Sices HS 315, Техническое руководство

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Technical Handbook 129
If the voltage is in the “B”, “D” or “F” bands, previous status is maintained (hysteresis). For
example, if the voltage was in the “E” band and now it is in “D” band, it is considered however
“In tolerance”. On the contrary, if voltage was in the “C” band and now is in “D” band, it is
considered “Low”.
To
diagnose the generator “global” status, the following algorithms are used, shown in their
computing order:
•
In case the status of all existing voltages (AC and/or DC) and the frequency/speed (if
available) are “Absent”, also the global status is “Absent”.
•
In case the status of all existing voltages (AC and/or DC) and the frequency/speed (if
available) is “In tolerance”, also the global status is “In tolerance”.
•
In case the status of at least one voltage (AC or DC) or the frequency/speed (if
available) is “High”, also the global status is “High”.
•
In case none of the previous conditions occurs, global status is “Low”.
For general management purposes, generator operation can be described in three steps:
a) Steady out of tolerance: the voltages status (AC/DC) and/or the frequency/speed
status (if available) must be continuously other than “In tolerance” for two seconds.
Th
e “GENERATOR LIVE” lamp is off if voltages and frequency are in “Absent” status,
otherwise it blinks (it blinks also if the engine is running).
b) Steady within tolerance: the voltages status (AC/DC) and the frequency/speed status
must be “within tolerance” for at least half a second. The “GENERATOR LIVE” lamp
is steady on.
c) Transient: shifting
from status “a” to status “b” or vice versa. The “GENERATOR LIVE”
lamp blinks.
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: generator voltages are missing.
•
EVT.1021: generator voltages are present (out of thresholds).
•
EVT.1022: generator voltages are present (in thresholds).
The following feature is also available for the configuration of the digital outputs, related to the
generator status:
•
DOF.3032 -
“Generator in tolerance”. The controller activates this output when the
generator voltages (AC/DC) and frequency/speed (if available) are within tolerance
from the time configured.
•
DOF.4031: the controller activates this output to signal the presence of at least one
anomaly related to the generator:
o
008 - Operating conditions not reached.
o
003 - Minimum generator's frequency.
o
058 - Low generator's frequency.
o
060 - High generator's frequency.
o
004 - Maximum generator's frequency.