear.

4
WIRING FOR 485 AND 232 SERIAL COMMUNICATION
OPTIONS

Wire power and outputs as shown on page 3. Wiring

for options is shown in Figure 4 below. All wiring shown
below is Class 2. Shielded twisted pair is recommended
for Option 485.

WARNING DO NOT run signal wiring in the

same conduit or chase as the power
wiring. Erratic operation or damage
to the control circuitry will result.

DB-25 WIRING [VIEWED FROM WIRE SIDE]

1 11 DATA IN 30
21 22 23 24 25 26
2 DATA OUT 32
12 DATA GROUND 31
1 2 3 4 5 6 7 8 9 10 11 12 13

3 13 14 15 16 17 18 19 20 21 22 23 24 25

4 14 PIN DESCRIPTION PIN DESCRIPTION

1 SHIELD 6 DSR
5 15 2 TRANSMIT 7 GROUND
3 RECEIVE 8 DCD
6 16 4 RTS 20 DTR
OPTION 485 DIP SWITCH POSITIONS* 5 CTS
7 17 RS-232 DB-9 WIRING [VIEWED FROM WIRE SIDE]
HALF DUPLEX* FULL DUPLEX DATA OUT 32
8 ON 18 DATA IN 30
DATA GROUND 31
9 OFF
19
1 2 3 4 5

123456 123456 6 7 8 9
PIN DESCRIPTION
10 27 28 29 30 31 32 20 1 DCD
2 RECEIVE
3 TRANSMIT
4 DTR
5 GROUND
6 DSR
7 RTS
8 CTS

Terminal 29 30 31 32
Option 485 Y (receive -) Z (receive +) A (transmit -)* B (transmit +)*
Option 232 Not used Data out Data ground Data in
*For half-duplex operation wire only A and B. Do not connect to Y and Z.
Figure 4: Wiring for options

5
FRONT PANEL FUNCTIONS
ALARM LAMPS

PUMP 1
ON LAMP

PUMP 2
ON LAMP

LEVEL
DISPLAY

1ST SET
POINT
DISPLAY

Key functions are as follows:

INDEX: Pressing the INDEX key advances
the display to the next menu item. May also be used
in conjunction with other keys as noted below.

UP ARROW: Increments a value, changes a

menu item, or selects the item to ON. The maximum
value obtainable is 9999 regardless of decimal
point placement.

UP ARROW AND ENTER: Pressing these keys

simultaneously brings up the secondary menu
starting at the SP1H menu item. Pressing these keys
for 5 seconds will bring up the secure menu.

DOWN ARROW: Decrements a value, changes a

menu item, or selects the item to OFF. The
minimum value obtainable is -1999 regardless of
decimal point placement.

ENTER: The ENTER key is used to store

the value of menu items once they are changed to
a new value. If the ENTER key is not pressed
after changing the value the item will revert to the
previously stored value.

