Mitsubishi Electric MELSEC iQ-F FX5, Programming Manual

Page: 749 / 1112

10 BUILT-IN ETHERNET FUNCTION INSTRUCTIONS
10.2 Socket Communications Function Instructions
747
10
■
Control data
*1 User: Data to be set before the execution of the instruction. System: The CPU module stores the execution result of the instruction.
When TCP is used, specify send data length that is smaller than the maximum window size of the target
device (Receive data buffer of TCP). Data whose size exceeds the maximum window size of the target device
cannot be sent.
Processing details
This instruction send the data set by (s3) to the target device of the connection specified by (s1).
The completion of the SP.SOCSND instruction can be checked using the completion devices (d)+0 and (d)+1.
• Completion device (d)+0: Turns ON during the END processing for the scan in which the SP.SOCSND instruction is
completed, and turns OFF during the next END processing.
• Completion device (d)+1: Turns ON or OFF depending on the status when the SP.SOCSND instruction is completed.
Device Item Description Setting range Set by
*1
(s2)+0 System area
  
(s2)+1 Completion status The status at the completion of the instruction is stored.
0000H: Completed successfully
Other than 0000H: Completed with an error (error code)
For error codes, refer to

MELSEC iQ-F FX5 User's Manual
(Ethernet Communication).

System
(s3)+0 Send data length Specifies the send data length. (Number of bytes) 1 to 2046 User
(s3)+1 to
(s3)+n Send data Specifies the send data.

User
Status Description
When completed normally The device does not change (remains OFF).
When completed with an error The device turns ON during the END processing for the scan in which the SP.SOCSND instruction is completed, and turns
OFF during the next END processing.
CPU module
Send data length
Send data
Send data
Send data
(s3)+0
(s3)+1
(s3)+2
(s3)+n
External device
SP.SOCSND
(Sending data)