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• Completion of the BUFSND instruction can be checked with Completion device (D1)+0 and (D1)+1.
[Operation while the BUFSND instruction is being executed]
• The ZP.BUFSND instruction is executed on the rising edge (OFF ON) of the sending command.
Do not perform a send process using I/O signals and using the dedicated instruction together for the same connection.
Doing so will result in malfunction.
(5) Errors
If a dedicated instruction ends with an error, Completion device (D1)+1 turns on, and the error code is stored in
Completion status (S2)+1.
Item Description
Completion device (D1)+0:
Turns on at the END process of the scan where the BUFSND instruction is completed and
turns off at the next END process.
Completion device (D1)+1:
Turns on and off depending on the completion status of the BUFSND instruction.
• Normal completion: Stays off and does not change.
• Abnormal end: Turns on at the END process of the scan where the BUFSND instruction
is completed and turns off at the next END process.
Scan Scan
END
process
END
process
Scan
END
process
Executed
Abnormally ended
Program
Completion device
Sending data
BUFSND instruction
Completion device + 1
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