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APPX
Appendix 10 Operation Image and Data Structure of Predefined Protocol
For details on errors that occur when the communication completed abnormally, refer to the error code stored
in the buffer memory.
( Page 310 List of Error Codes)
For "Receive Only" communication type
When data is received from the external device, it is verified with the receive packet (expected packet). If it matches, the
receive processing ends. If the verification does not match, the received data is discarded.
The operation image of "Receive Only" is shown below.
■When the instruction completed successfully
Receive data 1
Receive data 2
DataHeader
Data
Data
Header
Receive packet
(expected packet)
Ethernet-equipped module
Not matched
Matched
Received
Sixteen receive packets
can be specified.
External device
Discarded
Ethernet-equipped module
External device
ECPRTCL instruction
Completion device
Receive data
Receive data
Completion device + 1
The receive data matched
the receive packet
(expected packet).
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