Objective:
To control a 0-10VDC or 0/4-20mADC output signal between 0-100% using push buttons on the unit’s display.
Materials Needed:
- PM500D0400800F00 or PM500D0301600F00
- PMM000I0AN000000
Wiring Configuration:
OP1 (terminal 4) to INP CNT1 (terminal 15)
OP2 (terminal 5) to INP CNT2 (terminal 16)
OP COM (terminal 6) to INP COMM (terminal 14)
The analog output signal will be picked up off the analog output module, either terminals 1(+) and 2(-) for a 0-10VDC signal, or terminals 3(+) and 4(-) for a 0/4-20mADC signal.
Programming the meter:
Click on the gear icon at the top right of the screen to enter the programming menu.
Counter:
To access the counter configuration, click on the device menu tab, which looks like a computer monitor at the top of the screen, second icon from the right. From there, click “Signal Input Configuration”.
Begin in “Counter Input Configuration” and select “Input A” to start.
Using the red arrows on the side of the screen, you can jump through this submenu.
The options that should be set are:
Digital Filter=Off
Input Logic Selection for Counter=Low Acting
Logic Selection for Input=Sink
Press “Apply” when the settings are confirmed.
Now click on “Counter Configuration” which should be the second option in the list, then select “Counter A” to begin.
Using the red arrows on the sides to cycle through the options again, the parameters should be set as:
Operating Mode Counter=Dual Count x1 Add/Subtract
Decimal Point=0
List Selection=List A
Scale Factor for List A=1.00000
Count Load for List A=500 (this value will not have a direct effect on system)
Scale Multiplier=1
Reset Action=Zero
Reset at Power-up=User’s choice
Press “Apply” when the settings are confirmed.
Outputs:
Click the device menu tab again (looks like a computer monitor), followed by “SP & Analog Configuration”.
Begin with the “Setpoint SSR Logic” choice and make sure “SSR Logic for Setpoint 1 and 2” is set to “Sink” and press Apply when done.
Now choose “Setpoint Configuration” and make sure “Setpoint 1” is highlighted. Using the red arrow to navigate through this menu, the parameters should be set as follows:
Setpoint Assignment=Rate A
Setpoint Action=Timed Out
Output Logic=Normal
Annunciator Type=Off
Annunciator Color=Red (Not applicable because of previous parameter)
Setpoint Active Color=Red
Configure List A/B=List A Config
Setpoint Value for List A=100
Setpoint Tracking=No
Activation Boundary Type=High Acting
Hysteresis=2
On Time Delay=0.00
Output Timed Out=0.01
Rate Timed Output One-Shot=No
Press “Apply” once the settings are confirmed, followed by “Setpoint Configuration” again. This time, you will select “Setpoint 2” and set all values identical to how you programmed Setpoint 1, using the same settings listed above.
When you confirm all parameters are set according to the list above, press “Apply” again to move toward setting up the analog output.
Press “Analog Configuration” to begin, then you will be prompted with the different analog output options for “Analog Output Type”. This selection is completely user dependent.
When you have the output type you want selected, press the red arrow to the right and set the rest of the parameters as follows:
Analog Output Assignment=Counter A
Analog Low Scale=0
Analog High Scale=100
Press “Apply” when settings are confirmed.
Buttons:
Press the Device menu tab at the top again, followed by the red arrow to the right. This should show “Function Configuration” at the top, select this option.
Press “Function Key Configuration” then turn “Enable Function Key” to ON.
Begin by selecting F1 and pressing the red arrow to the right. You can rename the key here; I like to use “Up”.
“Select Function” should be set to “Momentary Output Active” and “Setpoint 1” should be highlighted. Press Apply when done.
Choose “Function Key Configuration” again, leaving “Enable Function Key” on, but now selecting F2.
You can rename this key if you’d like, I use “Down”. Make sure “Select Function” is set to “Momentary Output Active” and “Setpoint 2” is highlighted. Apply these settings when done.
Use:
You are now finished programming the PM50 to act as a digital potentiometer. If you return to the main screen, you should see Counter A at 0 and two buttons at the bottom of your screen. Pressing the first button on the left will increase the A count value by 1, pressing the second button will subtract 1 from the A count.
Your analog output is scaled between 0-100%, meaning you will get the lowest possible output when your counter is at or below 0, and will max out when at or above 100 on the count.
Disclaimer
It is the customer's responsibility to review the advice provided herein and its applicability to the system. Red Lion makes no representation about specific knowledge of the customer's system or the specific performance of the system. Red Lion is not responsible for any damage to equipment or connected systems. The use of this document is at your own risk. Red Lion standard product warranty applies.
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