Modbus Communication Settings - Deif SGC 120 User Manual

10. Modbus communication settings

10.1 Modbus communication settings
RS-485 communication settings
• Slave ID: 1 to 247
• Baud rate: 1200/2400/4800/9600/19200/38400/57600/115200 bps
• Parity: None/Even/Odd
• Stop bit: 1, 2
• Recommended polling frequency: 50 Hz
• No response timeout: 250 ms
Command from Modbus master for Function 16
Byte Field
0 Slave address
1 Function code (0x10)
2 First register address - high byte
3 First register address - low byte
4 Number of registers to write - high byte
5 Number of registers to write - low byte
6 Number of data bytes to follow (n)
7 Value at first register
... ...
6+n Value at last register
7+n/8+n Error check CRC
Normal response from SGC 120/121 slave for Function 16
Byte Field
0 Slave address
1 Function code (0x10)
2 First register address - high byte
3 First register address - low byte
4 Number of registers written - high byte
5 Number of registers written - low byte
6/7 Error check CRC
Command from Modbus master for Function 3
Byte Field
0 Slave address
1 Function code (0x3)
2 First register address - high byte
3 First register address - low byte
USER MANUAL 4189341226A UK
Remarks
As configured in the controller.
16-bit register address, register address map is
described in the Register map.
Number of registers to write must be between 1 to 255
Remarks
As configured in the controller.
16-bit register address, register address map is
described in the Register map.
Number of registers that have been written.
Remarks
As configured in the controller.
16-bit register address, register address map is
described in the Register map.
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