6
 LEAD/LAG OPERATION
INDEX and DOWN ARROW: Pressing these The Mercoid® MPCJR pump controller is designed
keys simultaneously will allow backing up one menu to easily operate a pair of pumps in the most efficient
item, or if at the first menu item they will cause the display manner possible. The controller has a ‘lead/lag’ feature
to return to the primary menu. If an alarm condition has that allows two pumps to operate in an alternating
occurred, these keys may be used to reset the alarm. fashion to minimize wear.
INDEX and ENTER: Pressing these keys The Mercoid® MPCJR pump controller has a pair of
simultaneously and holding them for 5 seconds allows set points each for pump 1 and pump 2. If the lead/lag
recovery from the various error messages. The following feature is turned off, SP1H and SP1L control pump 1 and SP2H
menu items will be reset: and SP2L control pump 2. If the lead/lag feature is turned
on, pumps 1 and 2 will be controlled in the alternating
ALiH: Alarm inhibit fashion described below. In all cases the P1 lamp will
CHEC CAL: Check calibration error indicate activity of pump 1 and the P2 lamp will indicate
activity of pump 2. The lead/lag operation is set in the
Correct the problems associated with the above Secure menu with the item LdLg.
conditions before using these reset keys. More than one
error could be present. Caution is advised since several Lead/Lag On
items are reset at one time. After installation, set the SP1H to the high level (pump on
point) for standard operation. Set SP1Lto the low level
The Home Display (pump off point). Set the SP2H to the level where you want
The home display is the normal display while the control BOTH pumps to turn on (emergency pump on). Set the
is operating. If no errors or functions are active, the SP2L to the level where you want the second pump to turn
HOME display will indicate the Process Variable (the off (emergency pump off).
level that is being measured) on the top display and the
SP1H value, Pump 1 On Set Point, on the bottom display. The controller will not allow you to set SP1H below SP1L,
SP1L above SP1H, SP2H below SP2L, or SP2L above SP2H. The
Error messages may over-ride the HOME display. See controller will not allow you to set any set point or alarm
ERROR MESSAGES on page 12. point above or below the programmed scale. No error
messages are generated. The displayed value will stop
While in the Secondary Menu, if no key is pressed for at an allowable point just above (or below, as the case
a period of 30 seconds, the display will return to the may be) the maximum or minimum allowed.
HOME position displaying the process value. While in
the Secure Menu, if no key is pressed for a period of In normal operation, when the SP1H point is reached, one
60 seconds, the display will return to the HOME position of the pumps will turn on. When lead/lag is turned on,
displaying the process value. Outputs are disabled pumps 1 and 2 will alternate. If the level reaches the SP2H
(turned off) when the Secure Menu is active. point, both pumps will be turned on until the SP2L point is
reached, where one of the pumps will turn off. When SP1L
Security Level Selection is reached, remaining running pump will turn off. The last
Three levels of security are provided. The SECr menu pump off will not be the next pump on.
item security level may be viewed or changed at any time
regardless of the present security level in the Secure Lead/Lag Off
menu. The display shows the current security level. To If lead/lag is turned off, SP1H and SP1L control pump 1 and
change security levels change the password value using SP2H and SP2L control pump 2. There is no alternating
the UP ARROW or DOWN ARROW keys and function.
pressing the ENTER key. Refer to the password
table (following) for the correct value to enter for the OPERATION RV, RC ISOLATED ANALOG
security level desired. RETRANSMISSION
The analog retransmission option allows the Process
To set the access level to, for example, 2, at the SECr Variable or the Set Variable to be sent as an analog
menu item press the UP ARROW key until the upper signal to an external device. The signal may be either
display shows the password, 1101. Press the ENTER 0-10 VDC (option RV) or 0 (or 4)-20 mA DC (option RC).
key. The display will blink, and return with the level value, The output may be changed in the field from one to the
2, in the upper display. other by the toggle switch located on the top printed
circuit board.
The password values shown in the table cannot
be altered. Retain a copy of these pages for future Wire the output as shown on page 3.
reference. This is the only reference made to password
values in this instruction book. To set up the analog retransmission, first determine the
scale range that the analog signal will represent. The
maximum scale is 9999 counts. In the Secondary Menu
PASSWORD TABLE set POL for the the scale value that will be represented by
Security Displayed Password the low end of the analog signal (0 V or 0 mA). Set POH for
Level Value Value To the scale value that will be represented by the high end
Menu Status When Viewed Enter of the analog signal (10 V or 20 mA).
Secondary Locked 2 1101 If you require a suppressed scale or output, you may use
Secure Locked the following equations to determine the proper settings
Secondary Unlocked 3 1011 for POL and POH.
Secure Locked
Secondary Unlocked 4 111 K= (Highest desired scale reading - Lowest desired
Secure Unlocked scale reading)/(Maximum desired analog signal -
Minimum desired analog signal).
POH= ((Maximum possible analog output - Maximum
desired analog signal) *K) + Highest desired
analog reading.
POL = Lowest desired scale reading - ((Minimum desired
analog output) *K).

