Rockwell Automation 1785-LTx,D17856.2.1 Classic PLC-5 Programmable Controllers Users Manual - Manual (Page 97)

Transferring Discrete and BlockĆTransfer Data
Chapter 8
8-2
During each remote I/O scan:
the supervisory processor transfers 2, 4, 6 or 8 words—depending on
whether the adapter-mode processor is configured as a 1/4, 1/2, 3/4 or
full rack
the adapter-mode processor transfers 2, 4, 6 or 8 words—depending on
whether the adapter-mode processor is configured as a 1/4, 1/2, 3/4 or
full rack
Supervisory Processor in Scanner Mode
Remote I/O Scan
Write Outputs
Read Inputs
PLCĆ5 Processor in Adapter Mode
Read Inputs
Write Outputs
Program Scan
Immediate I/O
IIN (y)
ProcessorĆ
Rack
Data Exchange
I/O Image
Table
x
y
Resident
Housekeeping Data
Exchange
IOT (x)
Buffer
Remote I/O
I/O Image
Table
Data Exchange
Logic
Scan
Figure 8.1 shows the transfers between supervisory processor output file
and adapter-mode processor input file as well as between adapter-mode
processor output file and supervisory processor input file.