Siemens SIMATIC FM 453 Manual page 292

Description of Functions
9.8 Digital Inputs/Outputs (Job No. 101)
Overview
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).
Function Table 9-13 shows you the functions assigned to each digital I/O.
Parameters
Table 9-13
34
35
1) see Section 5.3.1, Dependencies
2) Signal length
Level adjustment
36
9-92
Function Parameters for Digital I/Os
MD Designation
1)
Digital inputs I0
0
1
2
3
4
5
6
1)
Digital outputs Q0
0
1
2
3
4
5
7
2 FM cycle
MD Designation
Input adjustment 8 = I0 inverted
9 = I1 inverted
10 = I2 inverted
11 = I3 inverted
Data Type, Bit Array/Meaning
I1 I2 I3
8 16 24 = External start
9 17 25 = Enable input
10 18 26 = External block change
11 19 27 = Set actual value on-the-fly
12 20 28 = Measurement (inprocess mea-
surement,
length measurement
13 21 29 = Reference point switch for
reference point approach
14 22 30 = Reversing switch for
reference point approach
Q1 Q2 Q3
8 16 24 = Position reached, stop
9 17 25 = Axis movement forwards
10 18 26 = Axis movement backwards
11 19 27 = Change M97
12 20 28 = Change M98
13 21 29 = Start enable
15 23 31 = Direct output
Value/Meaning
FM 453 Servo Drive / Step Drive Positioning Module
C79000-G7076-C453-01
2)
2)
)
2)
2)
Comments
Front edge al-
ways activates
the function