Siemens SIMATIC FM 453, Руководство пользователя

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10-4
FM 453 Servo Drive / Step Drive Positioning Module
C79000-G7076-C453-01
A traversing block with dwell can only contain M functions and the time pa-
rameter apart from this G function.
The following applies for dwell time:
Name
Lower Input
Limit
Upper Input
Limit
Unit
Dwell time 2 100,000 ms
Odd input values are rounded upward. Dwell times take effect only on a
block-by-block basis.
If no value is input for G04 in the block, the lower input limit applies.
With G60, the exact programmed position is approached and the feed move-
ment is stopped (exact stop block change).
G64 causes the next block to be processed immediately as soon as the point
of deceleration is reached (change block on-the-fly).
G60 and G64 are mutually exclusive and self-maintaining.
M commands have no effect on G64 operation.
(For a detailed description, see Section 10.3).
The “external block change” function causes a block change on-the-fly trig-
gered by a digital input. The fast input must be parameterized with the “Ex-
ternal block change” function by way of machine data item MD34.
The function takes effect only on a block-by-block basis (no effect on G60
and G64).
The following figures show the program structure and program flow of an
example of “External block change.”
/ N G1 G2 G3 X/t F M1 M2 M3 D
10 50
20
10 000
Í
Í
Í
V
N10 N20
t
t
I
I – digital input
Dwell G04
Block Change G60,
G64 (Approach
Conditions)
External Block
Change (G50) with
Delete Residual
Path
Example of
External Block
Change
Writing Traversing Programs