Byte no
Designation
Size
Value [hex]
01
Function code
1-byte
83 / 84
02
Error code
1-byte
01 - unknown function
02 - unknown data address
03 - unknown data value
04 - SunMaster inverter not respond or is faulty
03
CRC-Lo
1-Bajt
04
CRC-Hi
1-Bajt
8.3.1.3. READOUT OF SOLAR PANEL VOLTAGE VALUE Usol FROM INVERTER [4X / 3X-
REFERENCES]
The measurement value of solar panel voltage, readout from 16-bit register
Usol
MODBUS-RTU (see p.8.1.) is presented in the
format integer 16-bit with sign (in C/C++ type short int).
Query of solar panel voltage
Usol
from registry address 40003 / address 30003
11-03-00-02-00-01-CRCLo-CRCHi
11-04-00-02-00-01-CRCLo-CRCHi
Readout of solar panel voltage
Usol
from registry address 40003 / address 30003
11-03-02-00-F0-CRCLo-CRCHi
11-04-02-00-F0-CRCLo-CRCHi
In respond the solar panel voltage
Usol
is presented as 2-byte with values: 0x00F0.
The actual measurement value expressed in [V] DC is obtained from the read register according to the above algorithms, using the
appropriate factor value
DW
for register
Usol
(
see the
Table of divider values DW
above).
Usol
= 0x00F0 => 240/10 => 24,00 [V] DC
8.3.1.4. READOUT OF SOLAR PANEL CURRENT VALUE Isol FROM INVERTER [4X / 3X-
REFERENCES]
The measurement value of solar panel current, readout from 16-bit register
Isol
MODBUS-RTU (see p.8.1.) is presented in the format
integer 16-bit with sign (in C/C++ type short int).
Query of solar panel current
Isol
from registry address 40004 / address 30004
11-03-00-03-00-01-CRCLo-CRCHi
11-04-00-03-00-01-CRCLo-CRCHi
Readout of solar panel current
Isol
from registry address 40004 / address 30004
11-03-02-00-F0-CRCLo-CRCHi
11-04-02-00-F0-CRCLo-CRCHi
In respond the solar panel current
Isol
is presented as 2-byte with values: 0x00F0 .
The actual measurement value expressed in [A] DC is obtained from the read register according to the above algorithms, using the
appropriate factor value
DW
for register
Isol
(see the
Table of divider values DW
above).
Isol
= 0x00F0 => 240/100 => 2,40 [A] DC
8.3.1.5. READOUT OF FREQUENCY VALUE Fac ALTERNATING VOLTAGE NETWORK,
CONNECTED TO INVERTER [4X / 3X-REFERENCES]
The measurement value of frequency alternating voltage network to inverter, readout from 16-bit register
Fac
MODBUS-RTU (see
p.8.1.) is presented in the format integer 16-bit with sign (in C/C++ type short int).
Query of frequency network
Fac
from registry address 40005 / address 30005
11-03-00-04-00-01-CRCLo-CRCHi
11-04-00-04-00-01-CRCLo-CRCHi
Readout of frequency network Fac from registry address 40005 / address 30005
11-03-02-13-88-CRCLo-CRCHi
11-04-02-13-88-CRCLo-CRCHi
In respond the frequency network
Fac
is presented as 2-byte with values: 0x1388 .
The actual measurement value expressed in [Hz] is obtained from the read register according to the above algorithms, using the
appropriate factor value
DW
for register
Fac
(see the
Table of divider values DW
).
Fac
= 0x1388 => 5000/100 => 50,00 [Hz]
8.3.1.6. READOUT OF VOLTAGE VALUE Uac ALTERNATING VOLTAGE NETWORK,
16
ADA-4040PC3
