Overview Of Communication - Mitsubishi Electric L26CPU-BT User Manual

1.2

Overview of Communication

The overview of CC-Link communication is described below.
(1) Remote I/O station communication
The remote I/O station is a remote station that handles bit data only.
The ON/OFF information of a switch or indicator lamp is sent or received using the remote input RX and remote
output RY (refer to
Programmable
controller CPU
Automatic refresh
X
Automatic refresh
Y
(2) Remote device station communication
The remote device station is a remote station that handles bit and word data.
Signals for handshaking with the remote device station (initial request, error occurred flag, etc.) are
communicated using the remote input RX and remote output RY.
The setting data to the remote device station are communicated using remote registers RWw and RWr (refer to
Page 113, Section 8.1.2).
Programmable
controller CPU
X
Y
W
W
Page 110, Section 8.1.1).
Master station
Remote input
RX
Remote output
RY
Master station
Remote
Automatic refresh
input
(RX)
Remote
Automatic refresh
output
(RY)
Remote
Automatic refresh
register
(RWw)
Remote
Automatic refresh
register
(RWr)
Remote I/O station
Link scan
Input
Link scan
Output
Remote device station
Remote
Link scan
input
(RX)
Remote
Link scan
output
(RY)
Remote
Link scan
register
(RWw)
Remote
Link scan
register
(RWr)
CHAPTER 1 FEATURES
1
V
Voltmeter
19