Siemens SIMATIC FM 453, Manual

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10-3
FM 453 Servo Drive / Step Drive Positioning Module
C79000-G7076-C453-01
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.
The program is executed in ascending order of block numbers (1...255) or in
descending order if executed in reverse.
In each traversing block only one G function may be entered from each
G function group.
The following figure shows an example.
/ N G1 G2 G3 X/t F M1 M2 M3 D
400 00 100 000 10 90 43 34 10
Table 10-1 lists the possible G functions and the individual G function
groups.
Table 10-1 G Functions
G No. G Function G Function
Group
04
1)
Dwell time
87 Turn off measuring system shift for Set Actual Value On-
the-Fly
88
1)
Continuous travel for (–) for Set Actual Value On-the-Fly
1
89
1)
Continuous travel for (+) for Set Actual Value On-the-Fly
90 Absolute measure
91 Incremental dimensions
30
31
32
.
.
.
39 100% override on acceleration/deceleration
10% override on acceleration/deceleration
20% override on acceleration/deceleration
.
.
.
90% override on acceleration/deceleration
2
43 Tool offset (+)
44 Tool offset (–)
50
1)
External block change 3
60 Block change – exact positioning
64 Set actual value on-the-fly, continuous-path mode
1) These G functions take effect only on a block-by-block basis. The other G functions
remain active until canceled explicitly.
G30, G90 and G64 are the initial settings after the start of the program.
Skip Block /
Block Number N
G Function
Group 1...3
G Functions
Writing Traversing Programs