ABB · ACS800 Standard Firmware
An analog input signal (e.g., 0-10V, 4-20mA) has fallen below its configured minimum limit, which must be set to 0.5V (1 mA) or above in parameter group 13. Depending on parameter 30.01 (AI<MIN FUNCTION), the drive may trip, set a constant speed (12.16), or freeze at the last operating speed.
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Verify parameter 30.01 (AI<MIN FUNCTION) is set correctly for the desired drive reaction upon signal loss.
Measure the analog input signal at its respective terminals (e.g., AI1, AI2) to confirm it is above the set minimum limit.
Review parameter settings in group 13 (ANALOGUE INPUTS) to confirm the minimum limit is configured correctly, typically 0.5V (1mA) or above.