Thermocouples
5.3 Compensation for the reference junction temperature
Analog value processing
86 Function Manual, 06/2014, A5E03461439-AC
Compensation with reference channel of the module
Function principle
With this type of compensation, the reference junction temperature is determined using an
external thermal resistor (RTD). Certain modules provide an internal reference channel.
Configuration steps:
1. Open the project in STEP 7.
2. In the device view, select the required analog module and the corresponding channel.
3. Select the "General" tab in the Inspector window of the selected module.
4. Select the "Inputs/Measuring" area.
5. Select the "Thermocouple" value as "Measurement type".
6. As "Reference junction", select the value "Reference channel of the module"".
Figure 5-4 Reference channel of the module
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