Panasonic FP2 ET-LAN Technical Manual page 129

Note:
The transmission request data size in the connection information setting area is specified in byte units,
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and should be set such that the transmission request data size is less than or equal to the transmission
buffer size x 2.
The next time data is to be sent, always check to make sure the transmission complete signal is off b
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before executing the transmission processing.
The user is notified of the content of an error by means of a transmission processing end code and an
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error log.
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