Digital Inputs/Outputs (Read Request User Db, Dbx43.4) - Siemens SIMATIC FM 353 Manual

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
MD Designation
34 Digital inputs
35 Digital outputs
1) see Section 5.3.1, Dependencies
2) Signal lengthw 2
Level adjustment
MD Designation
36 Input adjustment
FM 353 Stepper Drive Positioning Module
6ES7 353-1AH01-8BG0
Function parameters for digital I/Os
1)
I0 I1 I2
0 8 16
1 9 17
2 10 18
3 11 19
4 12 20
5 13 21
6 14 22
1)
Q0 Q1 Q2
0 8 16
1 9 17
2 10 18
3 11 19
4 12 20
5 13 21
7 15 23
@
FM cycle
Value/Meaning
8 = I0 inverted
9 = I1 inverted
10 = I2 inverted
11 = I3 inverted
Description of Functions
Data type, bit array/meaning
I3
2)
24 = External start
25 = Enable input
26 = External block change
27 = Set actual value on-the-fly
28 = Measurement (inprocess
measurement, length measurement
29 = Reference point switch for
reference point approach
30 = Reversing switch for
reference point approach
Q3
24 = Position reached, stop
25 = Axis movement forwards
26 = Axis movement backwards
27 = Change M97
28 = Change M98
29 = Start enable
31 = Direct output
Front edge always activates
the function
2)
)
2)
2)
Comments
9-77