Thermocouples
5.3 Compensation for the reference junction temperature
Analog value processing
94 Function Manual, 06/2014, A5E03461439-AC
Compensation by means of dynamic reference temperature
Function principle
This compensation type allows you to handle the reference junction temperature for
temperature compensation in the user program. You can derive the temperature value from
any other module of the station. The reference junction temperature is transferred via data
records using the instruction
(SFB 53).
The structure of the data records is detailed in the device manual for each module.
STEP 7 project with the following contents:
● User program with WRREC (SFB 53) instruction for transferring the data records with
reference temperature
● Analog module for acquisition of the process temperature using thermocouple (TC)
● Analog module for measuring the process temperature using thermal resistor (RTD)
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