SMC Networks PF3A801H-L Operation Manual page 76

•The process data of this product is Big-Endian type.
When the transmission method of the upper communication is Little-Endian, the byte order will be
changed.
Refer to the table below for the Endian type of the major upper communication.
Endian type
Big-Endian type
Little-Endian type
Upper communication protocol
Such as PROFIBUS and PROFINET
Such as EtherNET/IP, EtherCAT and CC-Link IE Field.
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