Siemens SIMATIC ET 200S - Page 353

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