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Is it possible for the ATS48/ATS22 soft starters to communicate with two or more Modbus Master devices?

Published date: 29 October 2018

Issue:
Customer wants to connect a remote keypad and a communication network to the ATS22 / ATS48 soft starter.

Product Line:
ATS22/ATS48 soft starters

Environment:
All models, All serial numbers

Cause:
Instructions for this type connection can not be found in current literature.

Resolution:
It is not possible to have an ATS22 or ATS48 connected to multiple master devices via Modbus RTU.  The ATS is a Modbus slave and as such will follow commands from a master device over the network.  The remote keypad is a modbus master and their controller on their network is also a modbus master.  It is not possible for a Modbus slave to follow commands from multiple masters simultaneously.  This type of configuration is not possible.

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