Mitsubishi Electric L26CPU-BT User Manual page 22

(3) Local station communication
The local station is a station having a programmable controller CPU and the ability to communicate with the
master and other local stations.
Communication between a master station and a local station uses two types of transmission methods: cyclic
transmission and transient transmission (refer to
(a) Cyclic transmission
Data communication between programmable controller CPUs can be performed in N:N mode using bit data
(remote input RX and remote output RY) and word data (remote registers RWw and RWr).
Programmable
controller CPU
Automatic refresh
X
Automatic refresh
Y
Automatic refresh
W
Automatic refresh
W
(b) Transient transmission
Read (G(P).RIRD) or write (G(P).RIWT) operation of the local station buffer memory and CPU device can be
performed at any timing.
Programmable
controller CPU
G(P).RIW T
G(P).RIRD
20
Master station
Remote
Link scan
input
(RX)
Remote
Link scan
output
(RY)
Remote
Link scan
register
(RWw)
Remote
Link scan
register
(RWr)
Master station
Transient transmission
Transient transmission
Transient
transmission
Transient transmission
area
Transient transmission
Page 118, Section 8.1.3).
Local station
Remote
Automatic refresh
output
(RY)
Remote
Automatic refresh
input
(RX)
Remote
Automatic refresh
register
(RWr)
Remote
Automatic refresh
register
(RWw)
Local station
Transient
transmission
area
Buffer
memory
Programmable
controller CPU
Y
X
W
W
Programmable
controller CPU
W