Operation Image Of Each Communication Type Of Protocol; For "Send Only" Communication Type; Appendix 10Operation Image And Data Structure Of Predefined Protocol - Mitsubishi Electric MELSEC iQ-RJ71EN71 User Manual

Appendix 10

Operation image of each communication type of protocol

With the predefined protocol support function, data is communicated with the external device using the "Send Only", "Receive
Only", and "Send & Receive" communication types.
This section describes the operation images of each communication type.

For "Send Only" communication type

The specified packet is sent once.
Ethernet-equipped
module
The operation image of "Send Only" is shown below.
■When the instruction completed successfully
ECPRTCL instruction
Completion device
Completion device + 1
Ethernet-equipped module
External device
■When the instruction completed with an error at TCP/IP (timeout error)
ECPRTCL instruction
Completion device
Completion device + 1
Ethernet-equipped module
External device
Operation Image and Data Structure of
Predefined Protocol
Send data
Data Header
Waiting time to send
Send packet
Send packet
Waiting time
t: TCP ULP timer
to send
Send packet
The packet cannot be sent or
no response is received from
the external device.
Appendix 10 Operation Image and Data Structure of Predefined Protocol
External device
An error has
occurred.
The device
turns on upon
abnormal end.
A
APPX
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