ALARMS HYSTERESIS: The alarms functioning depends furthermore on
the alarms hysteresis ("HALn" parameter), which works in asymmetric
mode. More precisely, in case of minimum alarm, the alarm will be
activated when the process value goes under the alarm set and will be
deactivated when it goes upper than the alarm set + "HALn"; in case of
maximum alarm, the alarm will be activated when the process value goes
upper than the alarm set and will be deactivated when it goes under the
alarm set - "HALn". In case of window alarms, the minimum alarm
example is applicable to the lowest set ("ALnL") while the maximum alarm
example is applicable to the higher set ("ALnH").
b - ALARM LATCH
:
It's possible to have 2 different alarm output
behaviours, depending on the value of the second figure code.
0 = ALARM NOT LATCHED: The alarm remains active only in alarm
conditions.
1 = ALARM LATCHED: The alarm is activated when there are alarm
conditions and remains active although these conditions are not existing
anymore, till is not pushed the "LEFT" key.
c- START-UP BEHAVIOUR
:
It's possible to have 2 different alarm output
behaviours, depending on the value of the third figure code.
0 = NORMAL BEHAVIOUR: The alarm is always activated when there are
alarm conditions.
1 = ALARM NOT ACTIVE AT START-UP: If at start-up the instrument is
in alarm conditions this is not activated.
d - OUTPUT LOGIC MODE
:
It's possible to have 2 different alarm output
behaviours, depending on the value of the fourth figure code.
1 = OUTPUT ON IN ALARM CONDITIONS: The output is activated when
the alarm is active, while is deactivated while the alarm is not active.
0 = OUTPUT OFF IN ALARM CONDITIONS: The output is activated
when the alarm is not active, while is deactivated while the alarm is active.
4.6 - HEATER BREAK ALARM FUNCTION (HB)
The instrument can be furnished with the Heater Break alarm function.
(Alarm in case of broken heating element ), in this case it will have an
input (TAHB) able to measure the load current driven by C1 output. This
kind of input accepts signals coming from current transformers (TA) till a
maximum of 200 mA (at 200 mA the instrument measure a value of 100.0).
Therefore, to obtain the correct Ampere measure it will occur that TA ratio
would be 1/0,002. Tecnologic can supply 2 standard models : TR 03536 :
25A / 0,05 A, TR 03537 : 100 A / 0,2 A . During the functioning it's
possible to visualise on SV display the current measured by TAHB input,
expressed in Ampere (if obviously the TA ratio is 1/0,002) pushing "LEFT"
key. The alarm will be active when, in C1output active conditions, the
current measured by TAHB input will results lower than the value set on
"ALHb" parameter. "ALHb" parameter has to be programmed with the
value of the current normally taken over by the load driven by C1 output,
considering as well the network tension fluctuations , in order to avoid
undesired alarms. As regard the HB alarm hysteresis it's automatically
calculated by the instrument as 2% of "ALHb" and the behaviour is the
same as a minimum alarm. If it's desired to deactivate the HB alarm, it's
enough to program "ALHb" = 0.0.
It's possible to have 2 different HB alarm output behaviours, depending on
the "rLHb" parameter programmed.
"nO" = NORMALLY OPENED
:
The output is activated when the alarm is
active, while is deactivated when the alarm is not active.
"nC" = NORMALLY CLOSED: The output is activated when the alarm is
not active, while is deactivated when the alarm is active.
Notes :
The current measure trough TAHB input needs at least 100 mS.
5 - PROGRAMMING
Push key "P" and keep it pushed for about 2 seconds, the instrument will
show on the higher display PV the code of the first parameter ("SEtP") and
on the lower display SV the programmed value with one figure flashing.
This indicates that it's possible to modify it pushing "UP" key. When it's
desired to modify a different figure it's necessary to select it, by means of
"LEFT" key and then modify it using "UP" key. Once set the desired value
pushing key "P" on the display will be shown the code of the next
parameter. Working on "LEFT" and "UP" keys, as above described, is then
possible to modify it. Once set the desired values push key "P" several
times till the instrument goes out of the parameters programming, going
back to the normal conditions of functioning visualising the process value
on display PV and the Set Point value on display SV. Otherwise the
instrument goes automatically out from the programming mode after about
50 seconds starting by the moment of the last push on the keys. The last
parameter of the first level which appears on PV display is "PASS" : this is
the request of the PASSWORD to accede to the second level parameters. To
do this it's necessary to set, on Password request, the number written on
the last page of this manual, and then push "P" key. If it's set the wrong
Password the instrument goes out from the programming. The modality of
programming of the second level parameters and the operations to go out
by them are exactly the same as described for the first level parameters.
P.A.:
During the instrument programming the regulation is not activated
and the alarm outputs remain in the original conditions, as before the
programming input. Always go out regularly from the programming phase
because, if the instrument is switched-off during the programming, at the
next switching-on will be signalised a memory error, visualised by the
message "Err EEPr". To re-establish the functioning is needed therefore to
push, at the same time, "P" and "LEFT" keys and then get into the first
level parameter programming, go out regularly, even if no parameters are
changed. When programming operating parameters some parameters will
TECNOLOGIC - THP 98
USER MANUAL (I - GB) - Vr. 01 - ISTR 00372 - PAG. 10
