Siemens simatic et 200s Operating Instructions Manual page 77

Search for reference: Causes of Errors for POS_ERR
You must find out the causes of errors with JOB 15 (displays current values).
Error Number Cause
2 ERR_2L+ is displayed
3 ERR_ENCODER is displayed
10 Search for reference: Reference point
coordinates ≥ end of rotary axis
11 Search for reference: No reference signal found
up to the limit switch or between the limit switches
13 Direction of rotation of the drive and the encoder
varies
ET 200S Positioning
Operating Instructions, 05/2007, A5E00124871-04
3.6 Functions of the 1PosInc/Digital
What to Do
Check the load voltage (2L+) at terminal 15
Check the encoder wiring
Check your switches, the encoder and the wiring
Check the wiring of the drive and the encoder as
well as the reversal of the direction of rotation
parameter
1PosInc/Digital
77