Operation is automatic. There are no further programming

7 steps required.
OPTION 232, 485 SERIAL COMMUNICATION Secondary Menu
OPERATION Press the UP ARROW and Enter keys to start
The serial communications options allow the control to the menu. Press INDEX to advance to the next menu
be written to and read from a remote computer or other item. Press UP ARROW or DOWN ARROW to
similar digital device. Communication is allowed either change the value in the display. Press ENTER to
through a RS-485 (Option 485) port, or a RS-232 (Option retain the value.
232) port.
SP1H Pump 1 On Set Point. Factory Default 23.1 (feet).
Wire the communication lines as shown on Page 7.
Wiring for the RS-485 is run from control to control in SP1L Pump 1 Off Set Point. Factory Default -5.7 (feet).
a daisy chain fashion with a termination resistor (120
Ω) across the transmit and receive terminals of the last SP2H Pump 2 On Set Point. Factory Default 23.1 (feet).
control in the chain. Set the RS-485 DIP switch for half
or full duplex as appropriate for your application. The DIP SP2L Pump 2 Off Set Point. Factory Default -5.7 (feet).
switch is located on the communications board plugged
into the center of the bottom board of the control. A1Hi Alarm 1 High: Factory Default 23.1 (feet).

Select the control address and communication baud A2Lo Alarm 2 Low: Factory Default 2.0 (feet).
rate with the Addr and bAUd menu items in the Secure
Menu. THE BAUD RATE AND ADDRESS MENU ITEMS
WILL TAKE EFFECT ON THE NEXT POWER UP OF
THE CONTROL. BE SURE TO POWER CYCLE THE
CONTROL BEFORE USING THE NEW BAUD RATE
AND ADDRESS.

In operation, you have the option of preventing a write

command from the host computer. To prevent the host
from writing to the control change the LOrE menu item
in the Secondary Menu to LOC. To allow the host to write
commands to the control set LOrE to rE. (The host does
have the ability to change the LOrE state, but it is not
automatic.)

If your system depends on constant reading or writing

to and from the host, you may wish to set the No Activity
Timer (nAt) to monitor the addressing of the control.
When the LOrE is set to rE and the nAt is set to any value
other than OFF, the control will expect to be addressed
on a regular basis. If the control is not addressed in the
time set by the value of nAt, then the control will display
the error message CHEC LOrE. To clear the message set
LOrE to LOC.

MENU SELECTIONS
Notation Conventions for the Menus
Because of the number of features available in this
control, information is included that may not apply to your
specific control. All usable features are included in this
book, but may not be used in your process. To increase
clarity the following conventions are used:
1. Certain features or functions shown in this book are
contextual. This means that Menu Items may or may
not appear, depending on other Menu Item
selections. Whenever this occurs, a notation is made
in the Menu Item that “controls” or “directs” other
menu items. If you are looking for a particular menu
item and can’t find it, check the menu item that is its
“control” for proper setting.

2. The “#” symbol is used in two ways. It is used inside

a group of characters to indicate which set point
function (SP1 or SP2) is being affected. It is also used
before a group of characters of a menu item to
indicate that there may be more than one selection or
value for that menu item.

