Himoinsa CEM7 - High Battery Voltage

CEM7 CONTROL UNIT ALARMS | PAGE 39
The battery alternator failure alarm is set by default (Alarms table, parameter 12)
to perform no action (warning).
STARTING FAILURE
The CEM7 control unit's starting failure alarm is generated if the number of
consecutive retries (Times table, parameter 1) and failures is exceeded during
engine start. Between each start attempt a programmable delay is observed
(Times table, parameter 2). Once the alarm has been generated the control unit
waits for the notication by the user before retrying the engine starting process.
LOW WATER LEVEL
The CEM7 control unit's low water level alarm is associated with the digital input
specically for the low water level (NA) or errors detected by the engine's CIU
(only J1939 option). The status of this input must be validated during a time
interval (Times table, parameter 18) for stabilisation (debounce) before
generating the low water level alarm.
It can be congured as normally open or normally closed (Regulations table,
parameter 8).
Detection of the low water level alarm is set by default (Alarms table,
parameter 16)to be activated: Always.
A low water level alarm can be associated with a time (Alarms table,
parameter 17) to delay the moment at which the alarm begins to conrm the
alarm conditions.
The low water level alarm is set by default (Alarms table, parameter 18) to always
perform an immediate stop of the engine if it is not already stopped.
NOTE
In the J1939 option the NA input can be assigned to a programmable alarm. In
this case, the alarm detection is performed by the engine's CIU and transmitted
by the communication bus J1939.
NOTE
In the J1939 option the BPA input can be assigned to a programmable alarm. In
this case, the alarm detection is performed by the engine's CIU and transmitted
by the communication bus J1939.
EMERGENCY STOP (ACTION NOT PROGRAMMABLE)
The CEM7 control unit's emergency stop alarm is associated with the digital
input specically provided for emergency stops (PEM or SETA).
It can be congured as normally open or normally closed (Regulations table,
parameter 11).
Similarly, the emergency stop alarm is also associated with the SETA input of the
measurements module; said input cuts power to the power outputs of the
measurements module (stops engine) ensuring the engine shutdown is set as
stop via de-energisation (Regulations table, parameter 18) independently of the
control unit's electronics. With engines set to stop while powered, the input must
be earthed.
The emergency stop alarm always executes the engine shutdown without cooling.
It is not possible with this action to associate any delay time, set to engage
immediately after detecting the emergency stop input (PEM).
BATTERY CHARGING ALTERNATOR FAILURE
The CEM7 control unit's battery charging failure alarm is associated with the
analogue input for the battery charging alternator voltage (DI). The voltage
measured via said input must exceed the voltage threshold for detecting that the
engine has started (Thresholds table, parameter 21); otherwise, this battery
alternator failure alarm is activated.
The battery alternator failure alarm is set by default (Alarms table, parameter 10)
to be activated when it is detected that the engine has been started.
A battery alternator failure alarm can be associated a debounce time (Alarms
table, parameter 11) during which the voltage measured via the DI input must be
kept below the detection threshold for the started engine as a condition causing
the activation of the battery alternator failure alarm.