94 GC250 Technical Manual
EAAM057608EN
a) Steady out of tolerance: the generator voltages
and/or
frequency status must be
continuously
other
than
“In
tolerance”
for
two
seconds.
b) Steady within tolerance: generator's voltage
and
frequency global status must be
“within tolerance” for at least 0.5 seconds.
c)
Transient: shifting from status “a” to status “b” or vice versa.
9.3.4
Communication and events
The controller records any change of the generator's status in the events log, if it is enabled
with bit 2 of the P.0441 parameter:
EVT.1020: Lack of voltage on the generator.
EVT.1021
: Generator voltage present, but “out of tolerance”.
EVT.1022
: Generator voltage present and “within tolerance”.
The following feature for the configuration of the digital outputs related to the generator status
is also available:
DOF.3032 -
“Generator in thresholds”. The controller activates this output when the
generator voltages and frequency are within tolerance from the time configured.
In addition, the controller makes available the generator statuses for the AND/OR logics by
means of the following internal statuses:
ST.024 - "Generator voltage/frequency present"
ST.025 - "Generator out of tolerance or absent"
ST.026 - "Delay for generator within tolerance"
ST.027 - "Generator within tolerance"
ST.028 - "Delay for generator out of tolerance or absent"
9.4
In AUTO mode, whatever the kind of plant and the Mains status, two causes can anyway
inhibit the genset automatic start:
In predefined time intervals.
Digital input.
When there is an inhibition active, a flashing lock is displayed in the top right corner of the
display.
INFORMATION!
The inhibition status does not affect TEST and REMOTE
START modes.
9.4.1
Inhibition from contact
The controller can use a digital input programmed for inhibiting the genset automatic operation
(function 2501 -
genset operation inhibit). In case of an “active” input, the engine is never
automatically started, not even if the plants condition require.
Use parameter P.0207 to set a delay between input's physical activation and this function's
logic activation:
the delay can only be applied if the controller is in
AUTO
mode,
otherwise the delay is null.
Use parameter P.0208 to set a delay between input's physical de-activation and this function's
logic de-activation: in case the generator is already running, the delay is two seconds (firm).
