Cause : PID Control Selection Fault comes when PID control function selection is incorrect. Requires that PID control is enabled (b5-01 = 1 to 4).

1. The following simultaneous contradictory settings have occurred:
• b5-15 is not set to 0.0 (PID Sleep Function Operation Level)
• The stopping method is set to either DC Injection Braking or coast to stop with a timer (b1-03 = 2 or 3).

2. Set b5-15 to a value other than 0.0.

3. Set the stopping method to coast to stop or ramp to stop (b1-03 = 0 or 1).

4. b5-01 is set to 1 or 2, enabling PID control, but the lower limit for the frequency reference (d2-02) is not set to 0 while reverse output is enabled(b5-11 = 1). 

5. b5-01 is set to 3 or 4, enabling PID control, but the lower limit for the frequency reference (d2-01) is not 0.