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VSN800 Weather Station Product Manual
- 10 -
Start
End
#
Name
Type
Units
Scale
Factor
Constants
Description
SunSpec Irradiance Model Registers
0083 0083 1 C_SunSpec_DID
int16
N/A
0
302
Well-known value. Uniquely identifies
this as a SunSpec Irradiance Model
0084 0084 1 C_Sunspec_Length
int16
N/A
0
5
Variable length model block =(5*n),
where n=number of sensors blocks
0085 0085 1 E_Irradiance_Global
_Horizontal_1
uint16
W/m²
0
Measured
Global Horizontal Irradiance
0086 0086 1 E_Irradiance
_Plane-of-Array_1
uint16
W/m²
0
Measured
Plane-of-Array Irradiance
0087 0087 1 E_Irradiance_Diffuse_1 uint16
W/m²
0
N/A
Diffuse Irradiance
0088 0088 1 E_Irradiance_Direct_1
uint16
W/m²
0
N/A
Direct Irradiance
0089 0089 1 E_Irradiance_Other_1
uint16
W/m²
0
N/A
Some other type Irradiance
SunSpec Back of Module Temperature Registers
0090 0090 1 C_SunSpec_DID
int16
N/A
0
303
Well-known value. Uniquely identifies
this as a SunSpec Back of Module
Temperature Model
0091 0091 1 C_Sunspec_Length
int16
N/A
0
2
Variable length model block =(5*n),
where n=number of sensors blocks
0092 0092 1 E_BOM_Temp_1
int16
°C
-1
Measured
Back of module temperature
0093 0093 1 E_BOM_Temp_2
int16
°C
-1
Measured
Back of module temperature
End of Block Registers
0094 0094 1 EndOfSunspecBlock
uint16
N/A
N/A
0xFFFF
End of SunSpec Block
0095 0095 1 C_Sunspec_Length
uint16
N/A
0
0
Terminate length, zero
Device Address Write Register
0200 0200 1 Modbus Id - Write
Register
int16
N/A
N/A
60
Modbus device address, write register
Connect secondary sensors (VSN800-14 model only)
If you are not planning to connect the PV panel temperature sensor and the secondary
Pyranometer, skip this section.
1.
Attach the second Pyranometer to your array. The sensor should be attached so top
of the sensor is in the same plane as the PV panels. The sensor comes pre-attached
to a bracket for easy installation.
2.
Attach the PV panel temperature sensor so it registers the temperature on the
mounting considerations.
3.
Connect the sensor(s) to the proper location on the circuit board. Connect the
Pyranometer cable to terminals Pyranometer #2 and GND. Connect the PV Panel
temperature sensor cable to the two terminals labeled PV Temp #1.