Mitsubishi LJ61BT11 User Manual page 24

(4) Intelligent device station communication
Programmable
controller CPU
Automatic refresh
X
Automatic refresh
Y
Automatic refresh
W
Automatic refresh
W
Programmable
controller CPU
G(P).RIWT
G(P).RIRD
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The intelligent device station is a station that can handle bit and word data.
Communication between a master station and an intelligent device station uses
two types of transmission methods: cyclic transmission and transient
transmission (refer to Section 8.1.4).
(a) Cyclic transmission
Signals for handshaking with the intelligent device station (positioning start,
positioning complete, etc.) are communicated using the remote input RX and
remote output RY. Numeric data (positioning start number, present feed
value, etc.) is communicated using remote registers RWw and RWr.
Master station
Remote
input
RX
Remote
output
RY
Remote
register
RWw
Remote
register
RWr
(b) Transient transmission
Reading (G(P).RIRD) or writing (G(P).RIWT) of buffer memory data in an
intelligent device station is available at any timing.
Master station
Transient
transmission
area
Intelligent device station
Remote
Link scan
input
RX
Remote
Link scan
output
RY
Remote
Link scan
register
RWw
Remote
Link scan
register
RWr
Transient transmission
Transient transmission
1 CC-Link SYSTEM
Servo amplifier
Intelligent device station
Buffer memory
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