CEM7 CONTROL UNIT ALARMS | PAGE 49
HIGH TEMPERATURE PT100 PROBES 5 TO 8 REQUIRE CCPT100 PROBES
EXPANSION.
The CEM7 control unit’s high temperature alarm for PT100 probes 5 to 8 is
associated to the analogue inputs for PT100 temperature of the analogue input
expansion. The high temperature alarm for PT100 probes 5 to 8 is activated
when a temperature value above the programmed limit (Thresholds table,
parameters 52-55) is detected or when the probe is detected as not connected.
Detection of the high temperature alarm for PT100 probes 5 to 8 is set by default
(Alarms table, parameter 183, 186, 189 and 192) to be activated: Never.
A high temperature alarm for PT100 probes 5 to 8 can be associated a debounce
time (Alarms table, parameters 184, 187, 190 and 193) during which it must be
detected that the water temperature is above the limit set (Thresholds table,
parameters 52 to 55).
The high temperature alarm for PT100 probes 1 to 4 is set by default (Alarms
table, parameters 185, 188, 191 and 194) to perform no action (warning).
HIGH TEMPERATURE PT100 PROBES 5 TO 8 LEVEL 2: REQUIRE CCPT100
PROBES MODULE EXPANSION.
The CEM7 control unit’s high temperature alarm for PT100 level 2 probes 5 to 8
is associated to the analogue inputs for PT100 temperature of the analogue
input expansion. The high temperature alarm for PT100 probes 5 to 8 is activated
when a higher temperature is detected than the programmed limit (Thresholds
table, parameters 56 to 59). The use of a second temperature level to generate
alarms allows warnings to be generated 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 5 to 8 is set by
default (Alarms table, parameters 195, 198, 201 and 204) to be activated:
Never.
A high temperature alarm for PT100 level 2 probes 5 to 8 can be associated a
debounce time (Alarms table, parameters 196, 199, 202 and 205) during which
a temperature that is higher than the programmed limit (Thresholds table,
parameters 56 to 59) must be detected.
The high temperature alarm for PT100 level 2 probes 5 to 8 is set by default
(Alarms table, parameters 197, 200, 203 and 206) to perform no action
(warning).
PROGRAMMABLE ALARMS 6 TO 20
The CEM7 control unit’s programmable alarms 6 to 20 are activated associating
the operating mode of the programmable alarms (Settings table, parameter 26 -
programmable alarm 6-, 27 - programmable alarm 7-,…40 -programmable alarm
20-) to one of the general purpose digital inputs (ENT1, ENT2, ENT3, ENT4 or
ENT5) or one of the engine alarm inputs (ATA, BPA or NA) in the J1939 option.
The status of this input must be validated during a time interval (Times table,
parameter 19, 20, 22, 23 or 24) for stabilisation (debounce) before generating
any of the programmable alarms 6 to 20.
Detection of the programmable alarms 6 to 20 is set by default (Alarms table,
parameters 183 —programmable alarm 6—, 186 —programmable alarm 7—…
249 —programmable alarm 20) to be activated: Never.
Programmable alarms 6 to 20 can be associated with a time (Alarms table,
parameter 184 —programmable alarm 6—, 187 —programmable alarm 7—…
250 —programmable alarm 20) to delay the moment at which the alarm begins
to conrm the alarm conditions.
Detection of the programmable alarms 6 to 20 is set by default (Alarms table,
parameters 185 —programmable alarm 6—, 188 —programmable alarm 7—…
251 —programmable alarm 20) to perform no action (warning).
Programmable alarms 6 to 20 can be associated with a programmable text that
appears on the display of the visualization module when the active alarm is
detected.
GENSET LOW POWER ALARM (CEM7 VER462)
The CEM7 control unit’s genset low power alarm is associated to the actual
measured power of the genset. The alarm is set off when the power generated by
the genset falls below a programmable percentage (Threshold table, parameter
60) of the rated kW set (Threshold table, parameter 9) during a programmable
interval of time (anti-rebound) (Alarms table, parameter 253).
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