Siemens SIMATIC FM 353, Manual

Page: 227 / 361

Description of Functions
9-27
FM 353 Stepper Drive Positioning Module
6ES7 353-1AH01-8BG0
9.2.5 MDI (Manual Data Input)
Overview
In the MDI mode it is possible to execute single positionings by way of traversing
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 that of the traversing blocks (see
Chapter 10 resp. Section 9.3.12) except that it has neither a program number nor a
block number.
The user program passes the “MDI block” (user DB, DBX38.3) to the FM 353, and
the block can then be executed. The block can be executed repeatedly, 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 processed.
Table 9-6 MDI block (see Chapter 10 for command structure)
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
dimensions
G91 Incremental
dimensions
−
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
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.