EsiWelma Sensigas EW40, Инструкция по установке и эксплуатации

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Type / N.
Rev. Data Page Total pages
EW095.605 5 November 2010
34 96
EsiWelma
s.r.l.
5.2 Displays of the status screen
The status screen displays identify the operating condition of the overall system.
It is separated lengthwise in two areas dedicated respectively to:
•
cumulative display of the alarms (left area of the window)
•
display of the power supply status (right area of the window).
The alarm conditions can be:
•
NONE meaning no field device is in alarm condition (see Fig. 5.5)
•
FA meaning at least one field device fail
•
PRE meaning at least one field device in pre-alarm condition
•
PRE, 1T meaning at least one field device in threshold one alarm condition
•
PRE, 1T, 2T meaning at least one field device in threshold two alarm condition
1
The example in figure 5.6 below, shows a condition where in the system at least one sensor
failed and at least one sensor is in threshold two alarm.
Basically, the three lines available to indicate alarms are “composed” differently according to
the number and type of alarms present in the system. In other words, if in the example
above there are no threshold two alarm statuses, on the last line only 1T would appear, in
line with the wording FA and PRE.
1
It is obvious that if a sensor is in threshold one or threshold two alarm, the pre-alarm or threshold one
conditions will also be active for it.
On the other hand, in the event of alarms from Alarm Modules, these can be exclusively pre-alarm, threshold
one or threshold two, without the previous thresholds being active.
A L A R M S P W R . S U P P L Y
N O N E M A I N
Fig. 5.5
A L A R M S P W R . S U P P L Y
F A
P R E M A I N
1 T 2 T
Fig. 5.6