Mitsubishi Electric MELSEC iQ-R Series - Page 1563

16 ETHERNET INSTRUCTIONS
16.3 Fixed Buffer Communications Instructions
1561
16
Processing details
• This instruction sends the data in the device specified by (s3) to the external device of the connection specified by (s1) of
the module specified by (U). These instructions can be used only for the connections for which "fixed buffer communication
(with/without procedure)" is set as the communication means.
• The execution status and the completion status of the BUFSND instruction can be checked with the completion device (d)
and the completion status indication device (d)+1.
• The following figure shows the operation at completion of the BUFSND instruction.
• The BUFSND instruction is executed on the rising edge (OFF to ON) of the send command.
Operation error
No.: Connection No.
• Completion device (d)
This device turns on during END processing of the scan where the BUFSND instruction completes, and turns off during the next END processing.
• Completion status indication device (d)+1
This device turns on or off depending on the completion status of the BUFSND instruction.
When completed successfully: The device remains off.
When completed with an error: The device turns on during END processing of the scan where the BUFSND instruction completes, and turns off during the next
END processing.
Error code
((s2)+1)
Description
C000H to CFFFH  MELSEC iQ-R Ethernet User's Manual (Application)
(s3)
·
·
·
·
·
No.1
No.16
No.n
No.1
No.16
No.n
BUFRCV
BUFSND
CPU module
CPU module
[Own station] [Target station]
Ethernet moduleEthernet module
Send data length
Receive data
Fixed buffer data area
Fixed buffer data area
END0 END0END0END0
OFF
OFF
OFF
OFF
ON
ON
Sequence scan
BUFSND instruction
Completion device (d)
Completion status
indication device (d)+1
Completed with an error
Completed successfully
1 scan
Sending data
Execution of the instruction