LodE
= DEVIATION LOW ALARM: The alarm is activated when
the process value goes below the value [SP1 + AL1] and will be
deactivated when it goes above the value [SP1 + 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 [SP1 + AL1] and will be
deactivated when it goes below the value [SP1 + 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 [SP1 + AL1L] or goes
above than the value [SP1 + AL1H] and will be deactivated when it
goes below the value [SP1 + AL1H - HAL1] or when it goes above
the value [SP1 + 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).
4.15 - HEATER BREAK ALARM FUNCTION (HB)
All the parameters referring to the Heater Break alarm function are
contained in the group
“
]
Hb”.
The Heater Break alarm function (Breakage of the heating element)
is only available when the instrument is equipped with the input
(TAHB) to measure the current and if use a digital output to control
the load.
This input accepts signals coming from current transformers (TA)
with max. output 50 mA.
The first operation to be carried out in order to obtain a correct
current measurement, is to set the current that the instrument has
to measure at the end of scale of the input TA (50 mA) on par.
“IFS”
.
T L K 9 4
T A
E H
K M
L o a d
P o w e r
S u p p l y
A C
5 b 6 b
o u t 1 . r E G
It is necessary to establish to which output the alarm has to
correspond.
To do this it is necessary to set the parameter relative to the output
to be used (“O1F”, “O2F”, “O3F”, “O4F”, “O5F”, “O6F”) in the
groups
“
]
Out”,
programming the parameter as :
TECNOLOGIC spa - TLK 94
-OPERATING INSTRUCTIONS - Vr.01 - 01/10 - ISTR-MTLK94ENG1 - PAG. 10
