Rockwell Automation 1794-ASB/E Remote I/O Adapter Module User Manual - Manual (Page 48)

3–14 Communicating with FLEX I/O Modules
Publication 1794ĆUM009D-EN-P - April 2004
Any combination of digital or analog modules.
Adapter
Input
Complement of modules in primary chassis, or empty for analog.
Eight terminal bases per adapter (maximum)
Adapter
20128 Four modules, 2 in the primary and 2 in the complement, represents 1 I/O group
Output Empty Empty
Complementary
Primary
Analog Analog Input Input Input Input Input
Output Output Output Output Output
I/O Group 1 I/O Group 2 I/O Group 3 I/O Group 0
8Ćpoint Complementary Addressing
00 07 10 17 00 07 10 17
0
1
2
3
4
5
6
7
I/O Group
Input Image Table Output Image Table
M0 M1 M2 M3 M4 M5 M6 M7
IL = Input Low Byte
IH = Input High Byte
OL = Output Low Byte
OH = Output High Byte
MCB = Module Control Byte
MSB = Module Status Byte
ASB/E
CĆM0 CĆM1 CĆM2 CĆM3 CĆM4 CĆM5 CĆM6 CĆM7
ASB/E
IL
OL
Primary
Comp.
IL IL
OL OL
OA8
IA8
OA8
IA8
OA8
IA8
IL
M0ĆIL
M2ĆIL
M4ĆMSB
CĆM6ĆIL
M1ĆIL
M3ĆIL
M5ĆMSB
CĆM7ĆIL
CĆM0ĆOL
CĆM2ĆOL
M4ĆMCB
M6ĆOL
CĆM1ĆOL
CĆM3ĆOL
M5ĆMCB
M7ĆOL
MCB
IA8
OA8
MCB
IE8 IE8
Empty Empty
OL OL
IL IL
OA8
IA8 IA8
OA8
Complementary 8Ćpoint Addressing Example
I/O Group 0
- up to 16 digital or 8 analog modules = 1/2 logical rack
OL
2 inputs in a group complemented by 2 outputs or empty slots
2 outputs in a group complemented by 2 inputs or empty slots
2 block transfer modules complemented by 2 empty slots
1 block transfer module and 1 input in a group complemented
by 1 empty slot and 1 output module
Legal Module Placement in 8Ćpoint Complementary
MSB MSB
Note: Shaded areas represent unavailable data
I/O groups 4-7 are available to additional adapters.
Empty slots complemented by an empty slot, input or output slot