SW1-1
SW1-2
OFF
OFF
In the RUN mode the yellow LED (located near the SW1), will turn off.
7. OPERATION
ADA-4040PC3 is bidirectional protocol converter of SunMaster to MODBUS-RTU protocol,
with
possibility of conversion a baud
rate, a data format (number of data bits, parity bit, stop bits) and interface type RS485 to RS422.
Additionally, is a separator of
SunMaster port from MODBUS-RTU port.
ADA-4040PC3 reads data from SunMaster inverter and than properly processed write to registers of MODBUS-RTU protocol
(described in pt.
IMPLEMENTATION OF MODBUS-RTU PROTOCOL
).
Frames of MODBUS protocol having the errors CRC are rejected by the converter.
Frames of SunMaster having the errors CRC are also rejected by the converter.
In case of no respond from SunMaster inverter ADA-4040PC3 converter responds exception MODBUS protocol (described in pt.
EXCEPTIONS OF MODBUS-RTU PROTOCOL
)
Fig 10. Connection of SunMaster inverters to RS485 MODBUS-RTU bus.
8. IMPLEMENTATION OF MODBUS-RTU PROTOCOL
ADA-4040PC3 protocol converter allows connecting Inverters with SunMaster-Soladin protocol as SLAVE to RS485 MODBUS-RTU
bus. The length of RS485 bus can be extended by the use of ADA-4040 repeaters or ADA-4044H HUBs RS485
The MODBUS-RTU protocol used for communication between ADA-4040PC3 converters and SCADA-type system or PLC controller
enable easy integration of SunMaster-Soladin inverters in existing automation systems BMS.
8.1. TABLE OF MODBUS-RTU ADDRESSES
8.1.1. REGISTERS ACTUAL VALUE MEASUREMENTS AND CONDITION INVERTER, READOUT
BY FUNCTION 04 (3X – REFERENCES) INPUT REGISTERS
Address
3X
Registers
Address
Registers
description
Attribute
Value
30001
0
TypeIDH = 0x00
TypeIDL 8-bit inverter type
R
16-bit register
30002
1
Status1
Status0 16-bit inverter status
R
16-bit register
30003
2
UsolH
UsolL 16-bit
solar panel voltage DC measurement
R
16-bit register
11
ADA-4040PC3
SCADA
MASTER
MODBUS-RTU
SLAVE
MODBUS-RTU
DEVICE
ADA-1040
RS-48
5 2-wi
re or 4
-wire B
US
Trans
missio
n 1920
0 bps
/ 8 / N
/ 1
MODB
US-RT
U
ADA-4040PC3
SLAVE
MODBUS-RTU
DEVICE
ADA-4040PC3
RS-232
T
ra
n
s
m
is
s
io
n
9
6
0
0
b
p
s
/
8
/
N
/
1
Inwerter
Sunmaster CS
T
ra
n
s
m
is
s
io
n
9
6
0
0
b
p
s
/
8
/
N
/
1
Inwerter
Sunmaster XS
