Internal bus fault during register communication with the I/O module n (Fault code 5, argument n)

What does I/O-LED 5-n* mean?

An internal bus fault occurred specifically during attempts to communicate with the internal registers of the nth I/O module. This indicates a problem with the module's internal registers or its ability to correctly process and respond to commands over the internal bus, affecting its functionality. The module 'n' is identified by the number of blink pulses.

• Defective I/O module 'n' unable to communicate via its internal registers
• Signal integrity issue on the internal bus specifically affecting register access for module 'n'

Click steps to track your progress.

1. 1

   Switch off the supply voltage of the coupler.

2. 2

   Replace the nth module, as indicated by the blink code.

3. 3

   Switch the supply voltage on again to restart the coupler and restore communication.