The opposite end of the daisy-chained bus must be connected to a suitable data logger with
appropriate RS485 protocol or an RS485-USB communication adapter such as the AURORA
PVI-USB-RS-485_232, to allow the bus to be interfaced to a computer or other (e.g., SCADA)
system.
Adaptors equivalent to the AURORA PVI-USB-RS-485_232 which may also be used for this
purpose can be found on the market; however, they have not been specically tested and ABB
cannot guarantee correct operation of the connection. These devices may also require external
termination impedance, whereas this is not necessary with the AURORA PVI-USB-RS-485_232.
Remote on/off a07
The connection and disconnection of the inverter to and from the grid can be controlled externally.
The function must be enabled in the menu on the inverter display (see Operations, section 4, of
this manual).
If the remote control function is disabled, the inverter automatically switches on and off in response
to applicable conditions. If the remote control function is enabled from the menu, the switching
on of the inverter also depends on the state of the R_ON/OFF terminal compared to the GND
terminal present on the connector a07 of the communication card 09.
When the R_ON/OFF signal is brought to the same potential as the GND signal (i.e. by making
a short circuit between the two terminals of the connector), the inverter disconnects from the
grid. This arrangement can be used to control the inverter from an external source via hardware
connection to the R_ON/OFF terminal. The system can also be used to facilitate a software
ON/OFF by placing a short across the R_ON/OFF terminal as noted above and then using the
ON/OFF function enable bit to control inverter operation. This signal would need to be obtained
by an external source using the RS485 port.
The remote control OFF condition is shown on the display. The connections of this control
are made between the R_ON/OFF input and GND. Since this is a digital input, there are no
requirements regarding wire size (it only needs room to pass cables through the cable openings
and the terminal connector).
POWER ALARM GFI ESC UP DOWN ENTER
POWER ALARM GFI ESC UP DOWN ENTER
POWER ALARM GFI ESC UP DOWN ENTER
TRIO
TRIO
TRIO
S4
PMU
PC
S2
OFF ON
OFF ON
a08
a09
TERM.
120
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