Following error (tolerance exceeded)

What does P03 mean?

This fault indicates that the actual position or speed of the motor has deviated from the commanded set-point by more than an acceptable tolerance. This typically suggests a dynamic control issue, insufficient motor torque, or mechanical problem. By default, this condition is configured as a "Message without pulse inhibit", meaning it alerts the operator and is logged, but it does not stop the drive. However, persistent following errors can indicate a problem affecting process quality or system wear.

• Insufficient motor torque or acceleration capability for the load requirements (e.g., P2-01 Motor rated torque set too low).
• Incorrectly tuned PID controller gains (e.g., P3-10 Proportional gain too low, P3-11 Integral gain too low) resulting in sluggish response.
• Excessive or sudden mechanical load changes exceeding the drive's dynamic capabilities.
• Feedback encoder malfunction or intermittent signal loss (e.g., loose encoder cable at terminal X4 causing pulse dropouts).
• Motor brake failing to release completely, creating mechanical drag on the motor shaft.

Click steps to track your progress.

1. 1

   Monitor the motor current (A) and actual speed (RPM) against commanded values using the drive's diagnostic display.

2. 2

   Increase P2-01 (Current limit) by 5-10% if the motor current consistently reaches the limit during acceleration phases.

3. 3

   Adjust P3-10 (Proportional gain) in 5% increments, observing system response for stability and overshoot.

4. 4

   Verify mechanical system for binding, excessive friction, or backlash by manually moving the axis with power off.

5. 5

   Check encoder signal integrity using an oscilloscope at terminal X4; look for dropouts or noise on A/B/Z signals.

6. 6

   Measure the current drawn by the motor brake coil (A) to ensure it releases fully when commanded.