Siemens SIMATIC S5 Manual page 129

IP 266
The direction of the tool offset is determined by
• the sign of the offset value and
• the Start function ("Forward" or "Reverse")
Table 5-16. Coordinate Changes Produced by a Tool Offset
Sign of the
Start function
value
Positive Forward
Negative Forward
Positive Reverse
Negative Reverse
Following a tool offset, the position of the new tool tip is always displayed as
actual position. The tool offset is taken into account when a target position is
specified.
The range of the software limit switches is recomputed following a tool offset.
Use the following formulas as basis for specification of a tool offset:
In a negative direction:
- Tool offset 32767.999 - |Software end limit switch|
In a positive direction:
Tool offset 32767.999 - |Software start limit switch|
The IP 266 does not execute a tool offset outside the permissible range limits.
EWA 4NEB 812 6057-02
Machine Data, Modes and Traversing Programs
Coordinates become
more positive
more negative
more negative
more positive
5-57