Danfoss AK2-SC 255, Справочное руководство, Страница: 124 / 206

RS.8D.M1.22 AK2-SC 255 Reference Manual 123
The fields and their meanings are as follows:
Type (Label field ) In the top line for each alarm, the
leftmost column shows the type of alarm.
Name (Label field) The name of input, either digital or analog,
that trips the alarm. (See note at the end of the discus-
sion of this screen about “Alarms Suspended” alarms.)
Address (Label field) The board and point assignment of the
input given under Name. This is where the input is
physically wired. For example, the phase loss digital
input, the second alarm in the screen shown above, is
wired to point 1 on board 8. The suction pressure
sensor (an analog input) for rack C is wired to point 1
on board 6.
Alarm Action (List box) In the Type column, in the second line for
each alarm, is the current alarm action setting. Initially,
as shown above, all alarms are set to disabled as they
are automatically created during configuration of
refrigeration. The same is true of the alarms created
for HVAC and other store systems. We can use this
screen to change the alarm action levels. The choices
in the list box are these:
Disabled: The alarm is deactivated and will not occur
or dial out. Its configuration settings, if any, will remain
in memory for future activation. All alarms are in this
state initially until you change them. A description of
each enabled alarm action follows....
Log Only: The occurrence of the alarm will only be
logged by the system. There will be no dial out. The
alarm will not retrip until its causative condition has
returned to normal and then occurred again.
Normal: The alarm will occur when its causative
condition has been true for the set time limit. At this
action level, the alarm will dial out once. It will not dial
out again until its causative condition has become false
and then become true again for the set time limit.
Critical: When the alarm’s causative condition has
been true for the set time limit, the critical alarm will
occur and dial out, and it will continue to dial out
repeatedly as long as the causative condition remains
true. Repetitive dialouts will occur at the interval
specified in the Alarm Routing screen. (See also the
section on Alarm Routing.)
Delete: The alarm and its settings are removed from
memory. Restoration of the alarm requires manual re-
entry.
Alarms Suspended The first alarm on the first page of every rack alarms screen is an Alarms Sus-
pended alarm. This alarm occurs whenever alarms have been suspended by an
operator using the Rack Service screen. When alarms are suspended, if the level of