5.24.3 Measuring methods and measuring ranges of the SM 431; AI 8 x RTD x 16 Bit
Measuring methods
You can set the temperature measurement as the measuring method for the input channels.
Unused channels
For unused channels, set the "measuring method" parameter to "deactivated". This reduces
the module's cycle time.
Measuring ranges
Set the measuring ranges by means of the "Measuring range" parameter in STEP 7.
Table 5-70 Measuring ranges of the SM 431; AI 8 x RTD x 16 Bit
Selected measuring method Measuring range Description
RTD-3L: Thermal resistance
(linear, 3-conductor connec‐
tion)
(temperature measurement)
Pt 100 Standard
Pt 200 Standard
Pt 500 Standard
Pt 1000 Standard
Ni 100 Standard
Ni 1000 Standard
The digitized analog values are listed in the
section "Analog Values of the Analog Input
Channels" in the temperature range.
RTD-4L: Thermal resistance
(linear, 4-conductor connec‐
tion)
(temperature measurement)
Default
The default settings of the module in STEP 7 are "Thermal resistor (linear, 3-conductor
connection)" for the measuring method and "Pt 100 Standard" for the measuring range. You
can use this measuring method with this measuring range without configuring the SM 431; AI
8 x RTD x 16 Bit with STEP 7.
See also
Representation of analog values of analog input channels (Page 169)
Analog modules
5.24 Analog input module SM 431; AI 8 x RTD x 16 Bit (6ES7431-7KF10-0AB0)
S7-400 Automation System Module Data
302 Reference Manual, Ausgabe 11/2016, A5E00850736-08
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