M340 Modbus TCP Communication

[ii7onyx]

Hi, I hope everyone's week is going great.

I have ADAM-6217 Analogue module which supports Modbus TCP and I am trying to get the AI values of the temperature sensor connected to Channel 0 of the Adam module.

I am new to the M340 programming and trying to get my head around the memory addressing scheme and communications with external devices.

I have already tried the following two methods but it doesn't seem to work.

http://www.plctalk.net/qanda/showthread.php?t=127057&highlight=m340+modbus and

https://www.youtube.com/watch?v=QhkIQCOyxjo


Please have a look at the attached screenshots.
I have tried the ADDM block with different addressing schemes, e.g., 'Ethernet_1{84.26.17.150}TCP.MBS', '0.0.3{84.26.17.150}TCP.MBS', '0.0.3{84.26.17.150}' and 'Ethernet_1{84.26.17.150}'

Can someone please tell me what should be the values of the READ_VAR parameters in order for me to read 40001 address from the adam 6217?


The details are below:
M340 PLC -- > IP: 84:26.17.167

Adam 6217:
IP: 84.26.17.150,
Address to be read: 40001

 

[modiconguy]

You need to use IEC registers when using %MW. The address 40001 in Modbus registers is equal to %MW0. So put a 0 in the NUM input.

 

[ii7onyx]

You need to use IEC registers when using %MW. The address 40001 in Modbus registers is equal to %MW0. So put a 0 in the NUM input.

Thanks for your reply. I managed to make it work by changing the NUM to 0 as suggested. Really appreciate!!!

I have attached a screenshot of the working code example.