Hi Experts,

I have currently a Project with my CPU 1512SP as slave and DCS Yokogawa APP 121 as Master via Profibus DP.
It worked well from both side.
But now the customer (DCS side) want to the PLC must running when the Profibus Connection errors come. Like when they plug out the Profibus jack then my PLC have to take the previos value and status signals before disconection and keep running with the error.
About the status and value i 've know already how to keep it. But the PLC will be stopped when the Profibus DP error come. How can i configure the Profibus DP in this case ? 

Many thanks and best regards

Thong Nguyen