Multiple CPU System Communication Data Error

What does 7004 mean?

This fault indicates a data error occurring during communication between CPU modules in a multiple CPU system. It can be caused by issues in the system configuration, such as exceeding the allowed number of I/O points, or by a hardware fault within a CPU module. The error is always monitored and will lead to the CPU stopping.

• A data error occurred during communication between CPU modules.
• System configuration includes modules mounted in excess of the allowed number of I/O points.
• Potential hardware fault of a CPU module if no configuration issues are found.

Click steps to track your progress.

1. 1

   Review the entire system configuration to ensure that the number of I/O points is not exceeded.

2. 2

   Verify the integrity of communication lines and connections between all CPU modules.

3. 3

   If system configuration is correct, attempt to isolate and identify a potentially faulty CPU module by methodical testing or substitution.