Setting The Actual Value (Job 1) - Siemens simatic et 200s Operating Instructions Manual

4.6.10

Setting the Actual Value (JOB 1)

Definition
Setting an actual value assigns new coordinates to the actual value displayed. This moves
the operating range to a different range on the axis and synchronizes the axis.
At the switchover point the 1PosInc/Digital switches from rapid feed to creep feed, and at the
switch-off it terminates the run.
The 1PosInc/Analog sets the preset actual value coordinates to the actual value displayed in
the feedback interface and sets the feedback bit SYNC = 1.
Effect on the MODEs
MODE
Search for Reference
Inching
Absolute Positioning
Relative Positioning
Control Signals: Setting of Actual Value
Address
Byte 4
Bytes 5 to 7
ET 200S Positioning
Operating Instructions, 05/2007, A5E00124871-04
What Happens
Make sure when the reference point run is evaluated that the feedback bit
SYNC = 1 is set immediately.
The reference point run still continues to run.
-
The following responses are possible:
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.
Distance to the destination ≤ the switchover difference
•
The switchover point is reached or overshot; there is an immediate
deceleration 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 > switchover difference
•
The drive is accelerated again up to the voltage for rapid feed.
The preset distance continues to be traversed.
Assignment
Bits 4.7 to 4.4 :
Bit 7 6
0 0
Bit 0: JOB_REQ
Actual value coordinates
(linear axis: 0 to 16 777 215; rotary axis: 0 to end of rotary axis - 1)
4.6 Functions of the 1PosInc/Analog
5 4
JOB 1 = Set the actual value
0 1
1PosInc/Analog
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