8
Secure Menu SCAL Scale Low: Select 100 to 9999 counts below SCAH.
Press the UP ARROW and Enter keys for 5 The total span between SCAL and SCAH must be
Seconds to start the menu. Press INDEX to advance within 11998 counts. Maximum setting range is
to the next menu item. Press UP ARROW or -1999 to +9999 counts. Factory Default is -5.7.
DOWN ARROW to change the value in the display.
Press ENTER to retain the value. OUTPUTS ARE SCAH Scale High: Select 100 to 9999 counts above SCAL.
DISABLED (TURNED OFF) WHILE CONTROL IS IN The total span between SCAL and SCAH must be
THE SECURE MENU. within 11998 counts. Maximum setting range is
-1999 to +9999 counts. Factory Default is 23.1.
SECr Security Code: See the Security Level Selection
and the Password Table on page 7, in order to SPL Set Point Low: Select from the lowest input range
enter the correct password. Factory Default is 4. value to SPH value. This will set the minimum SP1L
or SP2L value that can be entered. The value for
InP Input Type: Select one of the following. Refer to the SP1L or SP2L will stop moving when this value is
Input wiring section for the proper wiring. Factory reached. Factory Default is -5.7.
Default is Curr.
Curr DC Current Input 0.0-20.0 or 4.0-20.0 mA. SPH Set Point High: Select from the highest input range
UOLt DC Voltage Input 0.0-10.0 or 2.0-10.0 V. value to SPL value. This will set the maximum SP1H
- - - - Reserved or SP2H value that can be entered. The value for
SP1H or SP2H will stop moving when this value is
InPC Input Correction: Select ±500 counts. This feature reached. Factory Default is 23.1.
allows the input value to be changed to agree
with an external reference or to compensate for S1St Set Point 1 State: Select P in or POut. Factory
sensor error. default is POut.
Note: InPC is reset to zero when the input type is P in Pump In (Direct Action). As the input
changed, or when decimal position is changed. increases the output will increase.
POut Pump Out (Reverse Action). As the input
LdLg Lead / Lag: Select On or OFF. Factory default is On. increases the output will decrease.
(See page 7).
On The Lead/Lag function is enabled. The 5ILP P1 Lamp: Select 0 on or OoFF. Factory default is 0 on.
outputs of SP1 and SP2 will alternate. 0 on Lamp ON when Output is ON.
OFF The Lead/Lag function is disabled. OoFF Lamp OFF when Output is ON.
OSUP Zero Suppression: Select On or OFF. Factory default
is OFF. S2St Set Point 2 State: Select P In, POut or OFF. Factory
OFF The input range will start at 0 (zero) Input. default is POut.
On The input range will start at 4.00 mA or 2.00 P in Pump In (Direct Action). As the input
V. increases the output will increase.
POut Pump Out (Reverse Action). As the input
dPT Decimal Point Positioning: Select 0, 0.0, 0.00, or increases the output will decrease.
0.000. All Menu items related to the input will be
affected. Factory default is 0.0. 52LP P2 Lamp: Select 0 on or OoFF. Factory default is 0 on.
0 on Lamp ON when Output is ON.
PEA The Peak feature stores the highest input the control OoFF Lamp OFF when Output is ON.
has measured since the last reset or Power On. At
Power On PEA is reset to the present input. To
manually reset the value PEA must be in the lower
display. Press the ENTER key to reset. PEA will
be reset and display the present input value

UAL The Valley feature stores the lowest input the

Controller has measured since the last reset or
Power On. At Power On UAL is reset to the present
input. To manually reset the value UAL must be in
the lower display. Press the ENTER key. UAL will
be reset and display the present input value.

9
ALARM TYPE AND ACTION

CAUTION In any critical application where

failure could cause expensive
product loss or endanger personal
safety, a redundant limit controller is required.

When setting an alarm value for an absolute alarm (A1t =

AbS or A2t = AbS), simply set the value at which the alarm
is to occur.

When setting the alarm value for a deviation alarm (A1t

= dE or A2t = dE), set the difference in value from the Set
Point (SP1H) desired.

Since the input for the MPCJR is driven from a transmitter,

the input display can be programmed in different ways.
Regardless of the position of the decimal point, a change
of one in the right most digit is referred to as a count.
For example, if there were no decimal point selected, a
change from 235 to 236 is a change of one count. If the
decimal point were selected at 0.0, a change of 23.5 to
23.6 is a change of one count.

The following diagram (below) shows the action and

reset functions for both absolute and deviation alarms.
A#HI
HIGH ALARMS HIGH ALARMS
A#HI SP
D D
LOW ALARMS LOW ALARMS
A#LO SP
D D
A#LO A#HI
HIGH AND LOW HIGH AND LOW
ALARM ALARM
A#LO A#HI
D D

Absolute alarms Deviation

When setting up an alarm for deviation the deviation is

set in counts. For example if a low alarm is required to
be 5 counts below the SP1H, then set A#Lo to -5. If a high
alarm is required 20 counts above the SP1H, then set A#Hi
to +20. If SP1H is changed, the alarm will continue to hold
the same relationship as originally set.

