Convert ohms value from PT-100 to current or voltage

Depending on TC/RTD module used, you get the temperature with 1 or 2 implied decimal places in the tag associated with the IW# address.

Example:

PT100 #1 hardware configuration:

■ 1 decimal place (default)
■ ºC
■ IW96

Actual sensed temperature:
■ 123.4 (ºC) @ IW96, IW96 will have 1234 when monitored or in a watch table.

LAD: To obtain actual value, Convert to real and divide by10.0.  Do not divide by 10 first, or you might (will) lose the decimal accuracy (because of integer math).

mahima_attri154

Hey, I have the module 1234 how to use that for the conversion?

You are hoping to use a normal analog card to read the PT-100. This is not recommended for industrial applications. 

You can consider getting a RTD to analog converter, if you have to. For an academical project you can consider building the converter yourself. Web search "RTD to analog converter" or something like it.

For theoretical background, have a look at: https://en.wikipedia.org/wiki/Resistance_thermometer. Especially focus on the one where a 3 wire device is mentioned.