Siemens SIMATIC FM 453, Руководство пользователя

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9-25
FM 453 Servo Drive / Step Drive Positioning Module
C79000-G7076-C453-01
9.2.5 MDI (Manual Data Input)
In the “MDI” mode, it is possible to execute single positionings via travers-
ing blocks with relative or absolute path lengths. These traversing blocks are
provided by the user program.
The MDI block and MD block on-the-fly have an identical block structure.
The structure of the MDI block is identical to the traversing program block
(see Chapter 10, however it does not have a program number or block num-
ber).
The user program passes the “MDI block” (job no. 6) to the
FM 453, and the block can then be executed. The block can be executed re-
peatedly, since it is stored internally. The feedrate is override-dependent.
The MDI block remains in effect until it is overwritten with a new MDI
block. A new block can be transmitted while another block is being pro-
cessed.
Table 9-6 MDI Block
Name Lower Input
limit
Upper Input
Limit
Unit
Position X /
Dwell time t –1,000,000,000
2
+ 1,000,000,000
100.000
MSR from
MD7
ms
Speed F 10 500 000 000 MSR from
MD7/min
G function group 1 G04 Dwell time
G90 Absolute measure
G91 Chain measure
–
G function group 2
G30 100%
G31 10%
to
G39 90%
Override
Acceleration/
Deceleration
–
M function group 1, 2, 3
M1...17
M19...96
M99
User functions
M97, 98 Change signal is
programmed as digital
output
M2, M30 Not allowed
–
MSR stands for measurement system raster (see Section 5.3.1)
For rotary axes with absolute programming, the commands [R+], [R–] are
defined as direction commands. They must be available before positioning
starts.
Overview
MDI Block
Description of Functions