MEC 2 MICROPROCESSOR ENGINE/GENERATOR CONTROLLER
PM056 Rev 6 05/10/15 Thomson Technology
55
seconds will attempt cranking for 5 seconds after which time if no speed signal is
detected, the crank output will be removed for a preset 1 second delay before re-
engaging.
Note: This action is more than a cycle cranking function and is independent of
the number of attempts selected, therefore, the "crank" time should be
considered. To disable this feature, set to zero.
9.3.13.NUMBER OF CRANK CYCLES
Set to the number of cranking cycles required. (Zero will default to one.)
9.3.14.BYPASS DELAY
This setting is the time period that affected Alarm or Shutdown inputs will be
ignored after crank disconnect, allowing the engine to settle into its normal
operating mode (i.e. proper oil pressure, etc.). This is typically set to 10 seconds.
9.3.15.COOLDOWN TIME
Set to desired cooldown time in seconds. Up to 9999 seconds of cooldown time
may be programmed. Set to zero if not required. Note: If the controller is used
in an AMF application it is recommended to set the cooldown timer to a minimum
of 10 seconds to allow the generator to transfer Off Load before enabling the
cooldown time. (Ensures the load is transferred off of generator prior to stopping
the engine.)
9.3.16.NOMINAL ENGINE RPM
Set to the nominal engine speed in revolutions per minute (RPM).
9.3.17.FLYWHEEL TEETH
Set to the number of ring gear teeth on the engine flywheel. The magnetic pick-
up must be installed to sense the same teeth for speed sensing as programmed.
9.3.18.CRANK DISCONNECT SPEED
Set crank disconnect speed in percentage of nominal speed, i.e. 30% or 540
RPM on an 1800 RPM engine.
9.3.19.OVER SPEED
Set over speed shutdown point in percentage of nominal speed (i.e. 110% or
1980 RPM on an 1800 RPM engine).
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