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III) Problems and solution:
Problem
Possible cause
Solution
The PCB don’t start
PCB not well fix on SLOT
Inverter is OFF
PCB broken
Control the PCB fixing on
SLOT ; verify if the
Inverter is OFF
If the problem still present
contact service.
The PCB don’t
communicate with the
inverter
(green led ON)
Initialization error, waiting for
communication condition
The system is waiting for
command reset. Reset the
PCB by stop and restart
the Inverter.
The PCB don’t
communicates with the
Modbus SW
Wrong connection RS485 line
Wrong setting
Verify the cable
connection.
Verify the RS485 terminal
resistor setting
Verify the dip-switch
setting
IV) TECHNICAL FEATURES
See the table below for the technical features of the board.
Feature
Specification
Part number
S0SER02MB
Insulated power supply SELV
12VDC
Description
Modbus Protocol conversion board for Solar
inverters
Modbus commands
suppurated
0x04 single or multiple reading
0x06 for the commands sending
Configurable baud rate
1200 / 2400 / 4800 / 9600 bps
Slave address
Node 1-31 (0 reserved), via dip switches
Serial connections
4 wires RS422 or 2 wires RS485
up to a maximum of 31 slaves on the same line
Compatibility
PV Inverter Series
Operating temperatures
-10°~60°C
Humidity
0-95% without condensing
Consumption
< 1W
Leds
Green Led: power supply ok and communication with
the inverter
Yellow Led : Modbus Communication
Standard
CE
Dimension LxWxH [mm]
132 x 60 x 10.5
