Himoinsa CEM7 - Page 47

CEM7 CONTROL UNIT ALARMS | PAGE 47
Detection of the high temperature alarm for PT100 probes 1 to 4 is set by default
(Alarms table, parameter 132, 135, 138 and 141) to never be activated. A high
temperature alarm for PT100 probes 1 to 4 can be associated a debounce time
(Alarms table, parameters 133, 136, 139 and 142) during which it must be
detected that the water temperature is above the limit set (Thresholds table,
parameters 39 to 42).
The high temperature alarm for PT100 probes 1 to 4 is set by default (Alarms table,
parameter 134, 137, 140 and 143) to perform no action (warning).
ENGINE J1939 COMMUNICATION
The engine J1939 communication alarm veries proper communication between
the CEM7 control unit and the engine via the J1939 bus. This alarm is only
available for control units which have the J1939 option installed.
Detection of the engine J1939 communication alarm is set by default (Alarms
table, parameter 144) to be activated when starting:
The engine J1939 communication alarm can be associated a rebounce time to
ensure proper alarm detection (Alarms table, parameter 145).
The engine J1939 communication alarm is set by default (Alarms table,
parameter 146) to perform no action (warning).
HIGH TEMPERATURE PT100 PROBES 1 TO 4 LEVEL 2 (CEM7 VER461 /
PHG7 VER419 OR HIGHER): REQUIRE CCPT100 PROBES MODULE EXPANSION
The CEM7 control unit's high temperature alarm for PT100 level 2 probes 1 to 4
is associated to the analogue inputs for PT100 temperature of the analogue
input expansion. The high temperature alarm for PT100 probes 1 to 4 is activated
when a higher temperature is detected than the programmed limit (Thresholds
table, parameter 43 to 46). The use of a second temperature level to generate
alarms allows the generation of warnings in advance of the temperature alarm
with management that is independent of the alarm.
Detection of the high temperature alarm for PT100 level 2 probes 1 to 4 is set by
default (Alarms table, parameter 147, 150, 153 and 156) to never be activated.
A high temperature alarm for PT100 level 2 probes 1 to 4 can be associated a
debounce time (Alarms table, parameters 148, 151, 154 and 157) during which
it must be detected that the temperature is above the limit set (Thresholds table,
parameters 39 to 42).
It is possible to program a delay before checking the genset contactor failure
alarm (Times table, parameter 13) to allow time for proper activation of the
contactor. The status of this programmable input associated to the conrmation
mode of the genset contactor must be validated during a time interval (Times
table, parameter 19, 20, 22, 23 or 24) for stabilisation before being managed. To
enable the genset contactor failure alarm a set programmable input must be
assigned (ENT1, ENT2, ENT3, ENT4 or ENT5) which is associated to the
conrmation mode of the genset contactor (Settings table, parameter 6).
Management of the genset contactor failure alarm can be congured (Alarms
table, parameter 102) to:
• Not perform the detection.
• Perform the detection and before activation stop the engine with
cooling.
GENSET POWER ALARM
The CEM7 control unit's genset power alarm is associated to the actual genset
power measured. When the power generated by the genset exceeds a
programmable percentage (Thresholds table, parameter 38) of the nominal power
set (Thresholds table, parameter 9) during a programmable interval of time
(debounce) (Alarms table, parameter 130).
Detection of the genset power alarm is set by default (Alarms table,
parameter 129) to be activated: Under nominal engine conditions. The genset
power alarm is set by default (Alarms table, parameter 131) to perform no action
(warning).
HIGH TEMPERATURE PT100 PROBES 1 TO 4 REQUIRE CCPT100 PROBES
EXPANSION
The CEM7 control unit's high temperature alarm for PT100 probes 1 to 4 is
associated to the analogue inputs for PT100 temperature of the analogue input
expansion.
The high temperature alarm for PT100 probes 1 to 4 is activated when a
temperature value above the programmed limit (Thresholds table, parameters
39-42) is detected or when the probe is detected as not connected.