E2227
Rev 17.05.2021
Communication parameters
Parameter
Permitted values
Default
Supported baud rates 1200, 2400, 4800, 9600, 19200, 38400, 57600
9600
Data bits
8
8
Parity
none / odd / even
none
Stop bits
1, 2
1
Protocol
Modbus RTU
Modbus functions
03 - Read multiple registers
06 - Write a single register
Error codes
01 – Illegal function
02 – Illegal data address
03 – Illegal data value
04 – Slave device failure
(details of last error 04 can be read from register 0x0008)
Modbus holding registers
Registers Reg are shown in hexadecimal 0-based format.
Modbus holding register numbers MHR are shown in decimal 1-based format, and may be
addressed either from 00001 or 40001 base.
Reg
(hex)
MHR (dec)
RW Description
Supported values (dec)
Default
0x0004
(4)0005 RW Slave ID (net address) *
1...247 **
1
0x0005
(4)0006 RW Baud Rate *
1200, 2400, 4800, 9600, 19200,
38400, 57600
9600
0x0006
(4)0007 RW Response delay, ms
1...255
10
0x0007
(4)0008 RW Stop bits, parity bit *
1 no parity bit, 1 stop bit
(default after factory reset)
2 no parity bit, 2 stop bits
3 odd parity, 1 stop bit
4 even parity, 1 stop bit
NOTE: 3 and 4 are available
starting from the Software
version 0x214 (dec. 532)
1
10
