1747-asb module 1 i/o mapping details -21, Plc processor input image, Plc processor output image – Rockwell Automation 1747-ASB Remote I/O Adapter User Manual
Page 125
Publication 1747-UM006B-EN-P - June 2003
Application Examples 8-21
1747-ASB Module 1 I/O Mapping Details
Because 1747-ASB module 1 is configured for 2-slot addressing, has
eight logical groups and 16 I/O slots available, all of the slots present
are mapped into the PLC-5/40 image. No extra slots in the chassis or
extra words in the image remain. Each slot is assigned one byte in the
PLC-5/40 input and output images.
1747-ASB module 1 is configured for block transfer specialty I/O
mode. Therefore, all specialty I/O modules are block transfer mapped.
If specialty I/O modules are used, their paired slots can only use
8-point (or smaller) discrete input, discrete output, or block transfer
mapped specialty modules, as shown below. 16-point discrete output
modules can be used if their paired slots have discrete (16-point or
less) input modules in them, as shown below. 32-point modules
cannot be used with 2-slot addressing.
0
1
2
3
4
5
6
7
8
9 10
11 12 13
14 15 16
ASB 1
1746-NIO4V
1746-OW8
1746-OW16
1746-IA16
1746-OG16
1746-IG16
1746-OW8
1746-OV8
1746-OB16
1746-IB16
1746-OA8
1746-NO4V
1746-OW16
1746-IA16
1746-OV16
1746-IV16
Slot Pair
1
2
3
4
6
7
8
5
Bit Number
Octal
Logical
Rack 1
0
7
10
17
Logical
Rack 2
PLC Processor Input Image
Group 0
Group 1
Group 2
Group 3
Group 4
Group 5
Group 6
Group 7
Group 0
Group 1
Group 2
Group 3
Group 4
Group 5
Group 6
Group 7
1747-ASB
Module 1
NIO4V
IA16
IA16
IG16
IG16
Bit Number
Octal
Logical
Rack 1
0
7
10
17
Logical
Rack 2
PLC Processor Output Image
Group 0
Group 1
Group 2
Group 3
Group 4
Group 5
Group 6
Group 7
Group 0
Group 1
Group 2
Group 3
Group 4
Group 5
Group 6
Group 7
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
IB16
IB16
NO4V
IA16
IA16
IV16
IV16
Not Used
Not Used
1747-ASB
Module 1
NIO4V
OW16
OW16
OG16
OG16
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
OB16
OB16
NO4V
OW16
OW16
OV16
OV16
Not Used
Not Used
OW8
OV8
OW8
OA8
I:010
I:01 1
I:012
I:013
I:014
I:015
I:016
I:017
I:020
I:021
I:022
I:023
I:024
I:025
I:026
I:027
O:010
O:01 1
O:012
O:013
O:014
O:015
O:016
O:017
O:020
O:021
O:022
O:023
O:024
O:025
O:026
O:027