Campbell SR20-D2, Руководство по эксплуатации продукта

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4. RS-485 default configuration
The default RS-485 settings are: 19200 baud rate, 8 data bits, even parity, one stop bit. This
configuration is used for most Modbus networks.
5. SR20-D2 register map
Table 5-1 (p. 4) provides the register map for the most commonly used values. A comprehensive
register map is available in the Hukseflux manual.
Table 5-1: RS-485 register map
Starting
Register
Number
Register
Count
Data Format Units Description
1 1 Signed 16 bit integer Modbus address
3 2 Signed 32 bit integer mW/m
2
Irradiance (temperature
compensated signal)
5 2 Signed 32 bit integer mW/m
2
Irradiance (temperature
uncompensated signal)
7 1 Signed 16 bit integer 0.01 °C Sensor body temperature
8 1 Signed 16 bit integer x 0.1 Ω Sensor electrical resistance
9 1 Signed 16 bit integer Scaling factor irradiance
10 1 Signed 16 bit integer Scaling factor temperature
11 2 Signed 32 bit integer nV Sensor voltage output
41 1 Signed 16 bit integer Serial number
42 2 Float µV/W/m
2
Sensor sensitivity
47 2 Signed 32 bit integer Calibration date
99 1 Signed 16 bit integer x 0.01 % Humidity
SR20-D2 ISO Spectrally Flat Class A (Secondary Standard) Pyranometer 4