Procedure For Writing From External Device - Mitsubishi Electric MELSEC iQ-RJ71EN71 User Manual

Procedure for writing from external device

The following shows the procedure when writing data from the external device to the random access buffer of the RJ71EN71
or the RnENCPU (network part).
1.
After the module parameters are set, check that the initial processing of the RJ71EN71 or the RnENCPU (network part)
has completed normally. ('Initial status' (Un\G1900024.0): On)
2.
The open processing is executed to establish a connection between the RJ71EN71 or the RnENCPU (network part) and
external device. ( Page 378 TCP/IP Communications, UDP/IP Communications)
3.
Data is written from the external device to the random access buffer of the RJ71EN71 or the RnENCPU (network part).
(RJ71EN71 or RnENCPU (network part) side: Receives command)
4.
The RJ71EN71 or the RnENCPU (network part) execute the write processing requested by the external device, and
returns the write results to the external device that sent the write request. (RJ71EN71 or RnENCPU (network part) side:
Sends response )
5.
The data written in the random access buffer is read asynchronously from the above the processing by the program.
6.
Close the connection when communication is finished.
1 FUNCTIONS
96
1.6 Communications Using the Random Access Buffer