Alpha Technologies ECM - Manual (Page 39)

39 TM 744-862-C0-003 Rev.C
Engine Control Module (ECM)
4.5 ECM System Parameters
The following is a listing of programmable parameters used by the ECM.
They may be changed via the Telecom Power Monitor (TPM). Refer to the
Telecom Power Monitor Technical Manual (p/n 744-781-B0) for additional
information.
4.5.1 Low DC Bus Level
Description: If the power system battery voltage goes below this
threshold voltage for a certain period of time, the
ECM will start the generator.
Range: 0V to 127VDC
Default setting: 1.95 volts/cell
4.5.2 High DC Bus Level
Description: If the power system battery voltage goes above this
threshold voltage for a certain period of time, the
ECM will shut down the generator.
Range: 0V to 127VDC
Default setting: 2.5 volts/cell
4.5.3 Service Interval
Description: Number of engine run hours between required
services.
Range: 0 to 65535 hours
Default setting: 100 hours
4.5.4 Service Countdown
Description: The number of engine run hours remaining until the
next periodic maintenance is required. This
parameter is reset to Service Interval when the
service timer reset button is depressed for at least
five seconds. Run time since last service is simply
Service Interval minus Service Countdown.
Range: 0 to 65535 hours
Default setting: N/A
4.5.5 Total Engine Runtime
Description: This counter keeps track of total in-service hours on
the generator set. It can be programmed to an
initial value that matches a mechanical hour-meter
that is often found on the generator’s prime mover or
it can be used in place of such a meter.
Range: 0 to 65535 hours
Default setting: N/A