Mitsubishi Electric QJ71E71-100 User Manual page 144

(2) No procedure
The following is the data send process performed in the fixed buffer number 1 area for the connection number 1.
Initial normal completion
signal X19
Open completion signal
(address: 5000
BUFSND instruction
BUFSND instruction
completion device
BUFSND instruction
completion device + 1
Confirm the normal completion of the initial process. (Initial normal completion signal (X19): ON)
1
Establish a connection between the E71 and the connected device and confirm the normal completion of the
2
open process of the connection number 1.
Execute the BUFSND instruction. (The data is sent.)
3
The send data in the fixed buffer number 1 is sent to the connected device by the send data length.
4
The E71 stops sending data. After the data send process abnormally ends, execute the BUFSND instruction
5
again to repeat the send process.
During UDP/IP communications, when the internal process of an E71 is normally completed, the data send process ends
even if the communication line between a CPU module and the connected device is not connected due to cable
disconnection or other causes. It is recommended to set an original communication procedure to send/receive data.
142
Initial process Open process
1
[b0])
H
Sending data
2
3
5
1 scan
ACK
(TCP only)
4