hello I am getting a 57h fault - Specialty I/O module has not responded to a lock shared memory command within the required limit. Fault randomly happens and can reset and run fine again but keeps coming back. we have swapped the scanner card already and still happening. I found a old print to see what it was all connected too and looks like (3) 1791 I/O (2) 1771 PLC and a PV600. The scanner card is in a 1746. So far I haven't found all the devices in the shop yet I have found (2) 1791 and (1) 1771 and the pv600 they all seem fine with no faults. Does anyone have some suggestions? have already checked connections on what ive found so far.