beautypg.com

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

Page 34

background image

2–14

How Communication Takes Place and I/O Image Table Mapping

Publication 1794ĆUM057B-EN-P - November 2001

1794ĆIE8 Series B - 8 Input Analog Module

ModuleImage

I/O Image

Input Data Channel 0
Input Data Channel 1
Input Data Channel 2
Input Data Channel 3
Input Data Channel 4
Input Data Channel 5
Input Data Channel 6
Input Data Channel 7

Underrange

Configure select

Not used
Not used
Not used
Not used
Not used

Input Size

Output Size

0 or 1 Word

1 to 9 Words

PU

1794ĆIE8/B Memory Map

Decimal

Bit

15

14

13

12

11

10

09

08

07

06

05

04

03

02

01

00

Size

Oct. Bit

17

16

15

14

13

12

11

10

07

06

05

04

03

02

01

00 Read/Write Words

S

Analog Value Channel 0

Read Word 1

S

Analog Value Channel 1

Read Word 2

S

Analog Value Channel 2

Read Word 3

S

Analog Value Channel 3

Read Word 4

S

Analog Value Channel 4

Read Word 5

S

Analog Value Channel 5

Read Word 6

S

Analog Value Channel 6

Read Word 7

S

Analog Value Channel 7

Read Word 8

PU

Not used - set to zero

U7

U6

U5

U4

U3

U2

U1

U0

Read Word 9

C7

C6

C5

C4

C3

C2

C1

C0

F7

F6

F5

F4

F3

F2

F1

F0

Write Word 1

Not used - set to 0

Write Word 2 thru 6

Where:

PU = Power up bit - included in series B modules only.

U = Underrange bits for 4Ć20mA inputs

C = Configure select bit

F = Full range bit

S = sign bit (in 2's complement)