Siemens SIMATIC ET 200AL, System Manual

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Parameters/address space
4.3 Explanation of the parameters
Analog input module AI 4xU/I/RTD 4xM12 (6ES7144-5KD00-0BA0)
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Equipment Manual, 08/2021, A5E32350124-AG
4.3 Explanation of the parameters
Temperature unit
You use this parameter to set the temperature unit with which you want to measure the
temperature.
Measurement type/measuring range channel n
You use this parameter to set the measurement type or the measuring range for acquiring
the measured values.
Note
Unused channels
"Deactivate" unused channels in the parameter assignment to improve the cycle time of the
module.
A deactivated channel always returns the value 7FFF
H
.
Temperature coefficient (for RTD, resistance thermometer)
The temperature coefficient depends on the chemical composition of the material. In Europe,
only one value is used per sensor type (default value).
The correction factor for the temperature coefficient (α value) specifies how much the
resistance of a certain material changes when the temperature is raised by 1 °C.
The further values facilitate sensor-specific setting of the temperature coefficient and
enhance accuracy.