When Alarm Power Interrupt, A#Pi, is programmed ON

and Alarm Reset, A#rE, is programmed for Hold, the
alarm will automatically reset upon a power failure and
subsequent restoration if no alarm condition is present.

If Alarm Inhibit, A#iH, is selected ON, an alarm condition

is suspended upon power up until the process value
passes through the alarm set point once. Alarm inhibit
can be restored as if a power up took place by pressing
both the INDEX and ENTER keys for 5 seconds.

10
 WARNING IF INHIBIT IS ON AND A POWER If AL2 is set to OFF the remaining A2, alarm 2, menu items
do not appear.
FAILURE OCCURS DURING A
HIGH ALARM, RESTORATION OF POWER WILL NOT A2t Alarm 2 Type: Select AbS or dE. Factory default is
CAUSE THE ALARM TO OCCUR IF THE PROCESS AbS.
AbS Absolute Alarm that may be set anywhere
VALUE DOES NOT FIRST DROP BELOW THE HIGH within the values of SCAL and SCAH and is
ALARM SETTING. DO NOT USE THE ALARM INHIBIT independent of SP1H.
FEATURE IF A HAZARD IS CREATED BY THIS dE Deviation Alarm that may be set as an offset
ACTION. BE SURE TO TEST ALL COMBINATIONS OF from SP1H. As SP1H is changed the Alarm Point
will track with SP1H.
HIGH AND LOW ALARM INHIBIT ACTIONS BEFORE
PLACING CONTROL INTO OPERATION. A2rE Alarm 2 Reset: Select OnOF or Hold. Factory default is
OnOF.
The following menu items apply only to the alarms. OnOF Automatic Reset.
Hold Manual Reset. Reset (acknowledge) by
AL 1 Alarm 1 function: Select OFF, Lo, HI, or HILo, Factory simultaneously pressing the INDEX and
default is Hi. DOWN ARROW keys for 5 seconds.
OFF Alarm 1 is disabled. No Alarm 1 menu items
appear in the Secondary or Secure menus. A2Pi Alarm 2 Power Interrupt: Select On or OFF. Factory
Lo Low Alarm Only. A1Lo appears in the default is OFF.
Secondary Menu. On Alarm Power Interrupt is ON.
HI High Alarm Only. A1Hi appears in the OFF Alarm Power Interrupt is OFF.
Secondary Menu.
HiLo High and Low Alarms. Both A1Lo and A1Hi A2 iH Alarm 2 Inhibit: Select On or OFF. Factory default is
appear in the Secondary Menu, and share OFF.
the same Alarm 1 Relay output. On Alarm Inhibit is On. Alarm action is suspended
until the process value first enters a non-
If AL1 is set to OFF, go to AL2. alarm condition.
OFF Alarm Inhibit is OFF.
ALt Alarm 1 Type: Select AbS or dE. Factory default is
AbS. A2St Alarm 2 Output State: Select CLOS or OPEn.
AbS Absolute Alarm that may be set anywhere Factory default is CLOS.
within the values of SCAL and SCAH and is CLOS Closes Contacts at Alarm Set Point.
independent of SP1H. OPEn Opens Contacts at Alarm Set Point.
dE Deviation Alarm that may be set as an offset
from SP1H. As SP1H is changed the Alarm Point A2LP Alarm 2 Lamp: Select O on or OoFF. Factory default
will track with SP1H. is O on.
O on Alarm Lamp is ON when alarm contact is
A1rE Alarm 1 Reset: Select OnOF or Hold. Factory default is closed.
OnOF. OoFF Alarm Lamp is OFF when alarm contact is
OnOF Automatic Reset. closed.
Hold Manual Reset. Reset (acknowledge) by
simultaneously pressing the INDEX and FiLt Digital Filter: Select OFF or 1 to 99. In some cases
DOWN ARROW keys for 5 seconds. the time constant of the sensor, or noise could
cause the display to jump enough to be unreadable.
A1Pi Alarm 1 Power Interrupt: Select On or OFF. Factory If this value is set too high, controllability will suffer.
default is OFF. Factory default is 3.
On Alarm Power Interrupt is On.
OFF Alarm Power Interrupt is OFF. The remaining menu items appear if the corresponding
option was purchased with the control.
A1iH Alarm 1 Inhibit: Select On or OFF. Factory default is
OFF. POL (Analog Retransmission Output, see page 8)
On Alarm Inhibit is On. Alarm action is suspended Process Output Low: Select -1999 counts to any
until the process value first enters a non- value less than POH. Factory default is -5.7.
alarm condition.
OFF Alarm Inhibit is OFF. POH (Analog Retransmission Output, see page 8)
Process Output High: Select from any value greater
A1St Alarm 1 Output State: Select CLOS or OPEn. Factory than POL to 9999 counts. Factory default is 23. 1 .
default is CLOS.
CLOS Closes Contacts at Alarm Set Point. LOrE (Option 232 and 485, Serial Communications)
OPEn Opens Contacts at Alarm Set Point. Local / Remote Status: Select LOC or rE. Factory
default is rE.
LOC The host computer is advised not to send
A1LP Alarm 1 Lamp: Select O on or OoFF. Factory default remote commands. Any write commands
is O on. sent to the controls will be rejected.
O on Alarm Lamp is ON when alarm contact is rE The host computer is allowed to send write
closed. commands. If the control is not addressed
OoFF Alarm Lamp is OFF when alarm contact is within the time set in the nAt (No Activity
closed. Timer, see Secure Menu) the CHEC LorE
error message will be displayed.
AL2 Alarm 2 function: Select OFF, Lo, Hi, or HiLo.
Factory default is Lo.
OFF Alarm 2 is disabled. No Alarm 2 menu items
appear in the Secondary or Secure menus.
Lo Low Alarm Only. A2Lo appears in the
Secondary Menu.
Hi High Alarm Only. A2Hi appears in the
Secondary Menu.
HiLo High and Low Alarms. Both A2Lo and A2Hi
appear in the Secondary Menu, and share 11
the same Alarm 2 Relay output.
Addr (Option 232 or 485, Serial Communications) Control
Address: Set from 1 to FF. This number (hexadecimal,
base 16) must match the address number used by
the host computer. Factory default is 32.

