Changing The Switchover Difference (Job 4) - Siemens simatic et 200s Operating Instructions Manual

1PosInc/Analog
4.6 Functions of the 1PosInc/Analog
4.6.12

Changing the Switchover Difference (JOB 4)

Definition
Changing the switchover difference allows you to adjust the drive control to adapt to any
changes in the load and mechanical conditions.
Supply the control interface with the new switchover difference, and activate JOB 4.
The 1PosInc/Analog accepts the preset switchover difference. The switchover difference
remains valid until the parameter assignment of the 1PosInc/Analog is changed.
Effect on the MODEs
MODE
Search for Reference
Inching
Absolute Positioning
Relative Positioning
Control Signals: Change Switchover Difference
Address
Byte 4
Bytes 5 to 7
Feedback Signals: Change Switchover Difference
Address
Byte 4
See also
CPU/Master Stop and RESET State (Page 176)
156
What Happens
-
The following responses are possible:
Distance to the destination ≤ the switchover difference
•
Switchover difference is reached or overshot; there is an immediate
reduction from rapid feed to creep feed. In this case the distance
covered in creep feed is less than (switchover difference - switch-off
difference).
Distance to the destination > the switchover difference
•
The drive is moved using rapid feed, even if it was switched over to
creep feed beforehand.
Assignment
Bits 4.7 to 4.4 :
Bit 7 6
0 1
Bit 0: JOB_REQ
Switchover difference
0 to 16 777 215
Assignment
Bit 0: JOB_ACK
5 4
JOB 4 = Change the switchover
0 0
difference
Operating Instructions, 05/2007, A5E00124871-04
ET 200S Positioning