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This FAQ has been written for NEAL (North East Africa and Levant) region. If you are looking for information for another region, please select the correct country from the top-left dropdown in the page and 'Navigate to Browse FAQs' in the Support menu.

Machine Expert 1.1, We can`t use %M (Write single coil) there, How to solve this?

In fact function 5 (write single %M) is not present in ESME V1.1.

Because It was an error of SoMachine V4.3 documentation, function 5 is not available on M251 modbus slave in all versions (SoMachine and ESME).

Workaround:

A possible workaround is to do a write single register - %MW (FC6).

in the controller program, you have to store this %MW in a variable and after you can read all bit of this variable with war.0, var.1....(see attached picture)


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