Modbus (TCP) slave functionality

CI867 as slave.

Access variables, defining %MW notations works fine for function code 16 (haven't sniffed the requests from the master/client, however I beleieve this is FC16).

FC16 is about writing to multiple (holding) registers.

How is the notation syntax in access variables for defining input registers (which will be read by the master/client) by function code 4?

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magneryholt Rank: 579

Asked 1 year ago

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Answers

%IW for input registers

%IX for input coils

%QX for Output coils

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Newwy72 Rank: 548

Answered 1 year ago

I just got it confirmed by L3 support that AC800M (incl CI867) does not support anything but common/ovarlaying memory block making this distinction impossible

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