How to Read Status of MM440 Profibus Option board LED and use for processing

 Hi Usman_

I;m almost certain you can't monitor the DP module LED status, however, there is a well known trick for detecting a loss of Profibus communications which I think is what you really need.

See the MM440 FAQ

You can then use the output described on pages 12 & 13 to drive a digital output or even switch over to another mode.

Regards,

Graeme