Scaling Of Measured Values - Siemens SIMATIC ET 200SP Manual

Parameters/address space

5.5 Scaling of measured values

5.5 Scaling of measured values
Function
With measured value scaling, the user data of the module is displayed as REAL (32-bit floating
point) instead of in S7 format.
The representation of the measuring range is defined by the following parameters:
• The "Scaled high nominal range limit" parameter sets the desired display value (in REAL)
for the high nominal range limit of the measuring range.
• The "Scaled low nominal range limit" parameter sets the desired display value (in REAL) for
the low nominal range limit of the measuring range.
Note
With measured value scaling, the substitute value is minus infinity for underflow
(FF800000
Note
Effects of inversion
It is possible to set the "Scaled high nominal range limit" parameter lower than the "Scaled
low nominal range limit" parameter, whereby the representation of the measuring range will
be inverted compared to the terminal value (V, mA).
Overflow/underflow and hardware interrupts are always based on representation in REAL. A
terminal value of > 11.76 V triggered an underflow for an inverted measured value scaling.
Hardware interrupts react similarly.
Note
When the Parameter "Scaled high nominal range limit" and "Scaled low nominal range limit"
parameters are too close together, resolution may be lost, which means it may no longer be
possible to show every value.
The measured value scaling can be combined with the measuring range adjustment. In this
case, the measuring range is adjusted first and then the representation of the measuring
range is scaled.
34
) and plus infinity for overflow (7F800000
H
).
H
Analog input module AI 2xU/I 2-/4-wire HF (6ES7134-6HB00-0CA1)
Equipment Manual, 05/21, A5E51055079-AA