Siemens SIMATIC S7-300 Manual page 270

Writing Traversing Programs
Acceleration over- The acceleration override is used to control acceleration and deceleration
ride G30...G39
during positioning movements. The acceleration and deceleration values are
set by machine data. G30 through G39 in the traversing block can be used to
achieve a percentage reduction in both values. These functions are modal.
G Function
30
31
to
39
Changing the acceleration override in the program prevents block change
on-the-fly. Consequently G60 response is forced in the preceding block.
The acceleration override is turned off by:
Tool compensation
Tool compensation allows you to continue using an existing machining pro-
G43, G44
gram, even when the tool dimensions have changed.
Tool offset is selected with G43 or G44, as applicable, and the tool offset
number D1...D20. Tool offset is turned off with G43 or G44, as applicable,
and the tool offset number D0.
A total of 20 tool offset storage areas and tool wear storage areas are avail-
able. The values are loaded to the module with the "Tool offset data" data
block and are saved permanently. When selected, changed or turned off, the
tool offset is not taken into account until the next positioning action.
A selected tool offset is maintained in effect until it is either turned off or
replaced with a new one. Likewise a mode or program change, or the end of
a program, will turn tool offset off.
10-10
100% override for acceleration/deceleration
10% override for acceleration/deceleration
90% override for acceleration/deceleration
Mode changes
Resetting the axis with a Restart (single command)
Changing or ending the program.
FM 354 Servo Drive Positioning Module