Speed Reference Loss (Adv. Code 0)
Vacon · X4 AC Drive
What does 22 mean?
This fault occurs when the drive's configured analog input signal, typically for speed or frequency reference, falls below a specified minimum level set by customer parameters. This indicates a loss or degradation of the command signal, potentially leading to uncontrolled operation or shutdown. The drive cannot receive proper commands.
Complete Troubleshooting Guide
- 1
Inspect the physical connections of the analog reference signal (e.g., 4-20 mA loop, 0-10 V) for breaks, shorts, loose terminals, or damaged wiring.
- 2
Verify that the drive's parameters for the analog input (e.g., minimum current/voltage threshold, signal type, scaling) are correctly configured.
- 3
Use a multimeter to measure the actual reference signal at the drive terminals to confirm it is within the expected and configured range.
- 4
Check the external control device (PLC, controller, potentiometer) providing the reference signal for proper operation and output.