Mitsubishi L26CPU-BT, User Manual

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8 FUNCTIONS
(2) Communication between the master and intelligent device stations
by transient transmission
Transient transmission is one of the transmission methods, and by which data
are sent or received at any timing on a one-to-one basis (1:1) by specifying the
target.
[Writing data to the buffer memory in the intelligent device station
using the G(P).RIWT instruction]
1) Data to be written to the buffer memory in an intelligent device station is
stored in the send buffer in the master module.
2) The data is written to the buffer memory in the intelligent device.
3) The intelligent device returns a writing complete response to the master
station.
4) The devices specified with the G(P).RIWT instruction are turned on.
Intelligent device station
Programmable controller CPU
G(P).RIWT
Buffer memory
Device memory
Master module
Send buffer
Master station
1) 2)
3) 4)
[Reading data from the buffer memory in the intelligent device
station using the G(P).RIRD instruction]
1) The data in the buffer memory of an intelligent device station is
accessed.
2) The data read is stored in the receive buffer of the master station.
3) The data is stored in the device memory of the programmable controller
CPU and the devices specified with the G(P).RIRD instruction are
turned on.
G(P).RIRD
Receive buffer
1)
2)
3)
Intelligent device station
Programmable controller CPU
Buffer memory
Device memory
Master module
Master station