User Manual Owner manual

Chapter 2
Planning to Use Your ControlNet
PLC5 Processor
2-13
To communicate between any ControlNet PLC-5 processors on the
ControlNet network, you can include explicit MSG instructions in
your ladder-logic program. See pages 4-2 and C-1 for more information.
There can be only one PLC-5/20C or -5/40C processor updating I/O
adapters on a ControlNet network.
the PLC-5/20C or -5/40C processor updating the I/O adapters must
be at network address 01—this is the “controlling” processor
only the controlling processor is allowed to send CIO instructions
additional PLC-5/20C or -5/40C processors can do scheduled transfers
to the PLC-5/20C or -5/40C processor at node 01 by using peer-to-peer
communications through the map table, but they cannot directly
communicate with or control the ControlNet remote I/O
In addition to your controlling processor, you can attach the following
ControlNet devices to your network:
Catalog Number(s) Device(s) Function
1785L20C, L40C
PLC5/20C and 5/40C Programmable Controllers Communicate with other PLC5/20C or 5/40C
processors using scheduled or unscheduled peerto
peer communication
1784KTC ControlNet KTC Communication Card Allows other computer platforms to communicate with
the ControlNet network; for programming only
1784KTCx ControlNet KTCx Communication Card Allows other computer platforms to communicate with
the ControlNet network; supports redundant media; for
programming MMI
1770KFC ControlNet Serial/Parallel Communication Interface Connects a serial or parallel device to a ControlNet
network; supports redundant media
1771ACN 1771 ControlNet I/O Adapter Allows the PLC5/20C or 5/40C processor remote
access to AllenBradley's family of 1771designated I/O
modules via a ControlNet network; nonredundant only
1771ACNR 1771 ControlNet I/O Adapter Allows the PLC5/20C or 5/40C processor remote
access to AllenBradley's family of 1771designated I/O
modules via a ControlNet network; supports redundant
media
1794ACN 1794 ControlNet Flex I/O Adapter Allows the PLC5/20C or 5/40C processor remote
access to AllenBradley's family of 1794designated I/O
modules via a ControlNet network; nonredundant only
Using the ControlNet
PLC5 Processor in a
ControlNet I/O System