alarm "emergency circuit not fed"

[subynth002]

I have problem with plc siemens that continue alarms "Emergency circuit not fed, how to fix it ? Thanks

 

[DwSoFt]

Sounds to.me that either the Emergency Stop button is pressed in or a fuse/breaker for it is open... that would be your hardwired safety interlock signal into the PLC so it's not the PLC. You. End a multimeter and to.trace some.wires.

 

[mk42]

I'm not sure where you read the alarm, but that sounds like something that would have been written by the machine builder, not one of the alarms built into the PLC.

 

[subynth002]

On the display monitor it shown message A351 - Emergency circuit not fed
And when I'd turn on some machine by clicking on the display monitor, it doesn't works. Seems like the PLC and the machines doesn't connected.

 

[Logix_Stef]

Check whether the power supplies are OK, could be a blown fuse in the control circuit. Is the PLC actually powered up? As suggested above, this sounds more like a control circuit problem than a PLC problem.