Hello,

I have a problem about communication of CPU 315-2DP (6ES7 315-2AH14-0AB0) with CP 343-1 via Modbus TCP/IP. Im using CPU as server and Im trying to see datas by using ModScan32. ModScan32 dont give "TCP/IP connection terminated" like before it gives modbus message time-out and all the datas are zero like 40001 is 0. Can anyone help me about this problem please ? I attached the variable table situation. Also license is OK like you see. Thank you.

Hi electronics26,

Refer below manual and check if all steps have been followed. Mainly the connection in NetPro and the server client bit in DB.

https://support.industry.siemens.com/cs/ww/en/view/103447617

Also you could try downloading only the sample program and enure everything else is working fine.

https://support.industry.siemens.com/cs/ww/en/view/109749851

Hope this helps!

Hi electrinics26

The link i posted earlier has a sample program. U only have to adjust your hardware config.

Also as pointed out by Kaulquappe, have you rewired the blocks or changed the numbers?

Post a picture of the modbus parameters DB as well.

Regards.

Hi electronics26

FC5 AG_SEND and FC6 AG_RECV is used in the Modbus FB so if you have changed the numbers you need to rewire them as well.

Are you already having some communication configured on the CP??

The ID is the connection ID from Netpro and this should be different for different connections and should be used uniquely in your program.

Hope this Helps!