Parameters; Parameter Usage And Selection - YOKOGAWA Dpharp vigilantplant EJA Series User Manual

2.3 Parameters

2.3.1 Parameter Usage and Selection

Before describing the procedure for setting parameters,
we present the following table showing how the
prameters are used and in what case.
Table 2.3.1 Parameter Usage and Selection
Item
Memory
Transmitter Engineering unit
Range
Output mode
Damping time constant
Output signal low cut
mode
Bi-direction flow
measurement mode
H O unit selection
2
Unit for displayed
temperature
Unit for displayed static
pressure
Integral indicator display
Display
mode
Integral indicator scale
Burst mode
HART output
Multi-drop mode
Monitoring
Test output
Maintenance
Self-diagnostics
Output when CPU error
has occurred
External volume
protect/permit
Software Write Protect
Zeroing
Adjustment
Sensor trim
Analog output trim
HART Communicator
Tag Tag number, Up to 8 characters
Up to 16 characters
Descriptor
Up to 32 characters
Message
xx/yy/zz
Date
inH O, inHG, ftH
Unit
2
Set the calibration range by the keypad
LRV/URV
Range for 4 to 20 mA DC signal is set with actual input applied.
Apply values
Sets mode for output signal to "linear mode" (proportional to input differential pressure)
Xfer fnctn
or to "Square root mode" (proportional to flow).
Adjust the output response speed for 4 to 20 mA DC. 0.2, 0.5, 1, 1.5, 2, 4, 6, 8, 16, 32
Damp
(sec)
Used mainly to stabilize output near 0 if output signal is the square root mode. Two
Low cut
mode are available: forcing output to 0% for input below a specific value, or changing to
proportional output for input below a specific value.
Cut mode Linear or Zero
Used to measure bi-directional flows.
Bi-dire mode
H O Unit select at 4 C (39.2 F)/at 20 C (68 F)
2
Snsr temp unit
Sets a unit for temperature displayed on the model 275.
Static pres unit
Sets a unit for static pressure displayed on the model 275.
Display fnctn Sets mode for integral indicator to "linear mode" (proportional to input differential
pressure) or to "Square root mode" (proportional to flow).
Set the following 5 types of integral indicator scale ranges and unit: "% scale indicator",
Display mode
"use set scale indicator", "alternate indication of user set scale and % scale", "input
pressure display" and "alternate indication of input pressure and % scale.
Engr disp range
Engr unit/Engr disp LRV/Engr disp URV/Engr disp point.
Burst option
Selection of the data to be sent continuously (Pres/% rnge/A01 out).
Burst mode
ON/OFF switching of burst mode.
Poll addr
Setting the polling address (1 to 15).
Auto poll
ON/OFF switching of multi-drop mode.
Pres
Pressure variable
% rnge
% output variable
A01 out
4 to 20 mA output variable
Snsr temp
Sensor temperature
Static pres
Static pressure
Engr display
Displays output as on an LCD. settable in the engr disp range.
Loop test
Used for loop checks. Output can be set freely from –5% to 110% in 1% step.
Self test
Check using the self-test command. If an error is detected, the corresponding message
is displayed.
Status
Display of the result of self-test, calibration of transmitter.
A01 Alarm typ
Display the status of 4 to 20 mA DC output when a failure
Ext SW mode
Display/set the external volume protect/permit for LRV (URV) setting.
Write protect
Displays the permit/protect status of setting changes depending on communications.
Write protect status is released for 10 minutes when the password is entered.
Enable write
Setting a new password.
New password
Set the current input value to 0 kPa.
Zero trim
Adjust only measured pressure variable.
Lower/Upper sensor trim
Adjust the output value at the points of 4 mA and 20 mA.
D/A trim, Scaled D/A trim
2. HART COMMUNICATOR OPERATION
NOTE
Do not turn off the transmitter as soon as HART
Communicator settings (sending) have been
made. If the transmitter is turned of less than 30
seconds after parameters have been set, the set
data will not be stored and the terminal returns
to previous settings.
Description
O, mmH O, mmHG, psi, bar, mbar, g/cm
2 2
2-5
2 2
, kg/cm , Pa, kPa, MPa, torr, atm
P.2-10
P.2-19
P.2-12
P.2-10
P.2-11
P.2-10
P.2-16
P.2-12
P.2-19
P.2-17
P.2-13
P.2-14
T0201.EPS
IM 01C22T01-01E
Page
P.2-7
P.2-8
P.2-9
—
—
P.1-2