Eliwell EWHT 1800LX, Manual

Page: 60 / 142

The temperature limits defined by parameters 1081: HAL / 1082: LAL are characterised by the parameter 1079: 1079: 1079: 1079: Att Att Att Att which
determines whether they represent the absolute temperature or a differential relative to the Setpoint ( SEt SEt SEt SEt ).
•
•
If 1079: 1079: 1079: 1079: Att Att Att Att =1 rE(lative), the probe temperature limits are relative to the Setpoint ( SEt SEt SEt SEt ).
If 1079: 1079: 1079: 1079: Att Att Att Att =0 Ab(solute), the probe temperature limits are absolute.
NOTE: NOTE: NOTE: NOTE: to generate an alarm when the value falls below the setpoint when Att=0 (relative), a negative value must be
entered for LAL.
Max/min Max/min Max/min Max/min
temperature temperature temperature temperature
temperature
temperature temperature
temperature alarm
alarm alarm
alarm
output output output output
A digital output (relay) can be configured by setting parameter H21 H21 H21 H21 ( H21 H21 H21 H21 … H25 H25 H25 H25 if present). so that a device can be
activated (usually sound or visual) when the alarm occurs.
NOTE
NOTE NOTE
NOTE
: if the device has a buzzer, the relative configuration must also be checked (see Buzzer Configuration)
16.3.2 16.3.2 16.3.2 16.3.2 High/low High/low High/low High/low temperature temperature temperature temperature alarm alarm alarm alarm exclusion exclusion exclusion exclusion times times times times
Alarm
Alarm
Alarm Alarm exclusion
exclusion
exclusion exclusion
time time time time
Alarm Alarm Alarm Alarm signal signal signal signal delay delay delay delay
Alarm Alarm Alarm Alarm exclusion exclusion exclusion exclusion
time
time time
time after
after after
after defrost
defrost defrost
defrost
Using parameter 1083: 1083: 1083: 1083: PAO PAO PAO PAO you can set, when the device device device device is switched on, an alarm alarm alarm alarm exclusion exclusion exclusion exclusion delay delay delay delay .
This parameter refers to high/low temperature alarms only
During this interval, the regulator is disabled and any temperature alarms are not signalled.
Using parameter 1087: 1087: 1087: 1087: tAO tAO tAO tAO you can set a delay for the signalling of the alarm when it occurs.
This parameter refers to high/low temperature alarms only
During this interval, the regulator is disabled and any temperature alarms are not signalled.
Using parameter
1085:
1085: 1085:
1085: tAO
tAO tAO
tAO
you can set a delay for the signalling of the alarm after defrosting.
This parameter refers to high/low temperature alarms only
During this interval, the regulator is disabled and any temperature alarms are not signalled.
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