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LF3000 User Manual
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5.6.2
RS485 Modbus communication protocol
The digital communication protocol is based on standard Modbus RTU Half-plex mode. A master
(PC or PLC) can communicate with multiple slaves (the current product) for data exchange and
communication parameter configuration.
5.6.2.1
Hardware connection
The hardware layer is TIA/EIA-485-A, as illustrated below. In this configuration, the product
(LF3000) is a slave.
5.6.2.2
Communication parameters
The PC UART communication parameters are listed in the following table.
Parameters
Protocol
RTU
Baud rate (Bits per second) 9600 bps
Start bits
1
Data bits
8
Stop bits
1
Even/Odd parity
None
Bits period
104.2 µsec
Bytes period
1.1458 msec
Maximum data length
20
Maximum nodes
247
