Siemens SIMATIC FM 452 Manual page 106

Settings
Effects on a Rotary Axis
Based on the example of a zero offset by -45 , you can see how this setting turns
the coordinate system: ACT = 25
Tool at ACT = 340
ACT = 340
180
Figure 9-1
Taking into account a ZPO
The actual value beings again at 0 at the end of the rotary axis when this is turning
in a positive direction so that the value actually calculated is 25 :
coordinate
The value end of rotary axis only needs to be subtracted when
coordinate
Loss of Synchronization
If synchronization is lost due to an error or is reset due to "retrigger reference
point", a zero offset is retained.
Canceling the Setting
By setting a zero offset of 0, you reset an existing offset.
9-8
The zero point
0
turns through
-45 degrees. All
points on the
axis receive
new coordinate
values
Rotation of the Coordinate System Resulting from a Zero Offset
= 0 a new value of 385 results.
old
= coordinate - (ZPO
new old
- (ZPO - ZPO ) will be higher than the end of the rotary axis.
old new old
Tool at ACT = 25
ZPO= -45
ACT = 25
0
180
- ZPO ) -end of rotary axis
new old
FM 452 Electronic Cam Controller
C79000-G7076-C452-04