Analog In Loss

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An analog input signal, which is vital for drive control, has been lost or is outside its expected range. This condition, if not addressed, can be configured (via P263 [Anlg In0 LssActn]) to stop the drive. It typically indicates a wiring issue, sensor failure, or a problem with the signal source, leading to a loss of critical control feedback.

• Loss of 4-20mA or 0-10VDC input signal due to a broken wire or disconnected terminal (e.g., 'AI0' or 'COM').
• Analog input signal voltage/current falling below the programmed minimum threshold (e.g., P260 [Anlg In0 Min]).
• External sensor or transducer failure providing the analog signal (e.g., pressure transducer outputting 0mA).
• Improper scaling of the analog input parameter (e.g., P261 [Anlg In0 Max]) causing out-of-range detection.
• Faulty analog input channel on the drive's control board.

Klikk på steg for å spore fremgangen.

1. 1

   1. Measure the voltage (0-10VDC) or current (4-20mA) at the drive's analog input terminals (e.g., 'AI0' and 'COM') to verify signal presence.

2. 2

   2. Inspect the analog input wiring for breaks, loose connections, or corrosion at both the sensor/source and drive terminals.

3. 3

   3. Verify the external sensor/transducer operation and its output signal using a calibrated multimeter at the sensor output terminals.

4. 4

   4. Check P260 (Anlg In0 Min) and P261 (Anlg In0 Max) parameters to ensure the expected analog signal range is correctly defined.

5. 5

   5. If the signal is confirmed good at the drive terminals but the fault persists, swap to an alternate analog input channel (if available) or replace the control board.

6. 6

   6. Confirm P263 (Anlg In0 LssActn) is set appropriately for the desired drive response to analog input loss.