Siemens SIMATIC FM 353 Manual page 279

External block change
Set actual value on-the-fly
Measurement
Reference point switch for reference point approach
Reversing switch for reference point approach
9.8.2 Function description for digital outputs (Write request in the
user DB, DBX39.4)
Output of PEH, FR+, FR−, SFG
The following checkback signals: position reached, stop (PEH), axis movement
forward (FR+), axis movement in reverse (FR−), and enable Start (SFG), are addi-
tionally output via digital outputs. The output assignment is parameterized by way
of MD35.
Change output M97 and M98
The change M function checkback signal (AMF) for M functions M97 and M98 can
be output as a digital output (parameterization MD35). It allows these M functions
(switching signals) to be applied without being delayed by the user cycle time.
Direct output
Outputs Q0...Q3 (D_OUT1...D_OUT4), which are defined in MD35 as "direct out-
put", can be used directly by the user program (user DB, DBX39.4) and can also
be controlled by the FM 353.
Since the same memory is used in the user DB for Write request (user DB,
DBX39.4) and Read request (user DB, DBX43.4), the jobs cannot be used simulta-
neously in the cycle.
Note
The outputs are subject to deactivation on module errors of error classes with the
response "Everything Off".
FM 353 Stepper Drive Positioning Module
6ES7 353-1AH01-8BG0
See Chapter 10
See Chapter 10 and Section 9.3.6
See Section 9.3.10
Description of Functions
See Section 9.2.3
See Section 9.2.3
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