Analog Modules
5-126 S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
5.23.1 Commissioning the SM 431; AI 8 RTD 16 Bit

You set the mode of operation of the SM 431; AI 8 RTD 16 Bit in STEP 7.

Parameters
You will find a description of the general procedure for assigning parameters to
analog modules in Section 5.7.
An overview of the parameters that you can set and their default settings are
shown in the table below.
Table 5-71 Parameters of the SM 431; AI 8 RTD 16 Bit
Parameter Value Range Default2) Parameter
Type Scope
Enable
Diagnostic interrupt1)
Hardware interrupt1) Yes/no
Yes/no No
No Dynamic Module
Destination CPU for
interrupt 1 to 4 Static Module
Trigger for hardware
interrupt3)
Dynamic
Channel
High limit
Low limit
32767 to – 32768
– 32768 to 32767
Dynamic Channel
Diagnostics
Wire break
Underflow
Overflow
Yes/no
Yes/no
Yes/no
No
No
No
Measurement
Measuring type Disabled
RTD-4L Thermal resistor
(linear, four-conductor
terminal)
RTD-3L Thermal resistor
(linear, three-conductor
terminal)
RTD-3L
Static Channel
Measuring range Refer to Section 5.23.2 for the
measuring ranges of the input
channels that you can set.
Pt 100
standard
Temperature unit Degrees Celsius; degrees
Fahrenheit Degrees
Celsius Static Module
Temperature
coefficient for
temperature
measurement with
thermal resistor (RTD)
For platinium (Pt)
0.00385 / °C
0.003916 / °C
0.003902 / °C
0.003920 / °C
For nickel (Ni)
0.00618 / °C
0.00672 / °C
0.00385
Static Channel