Siemens - Wago modbus tcp

[lapgoch]

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Hi.

I am struggling with modbus tcp between a wago 750-842 and a siemens 1214c.
My understanding is that the 750-842 defaults to a modbus server with no application program loaded.
The 1214C has MB_client configured to read the 750-842 holding registers.
But it doesn't read anything, no errors but a status 7002 (waiting for server response)
I am using Codesys v2.3 and TIA v12 to program the devices.
Attached are pics of the 750-842 and 1214C configuration.
What am I doing wrong?

 

[holgermaik]

Hi
the start address in the 842 is for MW0 12288 (&H3000)

 

[lapgoch]

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Thanks for the advice. But sadly that doesn’t work.

 

[lapgoch]

Looking at the 750-842 status webpage it shows a 0ms modbus connection timeout ,would this be an issue?

 

[lapgoch]

I tested the server / client setup with modscan simulator and found both were working as they should.
So the tried and tested method of fixing problems, ie a power cycle fixed my problem.
Also Holgemaik was almost correct the offset for MW0 is 12289.