Analog In Loss

Hva betyr F029 ?

An analog input, configured to fault upon signal loss, has detected the absence of its expected signal. This means the analog voltage or current signal from a sensor, potentiometer, or external controller is no longer present. This fault ensures the drive doesn't operate with an invalid or missing command signal.

• Broken wire or loose terminal connection in the analog input signal cable (e.g., AI1 terminal X10/A1+ or X10/A1-).
• Faulty external sensor, potentiometer, or PLC analog output module supplying the signal (e.g., 4-20mA, 0-10V).
• Drive parameter (e.g., P2-13 [AI1 Min Level]) set incorrectly, causing the loss detection to trigger prematurely at a valid low signal level.
• Incorrect wiring of the analog input signal (e.g., polarity reversal for current loop, missing common ground connection).
• External electromagnetic interference (EMI) on the analog signal cable causing momentary signal drops below the configured threshold.

Klikk på steg for å spore fremgangen.

1. 1

   Measure the voltage or current signal directly at the drive's analog input terminals (e.g., X10/A1+, X10/A1-) using a multimeter to verify the external signal source is active and within range.

2. 2

   Inspect the analog input signal cable for continuity, proper shielding, and secure connections from the sensor/PLC to the drive terminals (e.g., X10).

3. 3

   Verify the analog input function parameters (e.g., P2-11 [AI1 Function], P2-13 [AI1 Min Level], P2-14 [AI1 Max Level]) are correctly configured for the expected signal type and detection threshold.

4. 4

   If using a current loop (e.g., 4-20mA), ensure the loop power supply is active and providing the necessary voltage to the sensor.

5. 5

   Temporarily connect a known good reference voltage or current source (e.g., 5VDC or 12mA) to the analog input terminals to confirm the drive's input circuit functionality.