Changing The Switch-Off Difference (Job 3) - Siemens simatic et 200s Operating Instructions Manual

5.6.11

Changing the Switch-Off Difference (JOB 3)

Definition
Changing the switch-off 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 switch-off difference, and activate JOB 3.
The 1PosSSI/Digital accepts the specified switch-off difference.
The switch-off difference remains valid until the parameter assignment of the 1PosSSI/Digital
is changed.
Effect on the MODEs
MODE
Inching
Absolute Positioning
Relative Positioning
Control Signals: Change Switch-Off Difference
Address
Byte 4
Bytes 5 to 7
Feedback Signals: Change Switch-Off Difference
Address
Byte 4
See also
CPU/Master Stop and RESET State (Page 233)
ET 200S Positioning
Operating Instructions, 05/2007, A5E00124871-04
What Happens
-
Distance to the destination ≤ switch-off difference
The switch-off point is reached or overshot; positioning is switched off
immediately, and the run is terminated with POS_DONE = 1. In this case,
the destination is sometimes overshot.
Assignment
Bits 4.7 to 4.4 :
Bit 7 6
0 0
Bit 0: JOB_REQ
Switch-off difference
(linear axis: 0 to 16 777 215; rotary axis: 0...16 777 215)
Assignment
Bit 0: JOB_ACK
5.6 Functions of the 1PosSSI/Digital
5 4
JOB 3 = Change the switch-off
1 1
difference
1PosSSI/Digital
221