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Hi all, currently as part of a project I am trying to communicate between a Schneider M340 plc and an Allen Bradley micrologix processor. I am programming the M340 and the micrologix has been installed by another supplier. they have mapped the Modbus registers on their side and given me a spreadsheet with these. I am able to read values with no issue but I cannot write values back. i've included a screenshot or the read_var and write_var instructions I am using. I would really appreciate any help if anyone has any insight on this Mark