Siemens SIMATIC FM 453, Manual

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9-92
FM 453 Servo Drive / Step Drive Positioning Module
C79000-G7076-C453-01
9.8 Digital Inputs/Outputs (Job No. 101)
Four digital inputs and four digital outputs of the FM 453 can be used specifi-
cally to a given application.
The conventions and parameterization for this purpose are defined in the ma-
chine 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 read-
back (job no. 101).
Table 9-13 shows you the functions assigned to each digital I/O.
Table 9-13 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 mea-
surement,
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
w
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 al-
ways activates
the function
Overview
Function
Parameters
Description of Functions