Tool Offset; G Functions - Siemens SIMATIC S7-300 Manual

Skip block / Program blocks which are not to be executed every time the program runs
can be identified as skippable blocks by an oblique "/ ". When the program
is being processed, the "Skip block" control signal can be used to decide
whether skippable blocks are to be skipped. The last block cannot be skip-
pable.
Block number N The program is executed in ascending order of block numbers, from 1 to 255,
or in descending order if executed in reverse.
G function In each traversing block only one G function may be entered from each
group 1...3
G function group.
The following figure shows an example.

G functions

Table 10-1 lists the possible G functions and the individual G function
groups.
Table 10-1
04
87
88
89
90
91
30
31
32
.
.
.
39
43
44
50
60
64
1) These G functions take effect only on a block-by-block basis. The other G functions
G30, G90 and G64 are the initial settings after the start of the program.
FM 354 Servo Drive Positioning Module
/ N G2 G3
G1
10 90 34 43
G functions
G No.
1)
Dwell time
Turn off measuring system shift for Set Actual Value On-
the-Fly
1)
Continuous travel for (–) for Set Actual Value On-the-Fly
1)
Continuous travel for (+) for Set Actual Value On-the-Fly
Absolute measure
Chain measure
100% override on acceleration/deceleration
10% override on acceleration/deceleration
20% override on acceleration/deceleration
.
.
.
90% override on acceleration/deceleration

Tool offset (+)

Tool offset (–)
1)
External block change
Block change – exact positioning
Set actual value on-the-fly, continuous–path mode
remain active until canceled explicitly.
Writing Traversing Programs
X/t F M1
100 000 400 00
G Function
M3 D
M2
10
G Function
group
1
2
3
10-3