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Configure Your Input Module
You configure your input module by setting bits in the configuration word (word 3).
Table 2 - Image Table Memory Map for 1794-IV16
Dec
15
14
Oct
17
16
Read 0
I15
I14
Read 1
C = Counter Input value of input 15
Write 1
Not used
I = Input
C = Counter value for input 15
FT = Input filter time
Where
CR = Counter Reset
CF = Counter Fast - where 1 = Fast input (raw) data; 0 = Standard input filtered data
NU = Not used
Note: C, CR, and CF not available when used with any series 1794-ASB or 1794-ASB2 Remote I/O Adapters.
Set the Input Filter Time for 1794-IV16 Module
To set the input filter time, set the associated bits in the output image (complementary word) for the module.
For example, to set a filter time of 8 milliseconds for a DC input module at address rack 1, module group 0, in configuration word 3, set bits 08, 09, and 10 as shown in
Figure 3 - Example Filter Time Setting
See
Table 3
for additional filter times available.
Table 3 - Input Filter Time
Bits
Description
10
09
08
Filter Time for inputs 00...15 (00...17)
0
0
0
Filter Time 0 (Default)
0
0
1
Filter Time 1
0
1
0
Filter Time 2
0
1
1
Filter Time 3
1
0
0
Filter Time 4
1
0
1
Filter Time 5
1
1
0
Filter Time 6
1
1
1
Filter Time 7
13
12
11
10
15
14
13
12
I13
I12
I11
I10
CF
CR
NU
Input Filter FT 0...15
15 14 13 12 11 10
09 08 07 06 05 04 03 02 01 00
O:010
FT = 00...15
Write Filter Time on system startup.
I:000
00
15 14 13 12 11 10
09 08 07 06 05 04 03 02 01 00
O:010
1
0
1
FT for channels 00 thru 15
Selected Filter Time
0.25 ms
0.5 ms
1 ms
2 ms
4 ms
8 ms
16 ms
32 ms
Rockwell Automation Publication 1794-IN095B-EN-P - July 2021
FLEX I/O Digital Sourcing Input and Sinking Output Modules Installation Instructions
9
8
7
6
11
10
7
6
I9
I8
I7
I6
Not used
Dec.
Write FT to complement
FLL
of input module.
Fill File
1280
Source
#O:010
Destination
1
Length
Dec.
= 2400 Octal or
1280 Decimal
5
4
3
2
5
4
3
2
I5
I4
I3
I2
1
0
1
0
I1
I0
Table
3.
7
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