Allen-Bradley PLC-5 User Manual page 105

Supervisory Processor in Scanner Mode
a
write
outputs
b
read
inputs
Update
I/O image
Remote I/O Scan
Word
Reserved for status
0
1
2
Supervisory Processor
3
PLC-2 0X0-0X7
PLC-3 OXX0-OXX7 4
PLC-5 O:X0-O:X7
5
6
7
Word
Reserved for status
0
1
2
Supervisory Processor
3
PLC-2 1X0-1X7
PLC-3 IXX0-IXX7
4
PLC-5 I:X0-I:X7
5
6
7
Two, four, six, or eight words of data can be transferred between the scanner and the adapter channel.
The number of words is determined by the rack size specified on the Adapter Channel Configuration screen.
Discrete Data and Block-Transfer Status .
data from scanner's
output image table sent
to the input source file
Remote I/O
Buffer
data from output source
file sent to scanner's input
image table
I/O Image
Table
a b
Scanner's Output Image Table
17 14 13 10 07 04 03
Output File
Scanner's Input Image Table
17 14 13 10 07 04 03
Input File
Communicating with a PLC-5 Adapter Channel
Discrete Transfer
Configuration Files
Data Exchange
Remote I/O
Buffer
Adapter Channel's Input Destination File
00 15
Reserved for status
00 15
Reserved for status
PLC-5 Processor Channel in Adapter Mode
a
write outputs
Update
I/O image
b
read inputs
Logic
Scan
Program Scan
Integer File
12 11 08 07 04 03
Input File
Adapter Channel's Output Source File
Integer File
12 11 08 07 04 03
Output File
Publication 1785-UM012D-EN-P - July 2005
7-7
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