SPLC-CC%2: Cross comparison failed, output %4

What does 231-A006 mean?

This error indicates a failure in the cross-comparison of SPLC-CC outputs. It occurs when the Safety PLC (SPLC) program of the CC[x] defines an output as 0 (LOW), but the value read from the terminal for that output is 1 (HIGH), suggesting a discrepancy between commanded and actual output states.

• Error in the cross comparison of the SPLC-CC outputs.
• SPLC program of the CC[x] defines the output as LOW (0), but the terminal value is HIGH (1).
• Incorrect wiring of the output, potentially causing it to be pulled HIGH.
• SPLC program logic issue where output signals do not remain stable for at least 2 SPLC cycles.

Click steps to track your progress.

1. 1

   Check the physical wiring of the faulty output (indicated by %4) for any short circuits, external voltage sources, or incorrect connections.

2. 2

   Review the SPLC program logic for the affected output to ensure signals for setting and resetting the output remain stable for a minimum of 2 SPLC cycles.

3. 3

   Verify the output module's functionality and its ability to correctly switch between LOW and HIGH states.

4. 4

   Measure the voltage at the output terminal to confirm the actual state when commanded LOW and HIGH by the SPLC.