32
4 - Operation
Absolute alarm
Active high
é-fsH
Active low
é-fsl
hyd hyu
On
Off
On
Off
Alarm threshold
High rangeLow range
Deviation alarm
Active high
Active low
é-del
hyd hyu
On
Off
On
Off
SP
Alarm threshold
+ range- range
é-deH
Band alarm
Active out
é-bnd
hyd hyu
On
Off
SP
Alarm threshold
full scale
full scale
hyd hyu
∆SP
∆SP ∆SP
4.3.6 AL1, AL2, AL3, AL4 ALARMS CONFIGURATION [A] OPERATING
CONDITIONS
It is possible to configure up to 4
alarms: AL1, AL2, AL3, AL4 (see
page
31) selecting, for each of them:
A the type and the operating condi-
tion of the alarm (table 11 page 31)
B the functionality of the alarm
acknowledge (latching)
#ltch
C the start-up disabling (blocking)
#bloc
D alarm inhibition on sensor break
E the physical output of the alarm
#OpI #Op2 #Op3 #Op4
The outputs can be used for
alarms if they are not used as
control outputs
(see par.
3.3.7 page 20)
It is possible to route up to 4 alarm
to a single output (OR of the alarms).
Alarm occurrence display
This function can be enabled by the
configuration software.
Please, read the user manual:
“gammadue
®
and deltadue
®
con-
troller series serial communica-
tion and configuration
software”.
[B] ALARM ACKNOWLEDGE
FUNCTION
The alarm, once occurred, is pre-
sented on the display until to the time
of acknowledge. The acknowledge
operation consists in pressing any key.
After this operation, the alarm leaves
the alarm state only when the alarm
condition is no longer present.
275.0
3deH
The type of alarm is presented
flashing, on the front panel in
alternation with the PV value.
The red led of the activated
alarm output is on.
x5-uk-ed5 17-09-2009 14:53 Pagina 32
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