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Unitronics PLC & HMI stop mode issue


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  • 3 months later...

Hi,...that is generally caused by noise in the system somewhere usually coming in on the I/O wires.How long has this system been in use?  Do you have VFD's connected?  Large inductive loads such as contactors or solenoids? Mostly the pcb assembly of this module has all these connections but sometimes during the installation these connections are being removed also. Make sure to check all these connections of components.

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