Zero Offset Relative (Mode 13) - Siemens SIMATIC S5 Manual

Executing Machining Programs
The current position of 60 degrees is assigned the coordinate 400 degrees. All other position
coordinates become more positive by the difference of 400 degrees -60 degrees i.e. 340
degrees, The range limits are then no longer at 0/360 degrees but at 340/700 degrees. Absolute
target specifications must have values within this range following the coordinate transformation.
The coordinate O degrees, for example, no longer exists after the zero offset.
You can execute any number of zero offsets one after the other. A zero offset is only possible
with valid machine data but can be executed without a reference point. When the axis is cali-
brated (BA5) a zero offset is taken into account. (See Section 4.2.4 "Example of Reference Point
Approach or Set Reference Point". )
Note
I
After switching on the IP247 again, the reference point is lost, however, not the
zero offset.
If new machine data are entered to the IP247 or if existing machine data are modified, zero
offsets are cleared.

Zero Offset Relative (Mode 13)

4.3.6
In this mode, the coordinate system is displaced by a value specified in the input parameter. An
offset "forward" means that the coordinates of the software limit switches or range limits and the
reference point coordinate as well as the current actual value become more negative by the
value specified. A "reverse" offset has the opposite effect. A sign entered with the parameter is
also taken into account. The command zero offset relative -50 mm reverse causes a zero offset
of 50 mm forwards.
The same requirements, conditions and limits apply as for mode 12.
Relative zero offsets are added to zero point offsets set with "zero offset absolute".
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