bAUd (Option 232 or 485, Serial Communications)

Communication Baud Rate: Select 300, 1200,
2400, 4800, 9600, or 19200. This number must
match the baud rate used by the host computer.
Factory default is 9600.

nAt (Option 232 or 485, Serial Communications) No

Activity Timer: Set from OFF or 1 to 99 minutes.
Factory default is OFF.
1 - 99 Maximum time between host computer
accesses. If timer counts to 0, CHEC/ LorE will
be displayed.
OFF No Activity Timer function is disabled.

DIAGNOSTIC ERROR MESSAGES

Display Meaning SP Outputs Action Required
No display Display is blank. Instrument is Set point Check that the power supply is on, or that the
lighted not getting power, or the supply outputs inactive external fuses are good.
voltage is too low. Alarms inactive
FA1L Fail test appears upon power Set point The display alternates between FA1L tESt and
tESt up if the internal diagnostics outputs inactive one of the following messages: FACt dFLt:
detect a failure. This message Alarms inactive Memory may be corrupted. Press the ENTER
may occur during operation if key and the DOWN ARROW key to start the
a failure is detected. Displays factory default procedure. Recheck controller
flash. programming. rEt FACt: Unrecoverable error,
return to factory for service.
CHEC This message appears if the Set point Restore the communications line and switch
LorE Serial Communications has outputs active the LorE to L0C.
timed out. Alarms inactive
UFL or 0FL Underflow or Overflow: Process Set point Input signals may normally go above or below
value has exceeded input range outputs active range ends. If not, check input and correct.
ends. Alarms active
CHEC CAL Check calibration appears as Set point Remove the instrument for service and / or
an alternating message if the outputs active recalibration. To reset use the INDEX and
instrument calibration nears Alarms active ENTER keys.
tolerance edges.

