Mitsubishi Electric MELSEC-Q Series User Manual page 186

(2) Functions
(a) Operation chart of the G(P).RIWT instruction
Master station
CPU module
Command
G(P).RIWT
Device
4.
1.
The data to be written to the target station is stored in the send buffer of the master station.
2.
The data specified by (S2) is written to the buffer memory specified by (S1) + 2 and (S1) + 3 of the
station specified by (S1) + 1, or written to the device in a CPU module.
3.
The target station sends the response of write completion to the master station.
4.
The device specified by (D) turns on.
(b) Simultaneous execution of the G(P).RIWT instruction
The G(P).RIWT instruction can be simultaneously executed to multiple local stations, a standby master station,
or intelligent device stations from a master station.
However, concurrent execution of the instruction is not allowed to the same station. In addition, concurrent
execution of the instruction is not allowed to the different stations from local stations. (including other dedicated
instructions)
If the dedicated instruction is executed before the completion of the former dedicated instruction, the latter
instruction is ignored.
Because several scans are required to complete the process of the dedicated instruction, create a program so
that the next dedicated instruction is executed after Completion device (D) turns on.
184
Master station
1.
Send buffer
Target station
Local station
2.
2.
Buffer memory
3.
3.
CPU module
Device