Rockwell Automation 1794-APB/B FLEX I/O PROFIBUS Adapter Module User Manual User Manual
Page 26
2–6
How Communication Takes Place and I/O Image Table Mapping
Publication 1794ĆUM057B-EN-P - November 2001
1794ĆIB16 - 16Ćpoint 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
Filter
Time
Read
Write
1794ĆIB16 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
D15 D14 D13 D12 D11 D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
Read
Word 1
Not used
Read
Word 2
Not used
FT 12-15
FT 00-11
Write Word 1
Where D = Input Data (D0 corresponds to input 0, D1 corresponds to input 1, etc.
DT = Input Filter Time (FT 00-11 corresponds to inputs 0 thru 11; FT 12-15 corresponds to inputs 12 thru 15)
1794ĆIB16 Input Delay Times
Bits
Description
S
02
01
00 Filter Time for Inputs 00-11
Selected
Filter Time
05
04
03 Filter Time for Inputs 12-15
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