I am having trouble with a HC900 C50 CPU. It’s connected to a hakki HMI and on certain instruction performed on the screen it faults out the CPU.
I have 3 strobes on the led which in the manual indicates a CPU prefetch abort error. It says to replace the CPU which I have done but the fault occurs on the new one too.
I have replaced the HMI and comms cable between them but nothing has helped stop the fault occurring.
Any ideas on next actions welcome