Index
Register address Variable
Unit /
value
Bytes
Format
Device
info
-
65533
Device type and con-
figuration
3701
2
unsigned
int
-
65534
Software version
XYYZZ
2
-
65535
Modbus version
10100
2
Write single registers and read holding registers
Some RS-485 port settings can be written to the registers of function 06 (write single registers) or
read from the registers of function 03 (read holding registers):
Register address
Variable
Range
Bytes
Format
Config
values
0
Modbus default
1
0 - 1…read
1…write
2
unsigned int
1
Modbus device
address
1 to 247
2
RS-485 baud rate
0…1200 baud
1…2400 baud
2…4800 baud
3…9600 baud
4…19200 baud
5…38400 baud
6…57600 baud
7…115200 baud
3
RS-485 parity/
stop bits
0…no parity, 1 stop bit
1…no parity, 2 stop bits
2…even parity, 1 stop bit
3…odd parity, 1 stop bit
Table 18:
Function 06 and Function 03 to read and write configuration values
1
Writing "1" sets the Modbus default settings.
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Manual
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