Mitsubishi Electric L26CPU-BT User Manual page 218

(1) Functions
(a) Operation chart for the G(P).RIFR instruction
Master station
Programmable controller CPU
Command
G(P).RIFR
Device memory
1) Accesses the automatic update buffer specified by n1 and n2 of the master module specified by Un.
2) Stores the data read after the device specified by (D).
(b) The G(P).RIFR instruction reads data when it is executed.
However, this instruction cannot be executed simultaneously at more than one location for the same intelligent
device station.
(c) The maximum points that can be read by the G(P).RIFR instruction are 4096.
(d) The basic number of steps of the G(P).RIFR instruction is 9 steps.
(e) Use GX Works2 to assign automatic update buffer in "Station Information Setting" in
the "Network Parameter" window.
For more details on the setting, refer to
216
Master module
1)
Automatic
update buffer
2)
Specified station
Communication
Buffer memory
commences
when
conditions
are met
Page 83, Section 7.3.2 (2).
Intelligent device station
Automatic update
buffer memory