Enable valve alarm at end travel (‘blo’)
Parameter P14 is used to enable/disable the valve blocked alarm signal (‘blo’).
Code Description Def Min Max UOM User
User
terminal
P14
Enable valve alarm at end travel (‘blo’)
1 = signal enabled
1 0 1 - M NO
Signal alarms from Slave to Master
Master controllers, if Ar=1, can indicate a Slave with an alarm in the LAN. If an alarm occurs on a Slave, the
Master shows the signal “nx”, alternating with the temperature display, where x is the address of the
Slave with the alarm (x=1 to 9). If parameter DOb is set on the Master (value other than zero), then the
master alarm relay is also activated.
Code Description Def Min Max UOM User
User
terminal
Ar
Signal alarms from Slave to Master
0/1 = not enabled/enabled
1 0 1 - S NO
8.6 HACCP
alarms
(HACCP = Hazard Analysis and Critical Control Point).
Specific alarms for controlling the operating temperature, recording any anomalies due to power failures
or an increase in the temperature due to other causes (breakages, extreme operating conditions, user
errors, etc.); see “HACCP alarm parameters and monitoring activation” for details.
Two types of potentially critical HACCP events are managed:
l type HA alarms, high temperature during operation;
example:
The critical temperature was exceeded, the alarm was not managed and the temperature remained
above the threshold for longer than the maximum tolerable time. (thresholds defined by site HACCP
procedures). The event is critical and potentially hazardous.
l type HF alarms, high temperature after power failure;
example:
The unit was powered off. When restarted, the temperature is above the threshold and does not
return to an acceptable level within an appropriate time. (parameters defined by site HACCP
procedures). The event is critical and potentially hazardous.
When an alarm occurs, the HACCP LED flashes, the display shows the alarm code, the alarm is logged and
the alarm relay and buzzer are activated.
8.6.1 Parameters and monitoring activation
Type HA alarms
The type HA alarm is generated if during normal operation the temperature read by the probe set for
parameter AA exceeds the high temperature threshold for the time Ad+Htd. Consequently, compared to
the normal high temperature alarm already signalled by the controller, the type HA HACCP alarm is
delayed by a further time Htd specifically for HACCP recording.
Code Description Def Min Max UOM User
User
terminal
Htd
HACCP alarm delay
0 = moniotring disabled
0 0 240 min S NO
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