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Influence of
Machine data can specify the output time for M functions:
M Function on
Block Change
On-the-fly
M No.
1 - Output of M10 is not position-dependent, since no relevant position for
2 – At the block change from N5 to N10, output is prepared. Output of the
3 – If two M functions are programmed in a traversing block, the first
4 – The change signal for M97 or M98 is output with the G64 block
FM 453 Servo Drive / Step Drive Positioning Module
C79000-G7076-C453-01
M function is output before or after positioning with a block change
M function output and positioning proceed in alternation.
– M function output before positioning causes exact-positioning re-
sponse in the preceding block.
– M function output after positioning causes exact-positioning response
within the block.
M function is output during positioning
M function output and positioning proceed simultaneously.
The following figure shows a sample program with M function output
"during positioning".
/
N
G1
G2
G3
5
90
10
15
20
60
V
N5
N10
1
2
3
10 000
20 000
10
20
a position-dependent M function is present.
M function does not proceed until the actual position has reached the
programmed position of N5.
M function is output depending on position, followed by the second
M function.
transition (digital output) if the actual position has reached the
programmed position of the block. The actual position runs behind
the set position (difference = overtravel).
Writing Traversing Programs
X/t
F
M1
M2
10 000
100 00
10
20 000
20
30 000
200 00
30
40 000
150 00
N20
N15
4
30 000
30
40
97
M3
D
40
97
X
40 000
10-19
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