EEr

What does 091 mean?

External monitoring has been triggered via the DCTRL input. A digital signal assigned to the TRIP-SET function has been activated.

• External safety device activation: A connected safety circuit (e.g., emergency stop button, safety gate switch, overload relay) wired to the DCTRL input (e.g., X5/DCTRL1) has been activated.
• Misconfigured DCTRL input: The DCTRL input (e.g., P5-01 for DCTRL1 function) is incorrectly assigned to a TRIP-SET function, or its polarity (normally open/closed) is wrong.
• Faulty external contact: The external contact connected to the DCTRL input is sticking, has failed closed/open, or has an intermittent fault, sending an erroneous trip signal.
• Wiring fault: A short circuit to ground or to an auxiliary voltage (e.g., 24VDC) on the DCTRL input wiring, activating the TRIP-SET function.
• Signal noise: Electromagnetic interference (EMI) injecting a false trigger signal onto the DCTRL input line, especially if cables are unshielded or poorly routed.

Click steps to track your progress.

1. 1

   Identify all external devices connected to the DCTRL input (e.g., X5/DCTRL1) and physically verify their status (e.g., emergency stop released, safety gate closed, overload relay reset).

2. 2

   Using a multimeter, measure the voltage level at the DCTRL input terminal (e.g., X5/DCTRL1 relative to X5/GND) to confirm if the signal is active (e.g., 0V or 24V) as expected for a trip.

3. 3

   Review the parameter assigning the function to the DCTRL input (e.g., P5-01 for DCTRL1); ensure it is correctly configured for its intended purpose and not mistakenly set to TRIP-SET.

4. 4

   Disconnect the wiring from the DCTRL input terminal (e.g., X5/DCTRL1) and observe if the error clears, which would indicate an issue with the external wiring or device.

5. 5

   Check the wiring for the DCTRL input for any damage, shorts, or loose connections, and ensure adequate shielding if it's a long run in an electrically noisy environment.