Function Parameters For Digital I/Os - Siemens SIMATIC S7-300 Manual
Fm 354 servo drive positioning module
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9.8
Digital inputs/outputs
Overview
Four digital inputs and four digital outputs of the FM 354 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 parame-
Table 9-13 shows you the functions assigned to each digital I/O.
ters
Table 9-13
34
35
1) see Section 5.3.1, Dependencies
2) Signal length
Level adjustment
36
FM 354 Servo Drive Positioning Module
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
Description of Functions
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
measurement,
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 = Aaxis 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
2)
2)
)
2)
2)
Comments
Front edge al-
ways activates
the function
9-79
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