Parameters/address space
4.4 Scalable measuring range
Analog input module AI 4xRTD/TC 2-/3-/4-wire HF (6ES7134-6JD00-0CA1)
28 Manual, 02/2014, A5E03573289-AD
4.4 Scalable measuring range
Introduction
The scalable measuring range is available for the temperature measuring ranges of thermal
resistors (RTD) standard and thermocouples. The measuring ranges for voltage, resistor and
thermal resistor climatic are not supported.
The scalable measuring range is valid for the following ranges:
● Nominal range
● Underrange
● Overrange
Function
The scalable measuring range is a limited section of a measuring range supported by the
module.
It allows you to increase the resolution for a configurable section.
● The "Measuring range resolution" parameter determines the resolution to 2 or 3 decimal
places.
● The "Measuring range center" parameter determines the temperature over which the
scalable measuring range is symmetrically spanned.
Value ranges
Table 4- 8 Value ranges
Scalable measuring range Measuring range resolution Values hex.
2 decimal places 3 decimal places
Overflow >325.11 >32.511 7FFF
H
High limit 325.11 32.511 7EFF
H
Measuring range center 0 0 0
H
Low limit -325.12 -32.512 8100
H
Underflow <-325.12 <-32.512 8000
H
To obtain an absolute temperature, the measuring range center in the application program
(as offset) must be calculated with the value of the user data of the scalable measuring
range.
The measuring range center is always output in the user data as the value "0". The user data
are correspondingly mapped to the bipolar input ranges in S7 format. Underflow / overflow is
also formed in accordance with the limits of S7.
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