Modbus; Configuration Of Parameters; Functions; Data Format - sauermann Si-C320 User Manual

12.1 Configuration of parameters

• Communication speed: between 2400 and 115200 bauds, 9600 bauds by default
• Data bits: 8 bits
• Stop bit: 1 bit
• Parity: None
• Flow control: None
• Transmitter addressing: between 1 and 255 (automatically answers the requests from address 0)
• Data sending: made by words of 2 bytes, in the following order most-significant then least-significant byte

12.2 Functions

• Register function: Function 03
• Register writing: Function 16
• Communication loop test: Function 08

12.3 Data format

UNIT8
Value (0x01)
Registers
UNIT16
Value (0x0102)
Registers
UNIT32
Value (0x01020304)
Registers
FLOAT32
Value (0x01020304)
Registers

12.4 Description of function and Modbus connections

12.4.1 Device

Modbus

1000 STR
1010 STR
1020 STR
1030 STR
1040 STR
1050 STR
1060 STR
1070 STR
1080 STR
28
Byte3
0x01
Reg0
0x03
Byte3
0x01
Reg0
0x03
Register type
Serial number of the transmitter
Firmware version
Device identification
Probe 1 identification
Probe 2 identification
Module identification
Probe 1 serial number
Probe 2 serial number
Module serial number
Byte 1
0x00
Reg0
0x00
Byte 1
0x01
Reg0
0x01
Byte2
0x02
0x04
Byte2
0x02
0x04
Description
12. Modbus
Byte 0 (lsb)
0x01
0x01
Byte 0 (lsb)
0x02
0x02
Byte1 Byte0 (lsb)
0x03 0x04
Reg1
0x01 0x02
Byte1 Byte0 (lsb)
0x03 0x04
Reg1
0x01 0x02
Possibilities
Modbus