Modbus RTU(Offset)
Estimated reading time: 1 minute
Refer to these sections for details:
Supported Series
Modbus RTU (Offset)
Website: http://www.modbus.org/
PLC Connection Settings
Parameters | Recommended | Options |
---|---|---|
PLC Type | Modbus RTU (Offset) | |
PLC Interface | RS485 | RS232/RS485 |
Baud Rate | 9600 | 9600 ~ 115200 |
Data Bits | 8 | 7, 8 |
Parity | Even | Even, Odd, None |
Stop Bits | 1 | 1, 2 |
PLC Station # | 1 |
0 ~ 255 |
PLC Configuration
The steps shown here are for the Modbus RTU(Offset) PLC.
Broadcast Command: Yes
Extend Address Mode: Yes
Communication Mode: Modbus RTU protocol
OT Link Platform DeviceHub Configuration
To configure DeviceHub for this Modbus RTU (Offset) PLC:
-
DeviceHub > Add Device
Type: Modbus
Driver: Modbus RTU(Offset) -
Enter details specific to your environment and click Add Device.
Device Addresses
Data Type |
Device Type |
Format |
Range |
Description |
---|---|---|---|---|
Bit | D | DDDD | 1 ~ 9999 | Discrete Input Contacts |
Bit | C | DDDD | 1 ~ 9999 | Discrete Output Coils |
Bit | H_Bit | DDDDdd | 1 ~ 999915 | Analog Output Holding Registers |
Bit | I_Bit | DDDDdd | 1 ~ 999915 | Analog Input Holding Registers |
Int | H | DDDD | 1 ~ 9999 | Analog Output Holding Registers |
Int | I | DDDD | 1 ~ 9999 | Analog Input Registers |
Float | H_Float | DDDD | 1 ~ 9998 | Analog Output Holding Registers |
Float | I_Float | DDDD | 1 ~ 9998 | Analog Input Registers |