Michell Instruments Hygrosmart HS3, Руководство пользователя

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HygroSmart HS3 User’s Manual
28 97516 Issue 5, July 2017
APPENDIX B
Appendix B HS3 Modbus Communications and Register Map
B.1 Communications
2 1
3 4
5
Modbus Cable Color
1 Comms A Brown
2 Comms B White
3 0 V Blue
4 +5 V to +28 V Black
5 0 V Gray
Figure 31
Pinout
Parameter Value
Baud Rate 9600 bps
Stop Bits 1
Data Bits 8
Parity Check None
Flow Control None
Figure 32 Serial Port Parameters
The HS3 uses the Modbus RTU protocol to communicate.
All data is accessed by using Function Code 3 - Read Holding Registers, the byte order of the data
in the responses is Big Endian (AB).