Fischer Panda 15 mini PMS Digital, Руководство пользователя

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Generator control system
Based on VCS183
DS_VCS183 Page 11
Rev. 06 www.fischerpanda.com ©Fischer Panda generators Inc.
Regular engine start detected
If regular engine start was detected (frequency above threshold) then the control system will transition
into operational mode “idling”. From this point on for a certain time the oil pressure will not be
monitored for shutdown threshold (P40, P46) and for a (different) time period the same is true for
parameters temperatures as under P35, P37-P39, P41, and P43-P46. Throughout entire idling mode AC
voltage and AC frequency will not be monitored against low limits (P12, P13,P16). At any time, the
exhaust temperature sensor will be monitored for absolute maximum value (P69) to comply with ABYC
standards.
While in operational mode “idling” the control system will regulate
the engine based on speed, target is
idle speed (P00). If the fuel rack is misadjusted the controller may not be able to bring the engine to this
speed as it will never try to position the fuel rack outside the initially calibrated limits (
Warning and
alarm messages )
Generator idling
Idling period will end at any time if the control system detects AC voltage to be within 15% of nominal
AC voltage (P02). In such case the operational mode is transferred to “warming up”. It will also end after
the total idling period has elapsed (P09). The controller will now advance the fuel rack to bring engine
speed to nominal speed (P01) and will now expect the voltage to increase above 85% of nominal AC
voltage (P02). Once this has occurred the operational mode will transition to “warming up”
. Engine
speed is from now on and throughout all subsequent operational modes (until manual or automatic
shutdown) no longer controlled by actual speed but based on actual AC voltage.
Warming up
While in this operational mode the control system will check for time-out for monitoring oil pressure for
shutdown threshold (P40, P46) and for time-out for monitoring temperatures as under P35, P37-P39,
P41, and P43-P46. Once the respective timer times out the according monitoring will be enabled. After
both timers time out operational status transfers to
“running”
Running the generator
As described above the system cycles through several modes of operation, total time for such sequence
though is usually just a couple of seconds and basically depends on parameter P08, idling time. Once the
generator is in running mode, load may be applied and it will perform speed regulation and monitoring
using all enabled sensors. If the control system detects a situation that requires any of the CAxx or STxx
messages to be activated an emergency generator stop will be initiated. In such case the actual
operating data will be logged to int the alarm data log memory and then the stop sequence begins. For
data logging details see
Table 2: Log data set . Emergency stop follows the same pattern as a regular
stop, the only difference being the final status and data logging. After a regular stop the operational
mode will transition to “stop mode”
and no data logging occurs, while it will transition to operational
mode “unacknowledged alarms pending” in cas
e of an emergency shutdown and will log shutdown
data.
Most of the analog inputs that are monitored against some programmable thresholds also have a delay
time associated. If no delay time is programmable then the control system uses a predefined delay time
of either 0.2sec or 0.5sec, as appropriate for that input. In order for a certain warning or shutdown to be
triggered the control system needs to read that input in critical status continuously for the programmed
delay time. This is to avoid random shutdowns based on spurious fluctuations.