Communication With The Intelligent Device Stations - Mitsubishi MELSEC Q Series User Manual

4 FUNCTIONS

4.2.4 Communication with the intelligent device stations

PLC CPU
Network
parameters
Automatic
refresh
parameters
X
Y
W
W
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This section explains an overview of the communication between the master and
intelligent device stations.
(1) Communication between the master station and intelligent device
stations by cyclic transmission
Handshaking signals with intelligent device stations (positioning complete,
positioning start. etc.) are communicated using remote input RX and remote
output RX. Numeric data (positioning start number, present feed value, etc.) is
communicated using remote register RWw and remote register RWr.
1)
3)
Automatic refresh
4)
Automatic refresh
6)
Automatic refresh
9)
Automatic refresh
Master station
Network
parameters
Buffer memory
Remote input
Link scan
RX
Remote output
Link scan
RY
Remote register
Link scan
RWw
Remote register
Link scan
RWr
MELSEC-Q
Intelligent
device station
Remote input
RX
2)
Handshaking signals
such as initial data
processing request and
positioning complete
Remote output
5)
RY
Handshaking signals
such as initial data
processing complete
and positioning start
Remote register
7)
RWw
Numeric data such
as positioning start
number and speed
change value
Remote register
8)
RWr
Numeric data such
as present feed
value and send speed
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