Speed Reference Loss (Adv. Code 0)

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.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Use a multimeter to measure the actual reference signal at the drive terminals to confirm it is within the expected and configured range.

2. 4

   Check the external control device (PLC, controller, potentiometer) providing the reference signal for proper operation and output.