Operation Principle; Limit Module - Hitachi Relion 650 Series Technical Manual

1MRK 511 557-UEN Rev. A
Table 62: ANSCAL Group settings (basic)
Name Values (Range)
Operation
10.1.6

Operation principle

Analog scaling ANSCAL function transforms an input signal, for example, from a monitoring function
or input interface, either through linear or non-linear scaling or interpolation between known relational
values for further use.
The overall functionality is defined in the logic diagram as shown in
the input value, whenever the input value exceeds the set limits. The chart function and equation
function scale the output value based on either linear interpolation and constant extrapolation or as a
function of the input based on the constants declared. Use FnType setting to choose between "Chart"
mode and "Equation" mode.
BLOCK
INPSENSTS
INPUT
IEC12000031 V2 EN-US
Figure 45:
10.1.6.1

Limit module

The limit module limits the input value to the range between the low limit and the high limit values
specified by the settings LowLimit and HighLimit.
If the input value falls outside the range spanned by LowLimit and HighLimit:
Technical Manual
Unit
Off -
On
FnType
NOT
NOT
Limit
Module
INPUT
CurvePoints
X1
LowLimit
X2
HighLimit
X3
LimitScaleVal
X4
X5
X6
X7
X8
Y1
Y2
Y3
Y4
Y5
Y6
Y7
Y8
a
b
c
d
e
f
m
n
Functional overview of ANSCAL
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Step Default
- On
ANSCAL
LimitScaleVal = DefValue
AND AND
NOT
ANSCAL
OUTPUT
BLKFUNC
200
150
100
50
0
0
20 40 60 80 100
INPUT
NOT
AND
OUTPUT
   
m n f . x
y a . x b . x c d . e
Description
Operation Mode Off / On
GUID-D7923CEE-68D3-4567-8672-7DB82CC7AC71 v2
Figure 45. The limit module limits
OR
ALARM
AND
NOT
BLOCK
DefValue OUTPUT
T
F
OR
AND WARNING
BLOCK
NOT
SENSTSOUT
BLOCK AND
NOT
IEC12000031_2_en.vsd
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Section 10
General calculation
101