Siemens SIMATIC FM 351 - Page 110

Modes and Jobs
9-24
FM 351 Positioning Module
C79000-G7076-C351-02
Data Used in the Channel DB
Address Name Type Initial Value Comment
35.7 AVAL_EN BOOL FALSE 1 = set actual value
84.0 AVAL DINT L#0 Coordinate for “set actual value”
Effects of the Job
Based on the example “set actual value” to 300 mm, you can see how the job
projects the working range to a particular position of the axis. It produces the
following effects:
• The actual position is set to the value of the actual value coordinate.
• The working range is offset on the axis.
• The individual points (for example software limit switch end) within the working
range retain their original value, are located, however, at new positions.
Table 9-4 Offset of the Working Range on the Axis by “Set Actual Value“
set actual value.
SLS ACT SLE
Projection of
the working
ran
g
e by set
SLS
ACT
SLE
Axis
0
500–500
100
[mm]
Old coordinate system
-400 100 400
range
by
set
actual value to
300 mm
0
300
–500
New coordinate system
500
SLEACTSLS
-400 300 400
Canceling the Job (cancel set actual value)
With the “cancel set actual value” job, you reset all the working range offsets
caused by “set actual value”.
The sum of the working range offsets must not exceed the travel range for the job
to be executed correctly.
Data Used in the Channel DB
Address Name Type Initial Value Comment
35.3 AVALREM_EN BOOL FALSE 1 = cancel set actual value