Writing Traversing Programs
10-11
FM 353 Stepper Drive Positioning Module
6ES7 353-1AH01-8BG0
S Incremental input G91
With incremental programming G91, the direction of rotation of the rotary axis is
defined by the sign of the position setpoint. Multiple rotations can be pro-
grammed by setting a value > 360_ as the position setpoint.
Acceleraton override G30...G39
The acceleration override is used to control acceleration and deceleration during
positioning movements. The acceleration and deceleration values are set by ma-
chine data. G30 through G39 in the traversing block can be used to achieve a per-
centage reduction in both values. These functions are modal.
G Function
30 100% override for acceleration/deceleration
31 10% override for acceleration/deceleration
to
39 90% override for acceleration/deceleration
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:
S Mode changes
S Resetting the axis with a Restart (single command)
S Changing or ending the program.
Tool compensation G43, G44
Tool compensation allows you to continue using an existing machining program,
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 off-
set number D0.
A total of 20 tool offset storage areas and tool wear storage areas are available.
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.
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