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9 Configuration – in setup program only
9.11
Customized linearization
You can use the customer-specific linearization to create a customized linearization characteristic line
for analog inputs. This characteristic line is used for all analog inputs for which the corresponding linear-
ization has been selected in the configuration.
Customer-specific linearization can only be programmed with the setup program. Two procedures are
available for this (type of linearization): formulas or grid values (value pairs).
In the case of RTD temperature probes, linearization can additionally be performed using the alpha, be-
ta, and gamma value in combination with the basic value (R0) and the measuring range start/end.
Up to four linearization tables can be created and used simultaneously for different analog inputs.
NOTE!
It is possible to create different characteristic lines with grid values and formulas. The characteristic line
that matches the formula is authoritative for use in the module, however. If the grid values and formula
are not compatible when you press "OK" to exit the dialog, a warning is output. You can then delete the
grid points or recalculate the formula on the basis of the grid values.
Signal flow
(1)
(1)
Measured value
(2)
Monitoring of measured values for standard
signals (limits as per NAMUR)
(3)
Linearization (grid points/formula)
Grid points: Monitoring of the definition
range (measured values)
Formula: Monitoring of the value range (lin-
earized values) with regard to the measur-
ing range (configuration parameter:
Measuring range start, Measuring range
end)
226
y
>>>>
<<<<
(2)
+
x
(3)
(4)
(4)
Offset (normalized)
(5)
Monitoring of linearized values with regard
to scaling (configuration parameter: Scaling
start, Scaling end)
(6)
Linearized value
>>>>
<<<<
(6)
(5)
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