Rockwell Automation 1785-LTx,D17856.2.1 Classic PLC-5 Programmable Controllers Users Manual - Manual (Page 12)

Understanding Your System
Chapter 1
1-2
You can use Classic PLC-5 processors in a system that is designed for
centralized control or in a system that is designed for distributed control.
Classic PLCĆ5
Processor
1771ĆASB
Remote I/O
Adapter
1771ĆASB
Remote I/O
Adapter
Remote I/O Link
Programming Terminal
Chassis with Chassis with
Centralized control is a
hierarchical system where control
over an entire process is
concentrated in one processor.
HP 9000
or VAX
Host
Programming
Terminal with
ControlView 
Software
DH+ Link
Pyramid
Integrator
Remote I/O Link
PanelView
Operator
Terminal
Series 8600
CNC with
Remote I/O
SLC 5/01 Processor
7Ćslot Modular System
with 1747ĆDCM Module
DH+ Link
Distributed control is a system in
which control and management
functions are spread throughout a
plant. Multiple processors handle
the control and management
functions and use a Data
Highway  or a bus system
for communication.
6200 VMS
INTERCHANGE
Software
Programming
Terminal
ControlView
INTERCHANGE
Software
To DECnet



r
18084
Consider the following items as general guidelines when designing
your system.
Will your processor(s) be used in a centralized or distributed system?
What type of process(es) will be controlled by the PLC-5 system?
What processes will be controlled together?
What are the environmental and safety concerns?
What is the flow and functionality of your system?
Designing Systems