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8.5 CONDITIONS OF CRANK DISCONNECT SELECTION
No.
0
Frequency
1
Speed
2
Speed + Frequency
3
Oil pressure
4
Oil pressure + Frequency
5
Oil pressure + Speed
6
Oil pressure + Speed + Frequency
NOTES:
1) There are 3 conditions to make starter disconnected with engine, that is, speed, frequency and engine oil pressure.
They all can be used separately. We recommend that engine oil pressure should be used with speed and generator
frequency together, in order to make the starter motor separated with engine immediately and can check crank disconnect
exactly.
2) Speed sensor is the magnetic equipment which is installed in starter for detecting flywheel teeth.
3) When it is set as speed sensor, users must ensure that the number of flywheel teeth is the same as setting, otherwise,
―over speed stop‖ or ―under speed stop‖ may be caused.
4) If genset is without magnetic sensor, please don't select corresponding items, otherwise, ―start fail‖ or ―loss speed
signal‖ may be caused.
5) If genset is without oil pressure sensor, please don't select corresponding items.
6) If speed sensor is not selected in crank disconnect setting, the speed displayed on controller is calculated by
generating signals.
9
PARAMETERS SETTING
Please change the controller parameters when generator is in standby mode only (e. g. Start conditions selection,
configurable input, configurable output, various delay etc.), otherwise, alarming to stop and other abnormal conditions
may happen.
NOTE: Maximum set value must over minimum set value in case that the condition of too high as well as too low will
happen.
NOTE: When the warning alarm is set, please set the correct return value; otherwise, maybe there is abnormal alarm.
When the maximum value is set, the return value must be less than the set value; when the minimum value is set, the
return value must be over the set value.
NOTE: Please set the generator frequency value as low as possible when the genset is cranking, in order to make the
starter separated quickly as soon as crank disconnection happens.
NOTE: Configurable input could not be set as the same items; otherwise, there are abnormal functions. However, the
configurable output can be set as the same items.
HGM9420N_HGM9420LT Genset Controller
HGM9420N_HGM9420LT GENSET CONTROLLER USER MANUAL
Table 17 Crank Disconnect Conditions
Setting Description
2019-12-10
Version 1.0
Page 90 of 112
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