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Allen Bradley / Rockwell Automation

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Allen Bradley Modbus help

Started by Ginno, 19 Nov 2021

1 post in this topic

Posted 19 Nov 2021 (edited)

Hello all,

I am a student from Malta, currently, with my classmates we trying to communicate to the plc(micro820) via Modbus RTU RS485. We are attempting Modscan program and also C#(EasyModbus library) installed on our laptop to control and monitor the plc. We only accomplish writing the holding registers 4XXXX. We tried several times to write/read the coils/contacts with no success. Kindly could someone suggest any settings or modifications which we can do to the ladder diagram attached, please?

Thank you

ST_testing141121.ccwsln

ST_testing141121.rar

Edited 19 Nov 2021 by Ginno

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