scaling of the input range, the Value unit parameter must be set to “Dimensionless”,
where the input range can be scaled linearly with the parameters Input minimum and
Input maximum to Value minimum and Value maximum.
6.1.4.2 Linear input scaling
Each channel can be scaled linearly when the Input Mode parameter is set to “0…20
mA” and the Value Unit parameter is set to “Dimensionless”.
The scaling is defined by a curve consisting of two points, where the y-axis (Input
minimum and Input maximum) defines the input range and the x-axis (Value minimum
and Value maximum) is the range of the scaled value of the input.
The input scaling can be bypassed by selecting Value unit to be "mA"
when Input mode is "0...20 mA".
Example of linear scaling
The mA input is used as tap changer position information. The sensor information is
from 4...20 mA, which is equivalent to the tap changer position from -36...+36
respectively.
GUID-2605859F-0877-4477-A3AA-98BC1F8219C6 V1 EN
Figure 36: Example of linear scaling
6.1.4.3 Measurement chain supervision
Each channel is monitored continuously for any break of circuitry in any enabled
channel. If the RTD input cable is damaged or broken, the channel value in GOOSE
Section 6 1MRS757488 H
Commissioning
64 RIO600
Installation and Commissioning Manual
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