Technical Operation; Engine Starting Sequence; Engine Stopping Sequence; Event System - FG Wilson PowerWizard 1.0 User Manual

PowerWizard 1.0 & 2.0 Control Systems User Manual
4.2

Technical Operation

4.2.1 Engine Starting Sequence

1. The PowerWizard receives an engine start signal. The signal will be one of four:
• The operator presses the Run key
• The control is in auto and the remote initiate digital input becomes active
• The control receives a start command via the RS-485 SCADA Data Link (PowerWizard 2.0 only)
• The control has a program cycle timer (PCT) configured that becomes active (PowerWizard 2.0 only).
2. The PowerWizard checks the system before beginning the cranking sequence. The PowerWizard checks that there
are no shutdown events present and that all previous shutdown events have been reset.
3. If the engine is equipped with a form of start aid such as thermostart it will enter a pre-start sequence.
4. The PowerWizard begins the crank sequence by activating the engine crank relay and the fuel control relay:
• If the engine reaches the setpoint for crank terminate speed the engine is deemed running and the engine crank
relay will be deactivated
• If the engine fails to start within a preset duration (normally seven seconds) the PowerWizard will stop cranking
and wait for a pre-set time (normally seven seconds) before attempting to start again
• If the PowerWizard fails to start within a pre-set number of crank attempts (normally three) the PowerWizard will
activate a "Fail to Start shutdown".

4.2.2 Engine Stopping Sequence

1. The PowerWizard receives an engine stop signal. The signal will be one of four:
• The operator presses the Stop key
• The control is in auto and the remote initiate digital input becomes inactive
• The control receives a stop command via the RS-485 SCADA Data Link (PowerWizard 2.0 only)
• The control has a program cycle timer (PCT) configured that becomes inactive (PowerWizard 2.0 only).
2. The PowerWizard begins the cool-down period. In order to bypass the cool down hold down the Stop key for three
seconds. The options "PRESS ENTER TO BYPASS" and "PRESS ESCAPE TO CONTINUE" will be shown on the
display. Press the Enter key to bypass the cool down sequence or press the Escape key to continue the cool down
sequence.
3. After the cool down cycle, the PowerWizard stops the engine by turning off the fuel control relay.

4.2.3 Event System

The PowerWizard module uses the J1939 standard format for events, whereby an event is defined as a combination of
a suspect parameter number (SPN) and a failure mode identifier (FMI). The SPN defines what is at fault and the FMI
defines how it is at fault (e.g. SPN = Oil Pressure, FMI = Low Shutdown would mean the set has shutdown on a low
oil pressure fault).
PowerWizard modules have separate event logs for events raised by the module itself and those raised by ancillaries
such as the engine ECM.
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