Himoinsa CEM7 User Manual

OPERATION | PAGE 13
4.2 ENGINE STOP
The engine stopping process in automatic mode is carried out as follows:
1. Cooling the engine. Once free of charging, the engine will continue running for
a cooling time (Times table, parameter 11). In certain situations, it is possible to
set the alarms (Alarms table, parameters 3, 6, 9...) of the control unit to perform
a stop without engine cooling.
2. Engine stop. After the engine cooling time has elapsed, the PC output of the
measurements module is enabled or disabled according to the programmed
conguration (Regulations table, parameter 18). As an engine stop condition it is
possible to select:
• Generator voltage (Regulations table, parameter 19). The engine is
considered stopped when the generator voltage is below the start up
threshold (Threshold table, parameter 20).
• Alternator voltage (Regulations table, parameter 20). The engine is
considered stopped when the battery charging alternator voltage is
below the start up threshold (Threshold table, parameter 21).
• Engine speed (Regulations table, parameter 21). The engine is
considered stopped when the engine speed calculated by pickup or
obtained from the engine electronics by the J1939 bus is below the start
up threshold (Threshold table, parameter 22). To activate the pickup
calculation via the engine ring gear, it is necessary to enter the number
of teeth on the engine's ywheel ring gear (Threshold table, parameter
24). If the number of teeth for the ywheel ring gear is zero, the pickup
frequency is calculated via the generator frequency according to the
ratio 50Hz/1500rpm, 50Hz/3000rpm or 60Hz/1800rpm (Regulations
table, parameter 26).
• Low Oil Pressure Signal (Regulations table, parameter 22). The low oil
pressure condition is used for detecting a stop, by which the engine
is considered stopped when it is detected that the sensor is closed.
Exceptions to this engine stopped detection are those engines on
which sensors with their own power supply are mounted.
To conrm the engine has stopped, all the programmed stop conditions must be
detected for a set period of time (Alarms table, parameter 71). If following a
congurable time (Times table, parameter 36, default value: 90 seconds) any
engine running condition is still detected, the Stop Failure alarm is activated.
PRACTICAL EXAMPLE OF A STOP OPERATION
NOTE
It is advisable before starting the starting cycle that the general circuit breaker
of the genset is in the OFF position.
1. Manual: Pressing the STOP button once. To perform a stop with cooling cycle.
2. Manual: Pressing the STOP button twice. To perform a stop without cooling
cycle.
3. Turning the panel's activation key to the “O” position. To perform a stop
without cooling cycle.
4. Automatic: After cancelling the order which leads to the automatic start and
in this way performing a stop with cooling.
Sequence: Pressing the STOP button once the stop cycle begins with engine
cooling. This is indicated with the STOP button lighting up. (1)
Fig.1
OPERATION | PAGE 13

Himoinsa CEM7 Specifications

General

Brand	Himoinsa
Model	CEM7
Category	Control Unit
Language	English