Alarm Function - CD Automation Revo TC 2ph User Manual

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14.3.1 Alarm Function

General notes:
A aut atic regu ati
In general, the alarms are "digital" elements or rather elements that can take only two values (true or false)
because rhe condition that describes the alarm can only be 'true' (ON) or "false" (OFF).
The condition that describes the alarm is usually summarized by the ALARM FUNCTION because it defines
its behavior.
Over the years, depending
types f a ar
(f r exa p e a ar s tre ds a ar s gr up put a ar s etc
Here we wi y c sideri g a ar s
The Fu cti s f the a ar s i the c
1) Pr cess a ar ( r abs ute)
2) Ba d A ar
3) Deviati A ar
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1) Process alarm (or absolute)
The process alarm can be of two types:
A) Up a ar
B) " w a ar
Ge era y the pr cess a ar
the va ue assig ed t the a ar
A)
If it is a Up alarm, the a ar
B)
If it is a Low alarm, the alarm will be ON when the measured value is less than the threshold value
() * AS)
c tr a d r supervisi
the specific eeds f vari us syste s have bee deve ped
r a y i p e e ted
tr er are 3 as f
is a a ar which c
(SA) (Thresh d va ue)
wi be '( whe the
ta es i t c siderati
)
this c
ws
pares the i sta ta e us va ue f the
easured va ue exceeds the thresh d va ue
pag. 33 di 122
differe t a ar s
a y differe t
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easure (#) with