Moving The Encoder Range (Job 2) - Siemens simatic et 200s Operating Instructions Manual

1PosSSI/Digital
5.6 Functions of the 1PosSSI/Digital
5.6.10

Moving the Encoder Range (JOB 2)

Definition
When the encoder range is moved, the encoder value is adjusted so that the actual value
displayed corresponds to the real actual value. Before this can be done, any active run must
be terminated.
Supply the control interface with the offset, and activate JOB 2.
You calculate the offset as follows:
● Offset = displayed actual value - real actual value
If the offset is negative, proceed as follows:
● Offset = displayed actual value - real actual value+
The 1PosSSI/Digital accepts the preset offset and displays the real actual value coordinates
at the feedback interface.
Effect on the MODEs
MODEs are not affected by JOB 10.
Control Signals: Move Encoder Range
Address
Byte 4
Bytes 5 to 7
Feedback Signals: Move Encoder Range
Address
Bytes 1 to 3
Byte 4
Move Encoder Range: Causes of Errors for JOB_ERR
Error Number
23
26
33
220
(number of rotations * number of increments)
Assignment
Bits 4.7 to 4.4 :
Bit
Bit 0: JOB_REQ
Offset
(0 to encoder range)
Assignment
Actual value
(0 to encoder range - 1)
Bit 1: JOB_ERR
Bit 0: JOB_ACK
Meaning
ERR_ENCODER is displayed
JOB 2 (move encoder range) cannot be
initiated because there is an active run
With JOB 2: Offset not in encoder range
7 6 5 4
0 0 1 0
JOB 2 = Move encoder range
What to Do
Check the encoder wiring
Operating Instructions, 05/2007, A5E00124871-04
ET 200S Positioning