RN200 user manual 27
AUTO:
the start and stop of the inverters for the renewable sources, and the
management of the RNCB circuit breaker (if present) are the responsibility of the
controller (the operator cannot intervene). All protections are enabled. Access to
programming is allowed, but only some parameters can be changed.
REMOTE START
: this mode of operation is almost identical to the AUTO. It differs
only in the fact that the inverters are in any case started (automatically) even in the
presence of start inhibitions; the controller automatically closes the RNCB circuit
breaker (obviously if the system allows the connection of renewable sources). This
mode has priority over AUTO (once REMOTE START is activated, any requests for
automatic intervention are ignored). The operator does not have the right to manually
operate the RNCB circuit breaker. Access to programming is allowed, but only some
parameters can be changed.
The operating mode can be selected in three different ways:
Using the "
MODE UP
" and "
MODE DOWN
" buttons on the controller. The buttons
must be pressed consecutively for at least half a second to force the change of mode.
The buttons are disabled (a flashing key icon is shown on the first line of the display)
if at least one of the inputs described in the following point exists and is active.
Using one or more digital inputs properly configured.
By sending Modbus commands through the communication interfaces.
To activate the “
REMOTE START”
mode, instead, the controller must first be in AUTO. You
can switch to REMOTE START in these ways:
By configuring a digital input on the controller. If this input is active, the controller
switches to REMOTE START, when deactivated it returns to AUTO.
Through a suitable command via. In this case the controller switches to REMOTE
START as soon as it receives the SMS, and returns to AUTO when it receives the
opposite command.
Using parameters P.0426, P.0427 and P.0428 it is possible to define weekly time
bands in which the controller automatically switches to REMOTE START mode.
By sending Modbus commands through the communication interfaces. The controller
switches to REMOTE START as soon as it receives the command, returns to AUTO
when it receives the opposite one (remains in REMOTE START if the serial
connection is interrupted before receiving the opposite command).
7.3
The operator can act on the RNCB button to control the manual opening or closing of the
relative circuit breaker, but
only if
the controller is in the MAN operating mode. The button
acts as a closing command if the circuit breaker is open, as an opening command if it is closed.
As an alternative to the button, the controller also accepts to use:
Digital inputs: only one input can be used which, like the button, acts both as a closing
and an opening command; alternatively, two inputs can be used, one for the opening
command and one for the closing command.
Commands through the communication ports (two separate commands are provided
for closing and opening).
Note: in MAN RN200 it will never automatically close the switch; however, it can open it,
because its protections are also active in this operating mode.
