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Quick Start Guide
19
December 2014
Profile points 1 to 10 (P030 to P039)
These parameters are used to define an irregular-shaped profile for calculating the
process value (PV) from a live level reading.
See Figure n on page 18 for an example of
how these parameters are used.
Field Communicator or AMS
To view or change the profile point:
1. From the Home screen, select
2: Configure.
2. Select
2: Manual Setup.
3. Select
3: Profiling.
4. Select
6: Plot Non-Linear Profile Points.
5. Select a profile point
e.g.
1: Profile Point1 P030.
6. Input a new value, and then select “
ENTER” to save it.
7. Press “
SEND” to update the transmitter.
Note
The profile point parameters are only accessible on a Field Communicator
if they are required for a selected profile. The points can be changed only if the
“Special Plotted” profile has been selected.
Rosemount 3490 Series Control Unit
To view or change the profile point:
1. From the Main Menu screen, select
SETUP.
2. Select the transmitter (e.g. “
Tx1: 3107”).
3. Select
DUTY, and then NLP CURVE.
4. Select a profile point e.g. “
Profile Pt. 1”.
5. Follow the on-screen instructions to edit and save the new setting.
(Press the
Enter ( ) key if prompted to change the mode to “off-line”).
6. Select “
Quit” to exit to the previous menu.
Procedure for P011=“Special Plot”
1. Draw the graph of Process Value (PV) versus Liquid Height, and note the maximum
points (Figuren).
2. Enter the maximum volume or flow into
PV Scale Factor (P013) (page 16).
3. Enter the maximum liquid height into Profile Height (P014) (page 17).
4. Use parameters
Profile Point 1 to 10 (P030 to P039) (page 19) to enter the Y-axis
percentages that relate to the X-axis fixed percentages and produce the curve.
In the example, 60% of the maximum height (on the X-axis) relates to a percentage of
the maximum PV on the Y-axis. The related percentage on the Y-axis, say 55%, is
entered into parameter
Profile Point 6 (P035).
The transmitter interpolates linearly between the plotted points to give an accurate
curve fit, which will determine the output process value (PV) from the live level
(height) measurement.
Profile Point1 P030
10.000%
10.000%
ESC
DEL ENTER
HELP
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FN
(Field Communicator screen)
Profile Pt. 1
10.000%
Esc=Quit =Edit
(Rosemount 3491 screen)