Thermocouples
5.3 Compensation for the reference junction temperature
Analog value processing
94
Function Manual, 06/2014, A5E03461439-AC
5.3.6
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 WRREC (SFB 53).
The structure of the data records is detailed in the device manual for each module.
Requirement
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)
Summary of Contents for SIMATIC ET 200AL
Page 2: ......
Page 143: ......
Page 218: ......
Page 250: ......
Page 296: ......
Page 337: ......
Page 365: ......
Page 392: ......
Page 419: ......
Page 451: ......
Page 483: ......
Page 597: ......
Page 648: ......
Page 702: ......
Page 739: ......
Page 781: ......
Page 804: ......
Page 828: ......
Page 853: ......
Page 880: ......
Page 906: ......
Page 996: ...Diagnostics ...
Page 1121: ......
Page 1565: ......