Appendix 5 Operation Image And Data Structure Of Predefined Protocol; Operation Image Of Each Communication Type Of Protocol - Mitsubishi Electric MELSEC iQ-R Series User Manual

Appendix 5

Operation image of each communication type of protocol

In the predefined protocol function, communication with target devices is performed through the communication type "Send
only", "Receive only", or "Send & receive". This section explains the respective operation images.
When communication type is "Send Only"
The specified packet is transmitted once.
C24
Terminator
The operation image of "Send only" is as follows.
■Normal completion
CPU
Execute dedicated instruction
module
(G(P).CPRTCL)
Completion device
Status display device
at completion
C24
Target device
■Error completion (transmission monitoring timeout error)
Example of setting
Standby time: 0, Number of send retries: 0, Monitoring time: other than 0
CPU
Execute dedicated instruction
module
(G(P).CPRTCL)
Completion device
Status display device
at completion
C24
Target device
Operation Image and Data Structure of
Predefined Protocol
Transmitted data
Data Command Station No. Header
Send packet
Send packet
t: Transmission waiting time
Cannot send a packet

Appendix 5 Operation Image and Data Structure of Predefined Protocol

Target
device
OFF at normal completion
Error occurred
ON at error completion
APPENDICES APPENDIX
521
A