Rockwell Automation 1794-APB/B FLEX I/O PROFIBUS Adapter Module User Manual User Manual
Page 25
2–5
How Communication Takes Place and I/O Image Table Mapping
Publication 1794ĆUM057B-EN-P - November 2001
1794ĆIB8 - 8Ćpoint Digital Input Module Image Table Mapping
Module Image
Inputs
Filter
Time
Input Size
Output Size
1 or 2 Words
0 or 1 Word
Not used
Not used
I/O Image
Read
Write
Not used
1794ĆIB8 Memory Map
Decimal Bit
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
Size
Octal Bit
17
16
15
14
13
12
11
10
07
06
05
04
03
02
01
00
Read Words
Not used
D7
D6
D5
D4
D3
D2
D1
D0
Read
Word 1
Not used
Read
Word 2
Not used
FT 00-07
Write Word 1
Where D = Input Data (D0 corresponds to input 0, D1 corresponds to input 1, etc.
DT = Input Filter Time (DT 00-07 corresponds to inputs 0 thru 7)
1794ĆIB8 Input Filter Times
Bits
Description
Selected
02
01
00 Filter Time for Inputs 00-07
Filter Time
0
0
0
Filter Time 0 (default)
512
µ
s
0
0
1
Filter Time 1
1ms
0
1
0
Filter Time 2
2ms
0
1
1
Filter Time 3
4ms
1
0
0
Filter Time 4
8ms
1
0
1
Filter Time 5
16ms
1
1
0
Filter Time 6
32ms
1
1
1
Filter Time 7
64ms