Mitsubishi Electric MELSEC iQ-R Series User Manual page 33

Station-based block data assurance
The cyclic data is assured for each station by handshake between the CPU module and RJ71LP21-25 for a link refresh.
■Setting method
To enable station-based block data assurance, set "Enable" under "Supplementary Cyclic Settings" in "Application Settings"
of the control station. (Page 65 Supplementary Cyclic Settings)
Once this setting is enabled on the control station, the data for all stations is assured for each station.
■Access to link devices
During a link refresh, data are assured for each station as shown below.
CPU module
Device
Data
Station No.1
assurance
Data
Station No.2
assurance
Data
Station No.3
assurance
Data
Station No.4
assurance
• Since station-based block data assurance is only applied for link refresh processing, configure an interlock
when using the direct access to link devices (J\ specification).
• When the send/receive data station-based block data assurance is set to "Enable", refer to the following
description for the formula to calculate transmission delay time. ( Page 175 Processing Time)
• If the network is configured with the MELSECNET/10 mode, station-based block data assurance is disabled
for the ACPU/QnACPU installed stations. Configure an interlock by the program for the ACPU/QnACPU
installed stations. ( Page 79 Precautions for Programming)
RJ71LP21-25
Link device
Station No.1
Station No.2
Link refresh
Station No.3
Station No.4
Data
assurance
Data
assurance
Data
assurance
Data
assurance
1.1 Cyclic Transmission Function
1
1 FUNCTIONS
31