Siemens SIMATIC FM 351 Manual page 81
Positioning module
Hide thumbs
Also See for SIMATIC FM 351:
- Getting started (6 pages) ,
- Installation manual (170 pages) ,
- Getting started (20 pages)
Table of Contents
Advertisement
Encoder range covered by this encoder
–1000
–1023
SLS
2047
Value found for the
1123
Absolute encoder adjustment
0
The encoder supplies 2048 defined values. The working range is defined by the
software limit switches. Due to the selected resolution of 1 mm per pulse, the
encoder can, however, cover a larger working range than intended with the
software limit switches.
With the set resolution the working range is already covered with 2001 values.
Therefore, in the example there are 47 pulses "left over" which lie symmetrically
about the working range.
Alternative: Mechanical Adjustment of an Encoder
You can obtain a correct relationship between the coordinate system and the
encoder as follows:
1. Move the axis to a reproducible position (for example the software limit switch
start).
2. Enter this coordinate value in the machine data as the reference point
coordinate.
3. Read the encoder value displayed at this position in the service dialog of the
configuration software.
4. Enter this value as the absolute encoder adjustment in the machine data.
A correct actual value is then always displayed after parameters have been set.
Instead of steps 3. and 4., you can also set the encoder to zero with "Reset" (if this
exists) and enter the value "0" as the absolute encoder adjustment in the machine
data.
FM 351 Positioning Module
C79000-G7076-C351-02
Machine Data and Incremental Dimensions
–125
0
1798
0
1000
1024
SLE
875
8-21
Advertisement
Table of Contents
