Siemens SIMATIC ET 200S Operating Instructions

1PosUniversal/Digital
7.6 Functions of the 1PosU
ET 200S Positioning
346 Operating Instructions, 05/2007, A5E00124871-04
7.6.10 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 another part of the axis.
The axis is synchronized at incremental encoders and non-activated dosing operation.
At the switchover point the 1PosInc/Digital switches from rapid feed to creep feed, and at the
switch-off it terminates the run.
The 1PosU 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 What Happens
Search for Reference At incremental encoders and non-activated dosing operation ensure when
the reference point run is evaluated that the feedback bit SYNC = 1 is set
immediately.
The reference point run still continues to run.
Inching -
Absolute Positioning 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
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.
Relative Positioning The preset distance continues to be traversed.
Control Signals: Setting of Actual Value
Address Assignment
Bits 4.7 to 4.4 :
7 6 5 4 Bit
0 0 0 1
JOB 1 = Set the actual value
Byte 4
Bit 0: JOB_REQ
Bytes 5 to 7 Actual value coordinates
at incremental encoder (linear axis: 0 to 16 777 215; rotary axis: 0 to end of rotary
axis-1), at SSI encoder (0 to encoder range - 1)

Siemens SIMATIC ET 200S Specifications

General

Brand	Siemens
Model	SIMATIC ET 200S
Category	I/O Systems
Language	English