2ć13 – Rockwell Automation 1785-L20C_L40C, D17856.5.14 ControlNet PLC-5 Programmable Controllers User Manual User Manual
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Chapter 2
Planning to Use Your ControlNet
PLCĆ5 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
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
1785ĆL20C, ĆL40C
PLCĆ5/20C and Ć5/40C Programmable Controllers
Communicate with other PLCĆ5/20C or Ć5/40C
processors using scheduled or unscheduled peerĆtoĆ
peer communication
1784ĆKTC
ControlNet KTC Communication Card
Allows other computer platforms to communicate with
the ControlNet network; for programming only
1784ĆKTCx
ControlNet KTCx Communication Card
Allows other computer platforms to communicate with
the ControlNet network; supports redundant media; for
programming MMI
1770ĆKFC
ControlNet Serial/Parallel Communication Interface
Connects a serial or parallel device to a ControlNet
network; supports redundant media
1771ĆACN
1771 ControlNet I/O Adapter
Allows the PLCĆ5/20C or Ć5/40C processor remote
access to AllenĆBradley's family of 1771Ćdesignated I/O
modules via a ControlNet network; nonredundant only
1771ĆACNR
1771 ControlNet I/O Adapter
Allows the PLCĆ5/20C or Ć5/40C processor remote
access to AllenĆBradley's family of 1771Ćdesignated I/O
modules via a ControlNet network; supports redundant
media
1794ĆACN
1794 ControlNet Flex I/O Adapter
Allows the PLCĆ5/20C or Ć5/40C processor remote
access to AllenĆBradley's family of 1794Ćdesignated I/O
modules via a ControlNet network; nonredundant only
Using the ControlNet
PLCĆ5 Processor in a
ControlNet I/O System