LX Series Unit Ventilator Controller User's Guide
15
The LX-UVL wizard in FX Workbench provides some automatic conversion
between SI and Imperial units. However, these are not ideal conversions because a
whole number in one system becomes a long decimal fraction in the other. For
example, 72°F is approximately equal to 22.22222°C.
The values created by converting Imperial to SI or SI to Imperial are subject to
rounding errors. If you enter an Imperial value into a L
ON
W
ORKS
SNVT by using
the LX-UVL Controller configuration wizard, the value is converted after it is
entered, then rounded and written to the SNVT. When you want to monitor the
SNVT, the value must be read from the SNVT, converted, and rounded again
before it is displayed. Due to the two conversions and two rounding operations, the
value may differ slightly from what you originally entered (Figure 4).
The same process and resulting rounding error applies to Standard Configuration
Property Types (SCPTs).
Instructions for changing or modifying the units of measure used on your computer
are provided in the
Selecting a Measurement System or Selecting a Language
section.
Language Selection
The following may require you to change your language settings:
•
You changed your regional settings by selecting a different region in the
Regional and Language Options dialog box.
•
You are working on a site that is in a linguistic region other than your own.
•
You are dissatisfied with the language displayed on program menus and dialog
boxes.
Figure 4: Writing and Reading Data in Imperial Units in the
L
ON
W
ORKS
Network
Value is written in
Imperial Units.
Value is translated
to SI units.
Value is rounded.
Value is read
from SNVT.
Value is translated
to SI units.
Value is rounded.
Data is displayed
for monitoring in
Imperial Units.
Units
Value is stored
in SNVT.
