Mitsubishi Electric MELSEC iQ-F FX5 Programming Manual page 747

The following figure shows the timing of the receive processing with the SP.SOCRCV instruction.
Open completion signal
OFF
(SD10680.n)
Sequence program
ON ON
Receive state signal
OFF OFF
(SD10682.n)
SP.SOCRCV instruction
Completion device (d2)+0 OFF
Completion device (d2)+1 OFF
For details, refer to MELSEC iQ-F FX5 User's Manual (Ethernet Communication).
Operation error
Error code Description
(SD0/SD8067)
3405H The connection number specified by (s1) is other than 1 to 8.
2820H The size of the receive data exceeds the size of the receive data storage device.
The device number specified by (s2), (d1), or (d2) is outside the range of the number of device points.
2822H Device that cannot be specified is specified.
3582H When an instruction which cannot be used in interruption routine program is used.
Open
Send
processing
data
ON
END processing
ON
ON
Data
reception
(Only TCP)
Data reading
processing
END processing END processing END processing
Execute SP.SOCRCV instruction
1 scan
When failed
Data
reading
processing
ACK
10 BUILT-IN ETHERNET FUNCTION INSTRUCTIONS
10.2 Socket Communications Function Instructions
10
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