User Manual PLC-3 FAMILY I/0 Instruction Manual

I/O Communication
Chapter 3
3-4
Figure 3.1
Using
a PeertoPeer Communication Channel
Twinaxial cable for setting up
peertopeer communication channel.
15410
Slave A Master Slave B
You configure the master and slave controllers for the peer-to-peer channel
through LIST. Communication occurs via files that you specify in LIST.
Figure 3.2 shows the communication flow between master and slave
controllers on a peer-to-peer channel.
Figure 3.2
Communication
Flow Between Master and Slave Controllers on a
PeertoPeer Communication Channel
output file A
output file B
input file
output file
input file
output file
input file A
input file B
Each input file must be large enough to store the data from the
corresponding output file. Otherwise, a peertopeer communication minor
fault occurs.
Processor
Memory
Processor
Memory
Processor
Memory
Processor
Memory
Slave A Master Slave B
15411