M221 is always in stop mode

[SESA684086]

Hi

I have an M221 constantly in stop mode (LED PWR is, LED RUN blinking).

When i try to start the PLC from the software EME-B, i'm getting this message : " Controller cannot change operating mode at this stage. Verify that its application is appropriate and the Run/Stop switch or input is in the correct position."

Knowing that I've tried to change the startup mode also but I'm still getting the same problem.

Thank you

[trowe]

Have you checked the physical run/stop switch is all the way in the run position (not stuck part way)?

The other possibility is an issue in the application, can you run your application in simulation?

[LeTomas]

Hi @SESA684086 ,

As @trowe  mentioned it could be the Run/Stop switch located under the coder shown in the page 67 and 68 of the Hardware Manual:

https://download.schneider-electric.com/files?p_Doc_Ref=EIO0000001384&p_enDocType=User+guide&p_File_...

Otherwise it could be that you have assigned a digital input to  be the run/stop. This can be check on the "Configuration" tab then select "Digital inputs" and check if in the column "Run/Stop" any of the digital inputs is check for this.

Best regards,

LeTomas

[SESA684086]

Thank you for your replies.

I have checked the Start/Stop switch, and it appears to be correct. I then suspected that the switch itself may be defective, so I configured an Input as Run/Stop. However, this solution did not work either.

I've tested on one line code, very simple, and it does work on simulation mode.

Best regards,

[JArce]

Speaking of this switch... Does anyone know if it's possible to disable the run/stop switch using a system bit or a special function block?