Multiple CPU System Initial Communication Error

What does 7002 mean?

This fault signifies a failure in the initial communication process between CPU modules in a multiple CPU system. It is triggered by a lack of response from a target CPU module or the presence of an incompatible CPU module within the system. The error occurs at power ON or reset, causing the multiple CPU system to stop.

• No response received from the target CPU module during initial communication within the multiple CPU system.
• A CPU module incompatible with the multiple CPU system was mounted.
• Potential hardware fault in any of the CPU modules if the error persists after other corrective actions.

Click steps to track your progress.

1. 1

   Reset the CPU module and attempt to transition it to RUN mode again.

2. 2

   Remove any CPU module identified as incompatible with the multiple CPU system from the main base unit.

3. 3

   Replace any CPU module incompatible with the multiple CPU system with a compatible one.

4. 4

   Verify all communication cabling between CPU modules for proper connection and integrity.