Check calibration appears Set point Remove the instrument for service and / or
as a flashing message if the outputs recalibration. To reset use the INDEX and
instrument calibration exceeds inactive ENTER keys.
specification. Alarms active
ArEA This message appears if the Set point Correct the ambient temperature conditions.
(Alternates ambient temperature of the outputs active Ventilate the area of the cabinet or check for
with PV) control approaches the ends of Alarm active clogged filters. If RJC broken, return to factory
tolerance. for service.

ArEA This message appears if the Set point Correct the ambient temperature conditions.
ambient temperature of the outputs active Ventilate the area of the cabinet or check for
control is out of range or RJC Alarms active clogged filters. If RJC broken, return to factory
sensor is broken. for service.

12
PROGRAMMING CHART
Use the charts on this and the next page to record the values in your application. You may want to photocopy the pages
if you plan to make programming changes.
Menu Item Default Set At Description
Primary PV SP1H Home Position, Process Variable and SP1H’s Value displayed
Secondary SPIH 23.1 Set Point 1 value (default is in feet)
SPIL -5.7 Set Point 1 off value (default is in feet)
SP2H 23.1 Set Point 2 value (default is in feet)
SP2L -5.7 Set Point 2 off value (default is in feet)
A1Hi 23.1 Alarm 1 (high) value (default is in feet)
A2Lo 2.0 Alarm 2 (low) value (default is in feet)
Secure SECr 4 Security Selection
InP Curr Input (selectable current or voltage)
InPC 0.0 Input Correction
LdL9 On Lead/Lag (selectable on or off)
05UP OFF Zero Suppression (selectable on or off)
dPt 0.0 Decimal Point Positioning
PEA XX Peak, highest input value seen since last reset
UAL XX Valley, lowest input value seen
SCAL -5.7 Scale Low value (default is in feet)
SCAH 23.1 Scale High value (default is in feet)
SPL -5.7 Set Point Low value (default is in feet) since last reset
SPH 23.1 Set Point High value (default is in feet)
SISt POut Set Point 1 State (selectable POut (Pumping Out) or PIn (Pumping In))
SiLP Set Point 1 Lamp Condition when contact is closed (selectable on or off)
525t POut Set Point 2 State (selectable POut (Pumping Out), PIn (Pumping In), or off)
52LP Set Point 2 Lamp Condition when contact is closed (selectable on or off)
ALI Hi Alarm 1 Function (selectable off, lo, hi, or hilo)
ALt AbS Alarm Type 1 (selectable abs (absolute) or de (deviation))
A IrE OnOF Alarm 1 Reset (selectable onof (auto) or hold (manual))
A IP i OFF Alarm 1 Power Interrupt (selectable on or off)
A I iH OFF Alarm 1 Inhibit (selectable on or off)
A I ST CLOS Alarm 1 Output State (selectable close or open)
A I LP O on Alarm 1 Lamp condition when contact is closed (selectable on or off)
AL2 LO Alarm 2 function ( selectable off, lo, hi, or hilo)
A2t Abs Alarm 2 Type (selectable abs (absolute) or de (deviation))
A2rE OnOF Alarm 2 Reset (selectable onof (auto) or hold (manual))
A2Pi OFF Alarm 2 Power Interrupt (selectable on or off)
A2iH OFF Alarm 2 Inhibit (selectable on or off)
A2St CLOS Alarm 2 Output State (selectable close or open)
A2LP Oon Alarm 2 Lamp condition when contact is closed (selectable on or off)
F ILt 3 Digital Filter
POL -5.7 Process Output Low (default is in feet)
POH 23.1 Process Output High (default is in feet)
LOrE rE Local/Remote for computer communications
Addr 32 Control Address for computer communications
bAUd 9600 Baud Rate for computer communications
nAt OFF No Activity Timer for computer communications
Stor YES Store Menu for Hi speed writes (selectable yes or no)

