Siemens SIMATIC S7-300 Manual page 201

9.2.5 MDI (Manual Data Input)
Overview
In the MDI mode it is possible to execute single positionings by way of tra-
versing blocks. These traversing blocks are provided by the user program.
The MDI block and MD block on-the-fly have an identical block structure.
MDI block
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 354, 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
Position X /
Dwell time t
Speed F
G function group 1
G function group 2
M function group 1, 2, 3
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.
FM 354 Servo Drive Positioning Module
MDI-Satz
Name Lower input
limit
–1,000,000,000
2
10
G04
G90
G91
G30 100%
G31 10%
to
G39 90%
M1...17
M19...96
M99
M97, 98 Change signal
programmed as digital
output
M2, M30 Not allowed
Description of Functions
Upper input limit Unit
+ 1,000,000,000 MSR from
100.000 MD7
ms
500 000 000 MSR from
MD7/min
Dwell time
–
Absolute measure
Chain measure
Override
–
Acceleration/
Deceleration
User functions
–
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