First, from the Analog extension configuration screen, select PT100 for the Input IJ:
Then, a GAIN function block is needed to apply the following formula :
T° = (( IJ x 150 ) / 1023) - 25
because the scale is:
-25°C => IJ=0
+125°C => IJ=1023
In consequence, the GAIN function has to be configured like below:
In Monitoring, we can see the read temperature is 24°C when the input value is 337:
Wiring:
- 1rst red wire connected to IJ
- 2nd red wire connected to Pt
- White wire connected to 0v
Publié pour:Schneider Electric Belgium
