GSK GS2000T Series Error Err-4: The value in position deviation counter exceeds the setting value (refer to the range set by parameter PA32); (When PA137=0, detects the position deviation alarm, when PA137=1, does not detect the position deviation alarm)

AC servo drive unit · taken from the manufacturer’s manual, pages cited

Alarm codeErr-4

Position deviation counter exceeds the setting value because pulse command frequency is too high, electronic gear ratio is too large, load inertia is excessive, or motor encoder is faulty. The manual's first action is: “Check the command frequency of principal PC; check the electronic gear ratio set by PA29/PA30.”

Model
GSK GS2000T Series
Display shows
Err-4
Type
Alarm code
Source
Manual p. 119

What Err-4 means

The value in position deviation counter exceeds the setting value (refer to the range set by parameter PA32); (When PA137=0, detects the position deviation alarm, when PA137=1, does not detect the position deviation alarm) p. 119

Common causes

  • 1. The pulse command frequency is too high or the electronic gear ratio is too large; p. 119
  • 2. The load inertia is excessive or the drive unit torque is insufficient; p. 119
  • 3. Motor encoder fault or wrong encoder line number; p. 119
  • 4. The motor U, V, W phase sequence is wrong; p. 119
  • 5. The position loop or speed loop gain setting is too small (refer to parameter PA15, PA16, PA19); p. 119
  • 6. The valid range of position deviation is set too small. p. 119

What to do

  1. Check the command frequency of principal PC; check the electronic gear ratio set by PA29/PA30. p. 119
  2. 1. Motor parameter setting is wrong, call motor's default parameter; 2. Increase the drive unit and motor power; 3. Lighten the load. p. 119
  3. Check the motor encoder and its connection. p. 119
  4. Check motor wiring. p. 119
  5. Adjust the speed loop or position loop gain. p. 119
  6. Set the PA32 correctly. p. 119

If Err-4 is still not resolved

The manual gives no further instruction for this code. Open the code table in the PDF or contact GSK service.

Open the manual at page 119 All GS2000T Series error codes Manual details & download

This page summarises what the manufacturer’s manual says about Err-4; each statement links to the page it comes from, and quoted lines are copied word for word. It is not a substitute for the manual or for a qualified installer. ManualLib is not affiliated with GSK. Found a mistake? Report an error.