ASCON TECNOLOGIC - TLI 40 - OPERATING INSTRUCTIONS -
PAG. 6
Releasing the key, the instrument starts normal measurement
acquisition once more.
= d.Pic:
Pressing the key, the maximum variation of the
measurement recorded since the instrument was switched on is
visualized on the display (highest peak - lowest peak).
= 0.Pot:
For the instruments equipped with a potentiometer input, it
is possible to set the “zero” value with this function. Pressing the key
for at least 1 sec., the display will show the writing
"0.Pot"
for
approx. 1 sec, and then "0", assuming the value measured in that
instant as 0 .
= r.Pic:
Pressing the key, the highest and lowest peak values are
re-set.
= r.P0P:
For the instruments equipped with potentiometer input, it is
possible to set the “zero” value and contemporarily re-set the
highest and lowest peak values with this function . Pressing the key
for at least 1 sec., the display will show the writing
"r.P0P"
for
approx. 1 sec., and then "0", assuming the value measured in that
instant as 0 and re-setting the memorized peak values.
= t.Pot
: For the instruments equipped with potentiometer input, with
this function it is possible to set the points of measurement of the
potentiometer by means of auto-ranging procedure through which
the parameters “SSC", "FSC" and "0.Pot." are automatically re-
calculated.
Pressing the key for at least 1 sec., the display will show
"P1"
alternatively to the value of the first point of setting. Now, position
the potentiometer at the first point of setting and program the value
desired for that point using the UP and DOWN keys. Once the value
has been set, press the P key : the instrument will memorize the
value and the display will show
"P2"
alternatively to the value of the
second point of setting. Position the potentiometer at the second
point of setting and program the value desired for that point using
the UP and DOWN keys. Pressing the P key, the second value is
also acquired and
the instrument will automatically exit from the self-
learning mode, re-calculating the measuring range.
4.6 – DIGITAL INPUT
The instrument can also be equipped (in alternative to OUT4) with a
digital input whose function can be set by the parameter
"diF"
contained in the group
“
]
InP”.
The parameter can be programmed as:
= noF
: the input does not carry out any function
= AaC
: By closing the contact connected to the digital input, it is
possible to reset a memorised alarm (see par. 4.4.1)
= ASi:
By closing the contact connected to the digital input, it is
possible to silence an active alarm (see par. 4.4.1)
=
HoLd
: By closing the contact connected to the digital input the
measurement taken at that moment is blocked (N.B.: not the
reading on the display, therefore the indication may stabilise itself
with a delay that is proportional to the measuring filter). With the
hold function turned on, the instrument carries out control according
to the memorised measurement. By opening the contact, the
instrument starts normal measurement acquisition once more.
= r.Pic:
By closing the contact connected to the digital input the
highest and lowest peak values are re-set.
= 0.Pot:
For the instruments equipped with a potentiometer input, it
is possible to set the “zero” value with this function. By closing the
contact connected to the digital input assuming the value measured
in that instant as 0 .
= r.P0P:
For the instruments equipped with potentiometer input, it is
possible to set the “zero” value and contemporarily re-set the
highest and lowest peak values with this function . By closing the
contact connected to the digital input assuming the value measured
in that instant as 0 and re-setting the memorized peak values.
4.7 - RS 485 SERIAL INTERFACE
The instrument can be equipped with a RS 485 serial
communication interface, by means of which it is possible to
connect the regulator with a net to which other instruments
(regulators of PLC) are connected, all depending typically on a
personal computer used as plant supervisor. Using a personal
computer it is possible to acquire all the function information and to
program all the instrument’s configuration parameters. The software
protocol adopted for TLI40 is a MODBUS RTU type, widely used in
several PLC and supervision programs available on the market (TLI
protocol manual is available on request).
The interface circuit allows the connection of up to 32 instruments
on the same line.
To maintain the line in rest conditions a 120 Ohm resistance (Rt)
must be connected to the end of the line.
The instrument is equipped with two terminals called A and B which
have to be connected with all the namesake terminals of the net.
For the wiring operation they must be interlaced with a double cable
(telephonic type) and all the GND terminals must be connected to
the ground. Nevertheless, particularly when the net results very long
or noised and being present potential differences between the GND
terminals, it is advisable to adopt a screened cable wired as in the
drawing.
If the instrument is equipped with a serial interface, the parameters
to be programmed are the following, all present in the parameters
group
“
]
SEr”
:
"Add"
: Address of the station. Set a different number for each
station, from 1 to 255.
"baud"
: Transmission speed (baud-rate), programmable from 1200
to 38400 baud. All the stations have to have the same transmission
speed.
"PACS"
: Programming access. If programmed as "LoCL" this
means that the instrument is only programmable from the keyboard,
if programmed as "LorE" it is programmable both from the
keyboards and serial line.
If an attempt is made to enter the programming from the keyboard
whilst a communication through the serial port is in progress the
instrument will visualise
"buSy"
to indicate the busy state.
4.8 - PARAMETERS CONFIGURATION BY “A01”
It is possible the transfer from and toward the instrument of the
functioning parameters through the device
A01
with 5 poles
connector.
This device A01 it’s mainly useable for the serial programming of
the instruments which need to have the same parameters
configuration or to keep a copy of the programming of an instrument
and allow its rapid retransmission.
The same device can connect the instrument via USB to a PC and
through the proper configuration software tools "TECNOLOGIC
UniversalConf”, it’s possible to configure the operating parameters.
To use the device A01 it’s necessary that the device or instrument
are being supplied.
For additional info, please have a look at the A01 instruction
manual.
