Siemens simatic et 200s Operating Instructions Manual page 353

Control Signals: Reference Signal Evaluation
Address
Byte 4
Bytes 5 to 7
Feedback Signals: Reference Signal Evaluation
Address
Byte 0
Bytes 1 to 3
Byte 4
Parameters: Reference Signal Evaluation
Parameters
Reference point run and evaluation of the reference signal
Reference signal
Reference switch
Evaluating the Reference Signal: Causes of Errors for JOB_ERR
Error Number
21
23
30
ET 200S Positioning
Operating Instructions, 05/2007, A5E00124871-04
Assignment
Bits 4.7 to 4.4 :
Bit
Bit 0: JOB_REQ
Reference point coordinates
(linear axis: 0 to 16 777 215; rotary axis: 0 to end of rotary axis - 1)
Assignment
Bit 3: SYNC
Actual value
(linear axis: 0 to 16 777 215; rotary axis: 0 to end of rotary axis - 1)
Bit 1: JOB_ERR
Bit 0: JOB_ACK
Meaning
This parameter defines the relevant
switch or the combination of switch and
zero mark.
Relevant in the case of reference signal:
Reference switch and zero mark
•
Reference switch
•
This parameter defines the referencing
direction in which the switch must be
traversed.
Meaning
Impermissible JOB at SSI encoders or in dosing
operation
ERR_ENCODER is displayed
Reference point coordinates ≥ end of rotary
axis
7 6 5 4
1 0 0 1
Value range
Reference switch and
•
zero mark
Reference switch
•
Zero mark
•
Reduction cam towards
•
minus
Reduction cam towards
•
plus
Minus limit switch
•
Plus limit switch
•
7.6 Functions of the 1PosU
JOB 9 = Evaluate the reference signal
Default setting
Reference switch and
zero mark
Reduction cam
towards minus
What to Do
Check the encoder wiring
1PosUniversal/Digital
353