AB7635 Devicenet Modbus TCP register mapping

Hello Community,

As a newbie modbus user, I don’t understand the mapping between Devicenet / Modbus of a fresh gateway installation.

From devicenet side, I can see the inputs

Picture1

Picture3

Question is to which registers the inputs can be read from a modbus-tcp client FC=03/04 ?

I have tried different unit / register value without any success

qmodmaster3

Thank you
Pascal

It looks like you aren’t getting any response at all from the Anybus. Make sure you can ping it on the network.

As far as the mapping goes, it depends if the device is set to Modbus Address mode or not, by default it is:

Here is the mapping for Modbus Address mode:

The data will be in the order that it was written to the DeviceNet side.

For more info, see page 18 of the Ethernet Manual.