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CHAPTER 8 FUNCTIONS
8
8.2 Cyclic Transmission
8.2.1 Data flow and link device assignment
8.2.1 Data flow and link device assignment
(1) Master station (safety station) and local station
Data can be written into the send range of each station's link device (RY, RWw) and can be sent to any station on
the same network.
The status data of the link devices (RY, RWw) of the master station (safety station) are stored in the link devices
(RX, RWr) of each local station.
The status data of the link devices (RY, RWw) of local stations are stored in the link devices (RX, RWr) of the
master station (safety station) and the link devices (RY, RWw) of other local stations.
• Output from the master station (safety station)
• Input from the local station
The device of the safety CPU module turns on.
The device status data of the safety CPU module is stored in the link device (RY, RWw) of the master station
(safety station) by link refresh.
The status data of the link device (RY, RWw) of the master station (safety station) is stored in the link device
(RX, RWr) of the local station by link scan.
The status data of the link device (RX, RWr) of the local station is stored in the device of the safety CPU module.
The device of the safety CPU module turns on.
The status data of the device of the safety CPU module is stored in the own station send range of the link device
(RY, RWw).
The status data of the link device (RY, RWw) of the local station is stored in the link device (RX, RWr) of the
master station (safety station) by link scan.
The status data of the link device (RX, RWr) of the master station (safety station) is stored in the device of the
safety CPU module by link refresh.
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2
4
6
5
3 7
Local station
RX, RWr
RY, RWw
Station No. 1
Local station
RX, RWr
RY, RWw
Station No. 2
Local station
RX, RWr
RY, RWw
Station No. 3
Master
station
(safety station)
Device
Device
RX, RWr
RY, RWw
M0
Y
Station No. 0
Safety CPU
module
Area for sending to
other stations
ENDEND
END
ENDEND
END
M0
Y
Send range
from
station No. 1
Send range
from
station No. 2
Send range
from
station No. 3
Sand range
to
station No. 1
Sand range
to
station No. 2
Send range
to
station No. 3
Safety CPU
module
Device
ENDEND
END
Link refresh
Device
Sequence
scan
Sequence
scan
ENDEND
END
Link refresh
Station
No. 1
Station
No. 2
Station
No. 3
Station
No. 1
Station
No. 2
Station
No. 3
Station
No. 2
Station
No. 3
Station
No. 1
Station
No. 2
Station
No. 3
Station
No. 1
Station
No. 3
Station
No. 1
Station
No. 2
Station
No. 1
Station
No. 2
Station
No. 3
Sequence Sequence
scanscan
Sequence
scan
Sequence Sequence
scanscan
Sequence
scan
Link scanLink scanLink scan
Link refresh
Link refresh
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5
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