AirLink 9850 Gas Monitor Operator’s Manual
Appendix B: RS-485 Modbus Output • 41
Appendix B: RS-485 Modbus Output
Modbus Terms
Modbus: RTU
Setting: Baud Rate = 9600
Data Bits: 8
Parity: None
Stop Bits: 1
Time Out: 1000 ms
Device Address: 1-247
Data Type: Holding Registers
Start Address: The first register the user would like to view (must be between 1-255)
Length: Depends on the number of addresses the user would like to view
Scan Rate:1000 ms
Data Format: Hex, Decimal, Float
Register Map
The Modbus register map (applicable to RS-232, RS-485, and USB outputs) for the AirLink 9850 is
available at the link below.
