Output dark test error

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During an output dark test, the expected test pulses were not detected. This signifies that the output circuit did not respond correctly to a diagnostic test, potentially due to wiring faults, issues with connected devices, or an internal hardware problem.

• An unused output terminal is not configured with 'Not used' in 'Wiring output selection'.
• Faulty connected devices or incorrect wiring on the output terminal.
• Influence from electrical noise affecting the output dark test pulses.
• An internal hardware error within the I/O module with diagnostic functions.

Klicken Sie auf Schritte, um Ihren Fortschritt zu verfolgen.

1. 1

   For any unused output terminals, ensure 'Not used' is selected for 'Wiring output selection'.

2. 2

   Identify the specific terminal experiencing the error using 'Output dark test error detection state' (Un\G1540), then inspect and adjust connected devices and wiring.

3. 3

   Implement measures to mitigate electrical noise, such as shielding cables or isolating power supplies.

4. 4

   If the error persists after noise mitigation, the module may require replacement due to a hardware failure.