1PosSSI/Digital
5.6 Functions of the 1PosSSI/Digital
ET 200S Positioning
222 Operating Instructions, 05/2007, A5E00124871-04
5.6.12 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/Digital accepts the specified switchover difference.
The switchover difference remains valid until the parameter assignment of the
1PosSSI/Digital 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
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
(linear axis: 0 to 16 777 215; rotary axis: 0...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 233)
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