Siemens S7-300 - Page 108

Settings
10.3 Set zero offset
FM 352 electronic cam controller
108 Operating Instructions, 05/2011, A5E01071724-03
Data used in the channel DB
Address Name Type Initial value Comment
36.6 ZOFF_EN BOOL FALSE 1 = set zero offset
86.0 ZOFF DINT L#0 Zero offset
Effects on a linear axis
Based on the example of a zero offset of -200 mm, you can see that this setting shifts the
coordinate system in positive direction. Resultant effects:
● The working range is not physically shifted.
● The various points, such as the software limit switches, are assigned new coordinate
values.
● The cams retain their coordinate values, and are therefore located at a different physical
position.
● When the axis is synchronized and the cam processing is enabled, the actual position
may skip cam edges or complete cams as a result of this setting.
● Status changes of the cam which would normally trigger an interrupt may be lost.
Table 10- 2 Coordinate system shift as a result of zero offset
Zero offset SLS
[mm]
REF
[mm]
ACT
[mm]
SLE
[mm]
-400
-200
200
400
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-200
0
400
600
Note
For information on switching characteristics of time-based cams, refer to chapter "Influence
of settings on the sw
itching characteristics of time-based cams (Page 103)".