External warning 1

What does A981 mean?

An external device configured as External Event 1 (parameters 31.01 and 31.02) has generated a warning. This indicates a potential issue with external equipment or sensors that should be investigated, though it may not cause an immediate drive trip. Addressing warnings proactively prevents escalation to faults.

• Pre-alarm condition (e.g., high temperature approaching limit, low pressure warning) on the external device connected to the digital input configured by P31.01 and P31.02.
• Intermittent signal loss or noise on the sensor feedback wire from the external device, causing a transient warning trigger on the configured digital input.
• Degradation of the external sensor (e.g., proximity switch failing, pressure transducer drifting) providing an out-of-spec but non-critical signal to the drive.
• Inappropriate threshold setting for the warning trigger in the external device, leading to nuisance warnings under normal operating conditions.

Click steps to track your progress.

1. 1

   1. Identify the external device connected to the digital input specified by P31.01 (External Event 1 source).

2. 2

   2. Measure the signal voltage at the digital input terminal for the external warning to confirm its state (e.g., 24VDC, 0VDC).

3. 3

   3. Examine the external device's status and operation for any pending issues or warning indicators.

4. 4

   4. Review P31.01 (External Event 1 source) and P31.02 (External Event 1 action) to ensure the drive's response to the external signal is correctly configured for a warning.

5. 5

   5. Log the time and duration of the warning to correlate with external process events or equipment cycles.