Magnetic pickup
fitted
= Magnetic pickup device is not fitted to the DSE module.
= A low impedance magnetic pickup device is fitted to the DSE module to measure
engine speed. Specifications of the DSE module Magnetic Pickup Input are contained
within DSE publication 057-163 8810 Operator Manual.
Flywheel teeth The number of teeth on the engine flywheel. This is read by the magnetic pickup device.
4.8.1.2 STARTUP OPTIONS
Enable Multiple
Engage
Attempts
= Only one engage attempt per start attempt is given. If no magnetic pickup pulses are
detected during cranking, the Loss of Sensing alarm is given.
= If no magnetic pickup pulses are detected during cranking, it is assumed that the
starter has not engaged to turn the engine. The starter is withdrawn and re-energised for
the configured number of Engage Attempts
Start Attempts The number of starting attempts the module will make.
If the module does not detect that the engine has fired before the end of the Cranking time,
then the current start attempt is cancelled and the Crank Rest time takes place before the
next crank attempt begins.
If, after all configured start attempts, the engine is not detected as running, the Fail to Start
shutdown alarm is generated.
The engine is detected as running by checking all methods of Crank Disconnect. For
further details, see the section entitled Crank Disconnect elsewhere in this document.
Loss of sensing
signal
If the speed sensing signal is lost during engine running (or not present during cranking
when Multiple Engage Attempts is enabled), an alarm is generated :
Shutdown: The generator is removed from load and the set is immediately stopped.
Warning: The generator continues to run, however a warning alarm is raised.
Magnetic
Pickup Open
Circuit
If the magnetic pickup device is not detected, an alarm is generated :
Shutdown: The generator is removed from load and the set is immediately stopped.
Warning: The generator continues to run, however a warning alarm is raised.
4.8.1.3 OVERSPEED OPTIONS
Overspeed
overshoot %
Overspeed
overshoot delay
To prevent spurious overspeed alarms at engine start up, the module includes configurable
overspeed overshoot protection.
This allows the engine speed to ‘overshoot’ the Overspeed / Over frequency setting during
the starting process for a short time.
Rather than ‘inhibiting’ the Overspeed / Over frequency alarms, the levels are temporarily
raised by the Overspeed Overshoot % for the duration of the Overspeed Overshoot delay.
4.8.1.4 DROOP
NOTE: Droop options are available only where supported by the Engine ECU over the CAN or
Modbus datalink. Contact engine manufacturer for further details.
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