Siemens SIMATIC FM 353 - Digital Inputs;Outputs (Read Request User DB, DBX43.4)

Description of Functions
9-77
FM 353 Stepper Drive Positioning Module
6ES7 353-1AH01-8BG0
9.8 Digital inputs/outputs (Read request user DB, DBX43.4)
Overview
Four digital inputs and four digital outputs of the FM 353 can be used specifically to
a given application.
The conventions and parameterization for this purpose are defined in the machine
data MD34 to MD36.
The signals are processed in the FM cycle.
The signal status of the digital inputs and outputs can be recognized by readback
(user DB, DBX43.4).
Function parameters
Table 9-9 shows you the functions assigned to each input/output.
Table 9-9 Function parameters for digital I/Os
MD
Designation Data type, bit array/meaning
34 Digital inputs
1)
I0 I1 I2 I3
0 8 16 24 = External start
2)
1 9 17 25 = Enable input
2 10 18 26 = External block change
3 11 19 27 = Set actual value on-the-fly
4 12 20 28 = Measurement (inprocess
measurement, length measurement
2)
)
5 13 21 29 = Reference point switch for
reference point approach
2)
6 14 22 30 = Reversing switch for
reference point approach
2)
35 Digital outputs
1)
Q0 Q1 Q2 Q3
0 8 16 24 = Position reached, stop
1 9 17 25 = Axis movement forwards
2 10 18 26 = Axis movement backwards
3 11 19 27 = Change M97
4 12 20 28 = Change M98
5 13 21 29 = Start enable
7 15 23 31 = Direct output
1) see Section 5.3.1, Dependencies
2) Signal length 2FM cycle
Level adjustment
MD Designation Value/Meaning Comments
36 Input adjustment 8 = I0 inverted
9 = I1 inverted
10 = I2 inverted
11 = I3 inverted
Front edge always activates
the function