ABB RELION REX640 Technical Manual page 177

1MRS759142 F
Value unit
Degrees Celsius
Ohm
Hysteresis
Example
Ampere input –20...20 mA is scaled to tap position information 0...36. The
actual hysteresis for limit supervision is 0.18.
Value maximum
Val high high limit
Val low low limit
Value minimum
Figure 72: Limit value supervision
3.15.4.3 Deadband supervision
This is the same functionality as in measurement functions.
3.15.4.4 Output scaling
The mA outputs are scaled linearly by constructing linear scaling curves for each
output.
Value maximum and Value minimum affect the scaled output range. The range of
the scaled input is defined with the settings
Depending on setting
1
When the input is scaled to the "Dimensionless" output, the additional hysteresis is added the
initial table value.
REX640
Technical Manual
Value maximum Value minimum
⋅
Input maximum Input
Y
Val high limit
X_RANGE=0
Val low limit
X_RANGE=2
X_RANGE=4
Num of knee points , the output can be scaled with up to five
Hysteresis
0.5°C
2 Ω
−
m m inimum
−
Out of Range
X_RANGE = 3
X_RANGE= 1
X_RANGE=0
Input minimum and Input maximum .
Basic functions
Hysteresis
Value
Reported
(Equation 7)
t
177