Siemens SIMATIC S7-1500 Manual page 24

Parameters/address space
4.1 Measuring types and ranges
The diagram below shows the temperature profile and the corresponding switching points.
Figure 4-2
Measured value acquisition with PTC resistors
If faults occur (for example supply voltage L+ missing) that make it impossible to acquire
measured values with PTC resistors, the corresponding channels (IR x/IR x+1) report
overflow (7FFF
corresponding bit.
24
Temperature profile and the corresponding switching points
). If the value status (QI) is enabled, the value 0 = incorrect is output in the
H
Analog input module AI 8xU/I/RTD/TC ST (6ES7531-7KF00-0AB0)
Manual, 09/2016, A5E03484864-AD