THOMSON MEC 20, Service Manual

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MEC 20 MICROPROCESSOR ENGINE/GENERATOR CONTROLLER
PM047 Rev 13 05/03/30 30 Thomson Technology
control functions. All programmable outputs may be user field programmed for the
desired control function. The following programmable features are provided:
ENERGIZE TO STOP GEN READY TO LOAD
AIR FLAP UTILITY READY TO LOAD
OIL BYPASS TIMER COMPLETE DIGITAL FAULTS #1 – #12
COMMON FAIL OVERSPEED
SWITCH NOT IN AUTO LOSS OF SPEED SIGNAL
ENGINE READY LOW BAT VOLTAGE
ENGINE RUN (FUEL) HIGH BAT VOLTAGE
PREHEAT WEAK BAT VOLTAGE
ENGINE RUNNING LOW OIL PRESS #1 ALARM
ATS TEST LOW OIL PRESS #2 SHUTDOWN
COMMON ALARM HIGH ENG TEMP #1 ALARM
COMMON SHUTDOWN HIGH ENG TEMP #2 SHUTDOWN
EPS SUPPLYING LOAD
5.2.1. ENERGIZE TO STOP
The designated programmable output relay will energize when a stop signal has
been activated. The output will remain energized for 10 seconds once the
engine has come to a complete stop, then de-energizes.
5.2.2. IDLE CONTROL
The designated programmable output relay will energize when an idle signal has
been issued to the engine controller. The output contact would typically be
connected to the “idle/run” input control of an electronic governor.
Note: The
controller receives an idle signal from a digital input contact that must additionally
be programmed for an idle function. During an idle condition, the engine
controller automatically bypasses all alarm or shutdown circuits except oil
pressure, digital fault input #1, digital fault input #2 and overspeed) which are
programmed for “bypass on start”.
5.2.3. PRE/POST/CYCLIC LUBE CONTROL
The designated programmable output relay will energize when a “lube” signal
has been initiated.
Note: The Lube function will be automatically terminated