Wrong signal source polarity

What does SP mean?

This fault indicates that the polarity of an analog input signal (e.g., set-value, feedback) is inverted or incorrect, causing the drive to interpret the signal incorrectly. By default, this condition triggers a full TRIP, inhibiting all ignition pulses and resetting the Ready signal, as incorrect polarity can lead to unstable or dangerous operation. Manual reset is required.

• Inverted wiring for an analog input (e.g., 0-10VDC signal where positive and negative terminals are swapped).
• Incorrect parameter setting for analog input polarity (e.g., P6-03 set to inverted when it should be normal).
• Swapped direction feedback for an incremental encoder (e.g., A/B phases are reversed, P5-03 set incorrectly).
• PID controller output polarity mismatch with the actuator's physical response (e.g., P3-14 Output polarity).
• Faulty sensor or feedback device providing an inverted signal.

Click steps to track your progress.

1. 1

   Identify the specific analog input (e.g., terminal X7) or feedback (e.g., terminal X5) generating the fault.

2. 2

   Verify the physical wiring of the identified input/feedback against the drive's wiring diagram for correct polarity.

3. 3

   Check the relevant drive parameter for signal polarity (e.g., P6-03 for analog input 1 polarity, P5-03 for encoder rotation direction).

4. 4

   Apply a known positive test signal (e.g., +5VDC) to the input and observe the drive's measured value (e.g., using a diagnostic screen); if it reads negative, swap polarity.

5. 5

   If using a bipolar input (e.g., -10V to +10V), ensure the zero-crossing reference is correctly wired.