Using Scales; General About Using Scales; Creating Scales - ABB COM600 Station Automation Series User Manual

COM600 3.2
4.3.7.
4.3.7.1.
4.3.7.2.
44
COM600 Station Automation Series
User's Guide

Using scales

General about using scales

You may need to use scaling if a measurement value provided by the device is not as
such suitable for the applications, and you need to change the provided value to another.
With a scale you can convert one value to another by using a scaling algorithm. OPC
servers support two types of scales: Stepwise Linear and Look-up Table. The Stepwise
Linear scale multiplies the value to be converted with a scale factor and adds an offset
value to the result, and the Look-up Table scale uses a look-up table to find the required
value.
Before you can connect a scale to a data object, you need to
add and configure the scale in the Communication Engineering
Tool (CET). It is advisable to add and configure the scales
before adding and configuring any other objects.

Creating scales

To create scales:
1. Right-click Scale Definitions in the Communication Engineering Tool (CET), see
Figure 4.3.7.2-1.
2. Select New -> Scales.
3. Select the scale you need to add (a Look-up Table or Stepwise Linear).
4. The new scale appears in the Scale Definitions. Enter a unique name for the scale
by right-clicking it and selecting Rename. It can be configured and connected to a
data object.
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