1PosSSI/Analog
6.6 Functions of the 1PosSSI/Analog
ET 200S Positioning
Operating Instructions, 05/2007, A5E00124871-04
279
6.6.12 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 1PosSSI/Analog accepts the preset switchover difference. The switchover difference
remains valid until the parameter assignment of the PosSSI/Analog is changed.
Effect on the MODEs
MODE What Happens
Inching –
Absolute Positioning
Relative Positioning
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.
Control Signals: Change Switchover Difference
Address Assignment
Bits 4.7 to 4.4 :
7 6 5 4 Bit
0 1 0 0
JOB 4 = Change the switchover
difference
Byte 4
Bit 0: JOB_REQ
Bytes 5 to 7 Switchover difference
0 to 16 777 215
Feedback Signals: Change Switchover Difference
Address Assignment
Byte 4 Bit 0: JOB_ACK
See also
CPU/Master Stop and RESET State (Page 296)
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