Hukseflux SR05 series - 6.4 Standard Hukseflux Modbus Output

SR05-D1A3-PV manual v1801 48/83
6.4 Standard Hukseflux Modbus Output
In addition to the IMT-Solar Si-RS485TC-T-MB silicon reference cell compatible Modbus
output, SR05-D1A3-PV supports the standard Hukseflux Modbus output, but with an
offset of 0x1000 in the register address as compared to SR05-D1A3:
SR05-D1A3-PV register address = SR05-D1A3 register address + 0x1000
Table 6.4.1 Modbus registers 0x1000 to 0x100B. For basic operation, Hukseflux
recommends to read out registers 0x1002 + 0x1003 for solar radiation, register 0x1006
for instrument body temperature and register 0x1028 for the sensor serial number.
MODBUS REGISTERS 0x1000-0x100B
REGISTER
ADDRESS
(HEX)
PARAMETER DESCRIPTION OF CONTENT TYPE
OF
(R/W)
FORMAT
OF DATA
0x1000
Modbus address
Sensor address in Modbus
network, default = 1
R/W
U16
0x1001 Serial communication
settings
Sets the serial
communication, default = 5
R/W U16
0x1002 +
0x1003
Irradiance signal in x 0.01
W/m² R S32
0x1004 +
0x1005
Factory use only
0x1006 Sensor body
temperature
In x 0.01
°
C R S16
0x1007
Sensor electrical
resistance
In x 0.1 Ω
R
U16
0x1008 Scaling factor
irradiance
Default = 100 R U16
0x1009
Scaling factor
temperature
Default = 100
R
U16
0x100A +
0x100B
Sensor voltage output In x 10
-9
V R S32
0x100C to
0X101F
Factory use only
Register 0x1000, Modbus address, contains the Modbus address of the sensor. This
allows the Modbus master to detect the slave, SR05-D1A3-PV, in its network. The
address can be changed; the value of the address must be between 1 and 247. The
default Modbus address is 1.
Note: The sensor needs to be restarted before changes become effective.
Register 0x1001, Serial communication settings, is used to enter the settings for baud
rate and the framing of the serial data transfer. Default setting is setting number 5:
19200 baud, 8 data bits, even parity and 1 stop bit. Setting options are shown in the
table below.
Note: The sensor needs to be restarted before changes become effective.