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FG_F6_MODBUS_EN_01 / 2020-06-17
Frame construction
DIALOG MECHANISM (ASYNCHRONOUS LINK)
The Modbus RTU data frames do not include delimiters.
The synchronization is achieved by using a delay 3.5 times longer than the transmission time of a byte.
At the end of this delay, the first byte received is considered as the start of a new frame.