Moxa IOLOGIK W5340-T Manual de usuario Pagina 46

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ioLogik Cellular Micro RTU Controller Utility: ioAdmin
3-15
Users can disable the unused AI channel by un-checking the Enable checkbox to increase the sampling rate.
Enabling the Auto Scaling function will linearly convert the actual current or voltage value into other user
defined units, such as percentage or ppm (parts per million)
Two scaling methods are available; the slope formula method, and the
slope-intercept method:
Auto Scaling with the point-slope formula can help to eliminate high end and low end extremes. For
example, if 17 mA represents the highest allowable temperature, then it is not necessary to allow higher
temperature values, and you can cut off values beyond 17 mA and convert it to a proprietary danger level, such
as Level 5.
Auto Scaling by slope-intercept formula provides linear conversion with one ratio (M) and offset (D).
Offset can be an initial value of field device. Ratio can help enlarge or reduce the scale by specifying a
proportion. It is also easy to modify the values in the database if we need to use new ratio and offset values in
the future.
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