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Modbus registers
NOTICE
The map register offset in this Appendix is Base 0 (first register address is at 0).
Holding registers
The Holding registers consist of 16 bits. They can be read and written. The address (1 byte) is sent
before each command. A CRC (2 bytes) is sent after each command.
Register name Register
address
Data type Value range Default
value
Description
Address 200 1 – 247 247 Also known as Slave ID
Baud rate 201 1 = 1200
2 = 2400
3 = 4800
4 = 9600
5 = 19200
4 = 9600 This is the baudrate used during Modbus
communication
Parity 202
1 = Even
2 = Odd
0 This is the parity bit in the Modbus frame
Stop bit 203 1 = One stop bit
2 = Two stop bits
1 This is the number of stop bits in the
Modbus frame
Map Register
Offset
204 0 = 0
1 = 1
1 This offset is added from the address
received in the Modbus frame message.
Defines the register base number
Delay Time 206 1 – 200ms 50 ms Define the period of time before the LWT
sends out a response
Swap Mode 3000 0 = ABCD,
1 = CDAB,
2 = DCBA,
3 = BADC
1 = CDAB Define the byte order for the Floating
Point Format Code register
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