Mitsubishi Electric MELSEC-Q Series User Manual page 204

(2) Functions
(a) Operation chart of the G(P).RITO instruction
Master station
CPU module
Command
G(P).RITO
1.
Device
1.
The device after the device specified by (D) of the master station specified by Un is accessed.
2.
Data are written to the automatic update buffer specified by n1 and n2.
(b) Timing of writing data
The G(P).RITO instruction writes data while it is being executed.
But the concurrent execution of the instruction from two or more locations is not allowed for the same intelligent
device station.
(c) The number of allowable write points
The maximum number of points that can be written by the G(P).RITO instruction is 4096.
(d) Basic number of steps
The basic number of steps of the G(P).RITO instruction is nine.
(e) Assignment of the automatic update buffer
The assignment of the automatic update buffer is performed in "Station Information Setting" of the network
parameter of a programming tool. (
202
Master station
Automatic
update buffer
2.
Target station
Buffer memory
Communication
starts when
conditions are
met.
Page 102, Section 7.3.2 (2))
Intelligent device station
Automatic update
buffer memory