Generator control system
Based on VCS183
DS_VCS183
Page 18
Rev. 06
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Maintaining cumulative data and service history
Cumulative data (total operating time, total electric energy produced, total number of generator starts)
and service history are not tied to the control system but to the generator. To ensure data is always
maintained correct it will be double-buffered in the control panel and in the control system VCS183. If
replacing either one, with proper factory programing of the replacement component it is ensured that
cumulative data as well as service history is transferred from the non-replaced part to the replaced one.
Warning and alarm messages
Some of the data monitored by the control system have a warning level and a shutdown level
associated. In such case the control panel will report a warning as soon as the corresponding reading
exceeds the warning threshold. If this reading does later on exceed the shutdown level as well then, the
control panel will only show that message as an alarm (major fault, light text on dark background)
although the warning condition for that signal is true as well. See below table for this kind of messages:
Table 4: Messages appearing as alarms or warnings
Coding
Meaning
Remark
CW00, CA00
AC voltage is above threshold
CW01, CA01
AC voltage is below threshold
CW02, CA02
AC current is above threshold
CW03, CA03
AC power is above threshold
CW04, CA04
DC voltage is above threshold
CW05, CA05
Coolant in temperature is above threshold
Will not be set if sensor is missing, shorted or disabled
CW07, CA07
Cylinder head temperature is above threshold
Will not be set if sensor is missing, shorted or disabled
CW08, CA08
Exhaust elbow temperature is above threshold
Will not be set if sensor is missing, shorted or disabled
CW09, CA09
Winding temperature is above threshold
Will not be set if sensor is missing, shorted or disabled
CW10, CA10
Oil pressure is below threshold
Will not be set if sensor is missing, shorted or disabled
CW11, CA11
Alternator bearing temperature is above threshold
Will not be set if sensor is missing, shorted or disabled
Missing current sensing device equals missing sensor
CW12, CA12
Internal 5V supply voltage is below threshold
CW13, CA13
Actuator current is above threshold
CW14, CA14
Engine speed is above threshold
CW15, CA15
Internal 5V supply voltage is above threshold
Different aspects apply to AC current limits and AC power limits. As can be seen in
a certain time delay may be associated to either one of these thresholds. While it is obvious
that exceeding alarm levels for the specified delay time will cause an emergency shut-down, things are
different with warning levels: Either one of these warnings will become an alarm level if it was pending
for the specified warning delay. For this reason warning delays (P17 and P19 in
) for current and power output are in the order of tens of minutes, to ensure the generator
will provide peak power as specified, but will be protected against overload if peak power is drained for
prolonged time.
Remaining messages are either informative, warnings or alarms. Informative messages may be
disregarded from a safety aspect, warning messages are supposed to make the user aware of unusual
operating condition that may require his attention or service in the near future and may be regarded as
minor faults. Alarm messages will always cause an emergency shutdown or prevent engine start and
may be regarded as major faults. Some alarms are suppressed while the engine is not running in order
to avoid a lockup situation and to allow start in extreme situations. Low oil pressure alarms and low
output voltage alarms obviously will not be active while the generator is not running. Some
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