gefran 2300 Manual De Uso página 19

G Display
5-digit display (-9999.... 9999). 12-bit resolution. Settable decimal
point. Fixed zero can be set on least significant digit. In normal
operation, the display shows the variable measured at input
(process variable). Switching between net and gross values from
keyboard. Display of gross value is indicated by flashing of units
decimal point.
Positive (-HI-) or negative (-LO-) off-scale signal. If "Peak" func-
tion is on, the display shows the peak value according to ("Peak
+" / "Peak -") configuration. Low (_Lo_ message) and high (_Hi_
message) off-scale indication.
Broken pressure probe and calibration error indication:
E_br: probe energizing interrupted
_Sbr: "+" wire broken or signal too high
L.sbr: "-" wire broken or signal too low
Er.CAL - calibration error
Display of local and remote setpoints.
Display of configuration and calibration messages/symbol/values.
Display of auxiliary input values.
H LED signal
LED signal (OUT1, OUT2) of energizing state of trip point relay
(LED on = relay energized). Signal flashes during display and/or
setting of trip point values.
Flashing signal of LEDs OUT1 and OUT2 respectively, with REM
LED during display of auxiliary inputs.
I LED signal
Peak value display signal (PEAK).
Calibration active signal (CAL).
Serial communication or remote setpoints active signal (REM).
MD8 expansion enabled or energizing of third alarm relay signal
(EXP).
J Self-sticking plate
Plate to identify unit of measurement (engineering).
CONTROLS
A "F" Function button
Gives access to trip point functions (Out1, Out2, Out3/Out1-
Out10 if MD8 expansion is present) for reading and/or changing
of values. Gives access to display of auxiliary analog inputs
(remotes 1 and 2). If button F is not pushed to confirm a setpoint
change, it will be saved automatically after 10 seconds. Use
button F to confirm the set value. Keep button F pressed to
access the various configuration and calibration phases.
B / C Raise and Lower Buttons
Let you increase or decrease displayed value for setting data
orselecting an option. During calibration of repetition output W the
Raise/Lower buttons let you change the minimum and maximum
value. Increase/decrease speed is proportional to the time the
button is kept pressed. The procedure is not cyclical: when the
maximum (minimum) for the field is reached, the function stops
even if the button is pressed. During configuration, the
Raise/Lower buttons block mnemonic/value alternation to allow
change of the displayed parameter.
D Special function button "*"
Button available for special functions. Configurable function
(phase CFG2 parameter button 3):
- tare zero
- automatic calibration control for pressure probe (♦)
- reset trip point memory
- reset peak memory (♦♦)
- enable remote set 1 and/or 2
- display HOLD function
- display HOLD of sampled input value
- NET/GROSS selection
- MAIN INPUT/INPUTS SUM selection
3 • DESCRIPTION OF FACEPLATE
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J
F
E "CAL/RST" button
Configurable function (see CFG2 butt.2 parameter):
- tare zero
- automatic calibration control for pressure probes (♦)
- reset trip memory
- reset peak memory (♦♦)
- enable remote set 1 and/or 2
- display HOLD function
- display HOLD of sampled input value
(♦) The calibration control function provides a known calibration
signal from the unstressed transducer. In this condition, alarm
relay status and the value of the analog input repetition signal are
unchanged. The calibration function is signaled by lighting of
the LED on the front panel (CAL)
(♦♦) When the peak memory reset function is enabled, the
button updates the peak memory to the current value of the input
signal. These functions are also available by means of
configurable external contacts (see "Electrical connections" and
"Configuration CFG2: d.i.F.1 and d.i.F.2).
F "PEAK" button
Pressing the Peak button displays the peak value, i.e., the data
shown on display corresponds (depending on the type of peak
selected) to (see CGF2 butt.1 parameter):
- "peak +" maximum value reached by variable
- "peak -" minimum value reached by variable
- "peak - peak" difference between "peak +" and "peak -"
The PEAK LED on the front panel indicates when this function is
on. When the PEAK button is pressed again, the peak function
deactivates and the PEAK LED turns off. The instrument again
displays the process variable. The peak memory remains active
internally and can be displayed at any time.
TRIP POINT CHARACTERISTICS
Main input sampling time is 2msec with no remote setpoints, and
4msec with at least one remote setpoint. The maximum trip point
delay for OUT1 and OUT2 is the sampling period of the main
input.
The maximum delay time for OUT3 is 8msec.
The maximum trip point delay for OUT3...10 on the MD8 expan-
sion is 8msec.
The minimum time for controls from digital inputs (IN1 and IN2) is
8 msec.
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