Can you even upload your program?

It is better if you have the program directly for error checking.

In addition, I have the following questions:

Which logo do you have? Please specify the exact order number.
Do you have a AM2 RTD module? If yes, please specify the exact order number.

In attachment an example, how to switch on/off the heater.

Since your temperature signal as 0-10V (measuring range 0-100 °C) is in the logo, the analog threshold Trigger following is configured:
Gain: 1.00
Offset: 0
Mininmum: 0
Maximum: 1000
Decimal places for the message text: 1
Thus a temperature of 0.0 -100.0 °C appears on the display.

You convert with the Datexel DAT2165 the PT100 already in a fixed temperature range, you may not choose the PT100, but as sensor 0-10V in amplyfing.
If your temperature displayed always shows the minimum, this can have various causes:
- Your logo basic module has no analog input.
- You have not set the signal to the correct input terminal.
- You have chosen the wrong analog input in the program.
- The power supply of Datexel DAT2165 and the logo is not the same.