4.6.5 Display features:
The parameters down and full display scale, cut-off and ordinates (if input lin-
earised in segments) are to be considered in the magnitude of the programmed
physical scale. The setpoints, hysteresis, dO.dis and FO.dis for the analog
output can be programmed either in input magnitude or in displayed magnitude
(according to PARA).
For the
example 1
, with PARA1 «diSP» validated, a setpoint on the relay 1 (
SPI.I
)
with a value of
30.0
corresponds to a setpoint of 30.0 m3. If the display overstepps
30.0m3 (if the input exceeds 5,60 mA) the status of the relay 1 will change.
Position of the decimal point for the inputs other than
temperature inputs
Display resolution for the temperature inputs
0.1°
or
1°
linear input
square root extraction
√
of the measure brought back in % of the programmed
measure range
Example for a 4-20mA input: 12mA gives 0.707 (
√
0.5)
The function square root tends to amplify the background
noise of the input signal when getting near zero.
To avoid the ripples caused by this noise, simply
programme a cut-off value (in display points).
special linearisation
Display corresponding to the input down scale
(except temperature inputs)
Display corresponding to the input full scale
(except temperature inputs)
Only for process, resistance, potentiometer inputs, expressed
in display points.
−
If the display full scale > display down scale and if the display is
≤
than the cut off value then it will be held at the down scale.
−
If the display full scale < display down scale and if the display is
≥
than the cut off value then it will be held at the down scale.
p15
Point
rESOL.
d.diSP
F.diSP
Cut.vA
d.in
F.in
•
Response time
:
Integration indice of the digital filtering:
Programmable from 0 to 10; use in case of unsteady input signal.
To obtain the maximum response time add 240 ms.
Note: For the response time of the analog outpt, add 40ms to the values
given in the table.
For the relays: add the time delay programmed on the alarms.
Setting of the digits brightness
Lowest brightness
Strongest brightness
br.diG
1 1 1 1
4444
FiLt
Typical response
time at 90%
120 ms 400 ms 600 ms
FiLt
0
1
2
1 s
3
1.4 s
4
2 s
5
3 s
5 s
7.5 s
6
7
8
10 s
9
15 s
10
Funct
LinEA
root
Li.SPE
For a 4/20 mA signal from a level sensor on a tank, the following programming is
displayed:
POINT
=
_ _ _ . _
FUNCT = LinEA
d.in = 4.00
F.in = 20.00
d.diSP = 000.0
F.diSP =300.0
for:
4 mA from the sensor, display =
000.0
m3
12 mA from the sensor, display =
150.0 m3
20 mA from the sensor, display =
300.0 m3
