Internal Data Bus Disruption

What does 4 (Argument: n*) mean?

An internal data bus disruption has occurred after the n-th process data module. This indicates a communication failure or malfunction involving the module at position (n+1) on the I/O bus, impacting the integrity of process data exchange. Modules that do not provide any data (e.g., supply modules without diagnostics) are ignored when determining 'n'.

• A faulty (n+1)th process data module causing bus disruption.
• Improper seating or connection of the (n+1)th module on the backplane.
• Damage to the internal data bus connectors at the (n+1)th module slot.

Click steps to track your progress.

1. 1

   Switch off the power supply to the controller.

2. 2

   Replace the (n+1)th process data module.

3. 3

   Switch the power supply back on to the controller.