Analog Input Loss

Hva betyr F29 ?

This fault occurs when an analog input, configured to fault upon signal loss, loses its expected input signal. This means the drive is no longer receiving a valid reference from the analog source (e.g., 0-10V or 4-20mA). This is an Auto-Reset/Run type fault configurable with parameters A092 and A093.

• Break or poor connection in the analog signal wiring (e.g., 4-20mA loop, 0-10VDC source) to the drive input terminals (e.g., AIN1).
• Failure of the external analog signal source device (e.g., pressure transducer, potentiometer) not providing a valid output.
• Incorrect configuration of analog input parameters (e.g., P065 [Analog In Loss Act]) on the drive, triggering a fault too sensitively.
• Loss of the 24VDC power supply to the analog sensor or transducer, preventing it from generating a signal.
• Damaged analog input module or internal circuit on the drive itself.

Klikk på steg for å spore fremgangen.

1. 1

   Measure the voltage (for 0-10V) or current (for 4-20mA) at the drive's analog input terminals (e.g., AIN1, AIN2) using a multimeter.

2. 2

   Verify the integrity of the analog input signal wiring by checking continuity and insulation resistance from the signal source to the drive terminals.

3. 3

   Confirm drive parameter P065 [Analog In Loss Act] is set to the desired fault action (e.g., 'Fault') and its trip level.

4. 4

   Inspect the external analog signal source device (e.g., transducer) for power supply and proper operation, measuring its output directly.

5. 5

   Check the drive's internal diagnostics for real-time analog input values to differentiate between external signal loss and drive input circuit failure.