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Rockwell Automation 1794-APB/B FLEX I/O PROFIBUS Adapter Module User Manual User Manual

Page 26

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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