The Interface Solution Experts
15
FDY
PC-Programmable Frequency
Transmitter and Display
Figure 11.
Custom Curve Parameters Tab
Programming the Custom Curve
Parameters
The
Custom Curve
section of the confi guration
software allows you to setup your own custom curve
table with up to 128 points. In effect, this allows you
to tell the transmitter what it should output when it
receives a certain input. Use the
Custom Curve
tab for
customizing the display’s engineering units, reversing
the output, signal limiting and creating custom curves.
Follow these directions to setup your custom curve
table:
1. Check the
Enabled
box in the
Custom Curve
section. Click the
Set
button and wait for the
transmitter to fi nish downloading the information.
2. Input the
Lower Range
and the
Upper Range
into the appropriate boxes. The point you enter in
the
Lower Range
will become the zero point of the
transmitter, and the transmitter will send out a 4mA
signal (or the selected output signal, if the zero output
is set at a value other than 4mA) when this point is
reached. Likewise, the point you enter into the
Upper
Range
will cause the transmitter to output 20mA (or full
output signal, if different) when that point is reached.
3. Enter the desired engineering unit into the
Display EGU label
box. This will control what type of
engineering unit (up to 5 alphanumeric characters,
excluding symbols) is displayed by the Confi guration
Software and on the FDY’s display.
4. Click
Set
to download all of the information to the
transmitter.
NOTE:
“Read” will upload the information from the transmitter
to the confi guration program. This can be used to
take the last table that you have downloaded to the
transmitter and enter it into the PC Confi guration
Software.
5. Click
Edit Table
to begin creating your own custom
curve table (see next page for instructions).
IMPORTANT:
Once you enable the custom curve, you must edit the
table in order for your transmitter to work properly.