13
PROGRAMMING EXAMPLE Example:
• Keep Empty, two pump (duplex)
• Depth 25 feet
MPCJR • Pump 1: Start at 6 feet
Stop at 3 feet
Pump 2: Start at 12 feet
Stop at 9 feet
• Low level alarm: 1 foot, fixed,
HIGH LEVEL ALARM auto reset
• High level alarm: 20 feet, fixed,
auto reset
• Want Lead/Lag function on
• Automatic reset of pump over .
temperature and seal failure
• No communication options
• Want 4-20 mA retransmission
• Using with a 4-20 mA input.

START 2

STOP 2

START 1

STOP 1

PBLT OR LEVEL TRANSMITTER LOW LEVEL ALARM

EXAMPLE PROGRAMMING CHART

Menu Item Default Set At Description
Secondary SP1H 23.1 6.0 Set Point 1 value (default is in feet)
SP1L 0.0 3.0 Set Point 1 off value (default is in feet)
SP2H 23.1 12.0 Set Point 2 value (default is in feet)
SP2L 0.0 9.0 Set Point 2 off value (default is in feet)
A1Hi 23.1 20.0 Alarm 1 (high) value (default is in feet)
A2Lo 2.0 1.0 Alarm 2 (low) value (default is in feet)
Secure SECr 4 4 Security Selection
InP Cur r Cur r Input (selectable current or voltage)
InPC 0.0 0.0 Input Correction
LdL9 On On Lead/Lag (selectable on or off)
05UP OFF On Zero Suppression (selectable on or off)
dPt 0.0 0.0 Decimal Point Positioning
PEA XX Peak, highest input value seen since last reset
URL XX Valley, lowest input value seen
SCAL -5.7 0.0 Scale Low value (default is in feet)
SCAH 23. 1 25.0 Scale High value (default is in feet)
SPL -5.7 Set Point Low value (default is in feet) since last reset
SPH 23. 1 Set Point High value (default is in feet)
SISt POut Set Point 1 State (selectable POut (Pumping Out) or PIn (Pumping In))
SILP Set Point 1 Lamp Condition when contact is closed (selectable on or off)
525t POut POut Set Point 2 State (selectable POut (Pumping Out), PIn (Pumping In), or
off)
52LP Set Point 2 Lamp Condition when contact is closed (selectable on or off)
AL I Hi Hi Alarm 1 Function (selectable off, lo, hi, or hilo)
A Lt AbS AbS Alarm Type 1 (selectable abs (absolute) or de (deviation))
A I rE OnOF OnOF Alarm 1 Reset (selectable onof (auto) or hold (manual))
AIPi OFF OFF Alarm 1 Power Interrupt (selectable on or off)
AI iH OFF OFF Alarm 1 Inhibit (selectable on or off)
AIST CLOS CLOS Alarm 1 Output State (selectable close or open)
AILP O on O on Alarm 1 Lamp condition when contact is closed (selectable on or off)
AL2 LO LO Alarm 2 function ( selectable off, lo, hi, or hilo)
A2t Abs Abs Alarm 2 Type (selectable abs (absolute) or de (deviation))
A2rE OnOF OnOF Alarm 2 Reset (selectable onof (auto) or hold (manual))
A2Pi OFF OFF Alarm 2 Power Interrupt (selectable on or off)
A2iH OFF OFF Alarm 2 Inhibit (selectable on or off)
A2St CLOS CLOS Alarm 2 Output State (selectable close or open)
A2ULP Oon Oon Alarm 2 Lamp condition when contact is closed (selectable on or off)
FILt 3 3 Digital Filter
POL -5.7 0.0 Process Output Low (default is in feet)
POH 23. 1 25.0 Process Output High (default is in feet)

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Modbus® is a registered trademark of Schneider Automation, Inc.

©Copyright 2020 Dwyer Instruments, Inc. Printed in U.S.A. 12/20 FR# 443341-00 Rev. 5

DWYER INSTRUMENTS, INC. 16