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from the Controls Engineering department...
Configuring TM2AMI2HT module as 4-20ma analog current
PLCs and related questions. topic
Posted by kathirvelan on 2 July, 2012 - 7:36 am
How do i configure the "TM2AMI2HT" module as "4-20ma" analog current input mode through modscan software and check its working?


Posted by David on 2 July, 2012 - 10:19 am
Can we assume that this is a rehash of your earlier thread?
http://www.control.com/thread/1340882905

It appears that you are now using Modscan (a generic Modbus master app) rather than writing your own driver (calculating your own CRC?)

Before we get into modbus comm details, why do you believe that you can configure the module via Modbus? Maybe you can, but in many systems, the configuration is the domain of the development software. Is there actually a table or map of configuration parameters with Modbus addresses/registers for the AI module? Or are you expecting to do with Modbus what should be done in the development software?

Now to details:
Are you using RS-232, RS-485 or ethernet to communicate?

Exactly, what communications settings have you applied to
- the Schneider comm module (which model is it?)
- Modscan?

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