Mitsubishi Electric MELSEC iQ-R Series User Manual page 38

Station-based block data assurance
Cyclic data is assured for each station by handshake between the CPU module and the RJ71GN11-T2 for a link refresh. The
link device is assured as follows.
• RX, RY, RWw, and RWr data are assured for each station
• LB and LW data are assured for each station
■Setting
Set station-based block data assurance under "Supplementary Cyclic Settings" in "Application Settings" of the master station.
( Page 109 Application Settings)
Once this setting is enabled on the master station, the data for all stations is assured for each station.
■Access to link devices
During a link refresh, data is assured for each station as shown below.
CPU module
Device
Data Station
assurance No.1
Data Station
assurance No.2
Data Station
assurance No.3
Data Station
assurance No.4
■Precautions
RX, RY, RWw, and RWr data cannot be assured for each station with LB and LW data.
Interlock program
Data of more than 32 bits can be assured without using the station-based block data assurance setting. Use either of the
following methods:
• Data assurance by handshake of the remote I/O
• Data assurance by handshake of the remote register
• Data assurance by handshake of the link relay
■Data assurance by handshake of the remote I/O
An example of sending data in W0 to W3 of the master station (station No.0) to W1000 to W1003 of the local station (station
No.1) is shown below. (X1000 and Y1000 are used for a handshake to the CPU module.)
No.0
RJ71GN11-T2
• Data flow
Send
request
Send data (W)
SET Y1000
1 FUNCTIONS
36
1.1 Cyclic Transmission
RJ71GN11-T2
Link device
Link refresh
No.1
RJ71GN11-T2
CPU Master
module station
Y1000
X1000
W0
W1000
Station Data
No.1 assurance
Station Data
No.2 assurance
Station Data
No.3 assurance
Station Data
No.4 assurance
Local
station
RY0 RY0
RX0
RX0
RWw0 RWw0
RWr0 RWr0
CPU
module
X1000
Y1000
Receive data (W)
X1000
W0
Cyclic transmission
Link refresh
W1000