"AL1t" – ALARM TYPE :
the alarm output can behave in six
different ways.
LoAb
= ABSOLUTE LOW ALARM: The alarm is activated when the
process value goes below the alarm threshold set on parameter
"AL1” and will be deactivated when it goes above the value
[AL1+HAL1].
With this mode is possible to program the minimum and the
maximum set of “AL1” by “AL1L” and “AL1H” parameters.
HiAb
= ABSOLUTE HIGH ALARM: The alarm is activated when the
process value goes higher than the alarm threshold set on
parameter "AL1" and will be deactivated when it goes below the
value [AL1 - HAL1].
With this mode is possible to program the minimum and the
maximum set of “AL1” by “AL1L” and “AL1H” parameters.
LoAb
off
ON
AL1
AL1
PV
HiAb
HAL1
time
off
ON
AL1
PV
time
HAL1
off
off
ON
OUT
off
off
ON
OUT
AL1
LodE
= DEVIATION LOW ALARM: The alarm is activated when the
process value goes below the value [SP + AL1] and will be
deactivated when it goes above the value [SP + AL1 + HAL1].
With this mode is possible to program the minimum and the
maximum set of “AL1” by “AL1L” and “AL1H” parameters.
HidE
= DEVIATION HIGH ALARM: The alarm is activated when the
process value goes above the value [SP + AL1] and will be
deactivated when it goes below the value [SP + AL1 - HAL1].
With this mode is possible to program the minimum and the
maximum set of “AL1” by “AL1L” and “AL1H” parameters.
LodE
ON
off
PV
SP
-AL1
HAL1
time
off
ON
SP
AL1
PV
HidE
time
HAL1
ON
off
off
off
off
ON
OUT
AL1
OUT
AL1
LHAb
= ABSOLUTE BAND ALARM: The alarm is activated when
the process value goes under the alarm threshold set on parameter
"AL1L" or goes higher than the alarm threshold set on parameter
"AL1H" and will be deactivated when it goes below the value [AL1H
- HAL1] or when it goes above the value [AL1L + HAL1].
LHdE
= DEVIATION BAND ALARM: The alarm is activated when
the process value goes below the value [SP + AL1L] or goes above
than the value [SP + AL1H] and will be deactivated when it goes
below the value [SP + AL1H - HAL1] or when it goes above the
value [SP + AL1L + HAL1].
LHAb
ON
off
AL1H
AL1L
PV
ON
time
off
HAL1
HAL1
SP
- AL1L
AL1H
PV
time
LHdE
HAL1
HAL1
off
off
ON
ON
off
off
OUT
AL1
OUT
AL1
"
Ab1" - ALARM CONFIGURATION:
This parameter can assume a
value between 0 and 31.
The number to be set, which will correspond to the function desired,
is obtained by adding the values reported in the following
descriptions :
ALARM BEHAVIOUR AT SWITCH ON: the alarm output may
behave in two different ways, depending on the value added to par.
“Ab1”.
+0 = NORMAL BEHAVIOUR: The alarm is always activated when
there are alarm conditions.
+1 = ALARM NOT ACTIVATED AT SWITCH ON: If, when switched
on, the instrument is in alarm condition, the alarm is not activated. It
will be activated only when the process value is in non-alarm
conditions and then back in alarm conditions.
P V
+ 1
+ 0
t i m e
A L 1
O N
O N
O N
o f f
o f f
o f f
o f f
A b 1
exemple with absolute low alarm
ALARM DELAY: the alarm output may behave in two different
ways depending on the value added to par. “Ab1”.
+0 = ALARM NOT DELAYED: The alarm is immediately activated
when the alarm condition occurs.
+2 = ALARM DELAYED: When the alarm condition occurs, delay
counting begins, as programmed on par. “AL1d” (expressed in
sec.) and the alarm will be activated only after the elapsing of that
time.
ALARM LATCH: : the alarm output may behave in two different
ways depending on the value added to par. “Ab1”.
+ 0 = ALARM NOT LATCHED: The alarm remains active in alarm
conditions only.
+ 4 = ALARM LATCHED: The alarm is active in alarm conditions
and remains active even when these conditions no longer exist,
until the correctly programmed key “U”, (“USrb”=Aac) has been
pushed.
A L 1
P V
O N
O N
t i m e
+ 0
A b 1
+ 4
o f f
o f f
o f f
exemple with absolute high alarm
ALARM AKNOWLEDGEMENT: : the alarm output may behave in
two different ways depending on the value added to par. “Ab1”.
+ 0 = ALARM NOT AKNOWLEDGED: The alarm always remains
active in alarm conditions.
+ 8 = ALARM AKNOWLEDGED: The alarm is active in alarm
conditions and can be deactivated by key “U” if properly
programmed (“USrb”=ASi), and also if alarm conditions still exist.
ALARM BEHAVIOUR AT SET POINT CHANGE (DEVIATION
ALARMS ONLY): the alarm output may behave in two different
ways, depending on the value added to par. “Ab1”.
+0 = NORMAL BEHAVIOUR: The alarm is always activated when
there are alarm conditions.
+16 = ALARM NOT ACTIVATED AT SET POINT CHANGE: If,
when Set Point change, the instrument is in alarm condition, the
alarm is not activated. It will be activated only when the process
value is in non-alarm conditions and then back in alarm conditions.
"AL1i" - ALARM ACTIVATION IN CASE OF MEASUREMENT
ERROR:
This allows one to establish how the alarm have behave
in the event of a measurement error (yES=alarm active; no=alarm
deactivated).
TECNOLOGIC spa - TLK 38
- OPERATING INSTRUCTIONS - Vr. 03 - ISTR 06519 - PAG. 8
