31
EN
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Connection of RS-485 serial communication line
Please note that automatic settings of network parameters at turning
on, embedded logging capability, automatic logger-free transferring
of data to Aurora Vision Cloud and remote firmware update are pro-
vided over TCP/IP (Ethernet and/or Wi-fi) bus only.
The use of the inverters over the RS485 line is recommended in case of
monitoring and controlling by using third party RS485 control sys-
tems.
Slave mode
By default the RS485 port is set as Slave mode. In case the port was set as “Master mode” it must configured through the inte-
grated Web User Interface (refer to chapter “Web User Interface”) to use the RS485 as a serial communication line.
The RS-485 port can be used to set up a line of communication which, when connected to a monitoring device, enables the opera-
tion of the photovoltaic system to be kept under control. Depending on the device used monitoring can be local or remote.
RTN
SHIELD
TO MONITORING
SYSTEM
485+
485-
RS485 line supports Modbus/RTU SUNSPEC compliant Modbus protocol.
The RS-485 serial communication line is available on the communication and control board
(28)
with two terminal blocks
(39)
for
each serial line signal (+T/R, -T/R and RTN) so as to be able to make a daisy-chain connection (“in-out”) of multiple inverters.
• Connection of the R485 communication line conductors is made using the terminal block connectors
(39)
(485+, 485-, RTN and
SHIELD).
• When connecting a single inverter to the monitoring system, activate the communication line resistance terminal by setting the
switch
(36)
(to the ON position). In case of multiple installation set the switch only on the last inverter of the chain.
For further information regarding the configuration and use of the RS-485 serial communication line, please refer
to the user manual.
Master mode
The RS485 portcan either be used for connecting supported accessories (like weather station): in this case data from accessories
will be logged and transferred to the cloud by inverter itself (master mode).
This will allow the inverter to serve as a logger for ABB accessories.
For more information on connecting the accessories to the RS485 terminal block, refer to the accessory product manual or con-
tact ABB customer support.
The RS-485 serial communication line is available on the communication and control board
(28)
with two terminal blocks
(39)
for
each serial line signal (+T/R, -T/R and RTN) so as to be able to make a daisy-chain connection (“in-out”) of multiple inverters.
• Connection of the R485 communication line conductors is made using the terminal block connectors
(39)
(485+, 485-, RTN and
SHIELD).
• Set the switch of the termination resistance
(36)
to“ON” position.
• When an accessory is connected it must be added and configured into the “Monitored device” list on the integrated Web User
Interface.
For further information regarding the configuration and use of the RS-485 serial communication line, please refer
to the user manual.
J10
J9
X1
J6
J1
J4
S2
S1
S3
J7
J8
J20
X2
J2
J3
1
1
8
2
3
4
1
4
1
8
7
8
2
1
39
36
485+
RTN
485-
485+
RTN
SHIELD
SHIELD
485-