Please provide me links where i can get info abt controlling the opening of a tanks output valve based on temperature of the tank using plc.

 

Here is an excellent start:
http://www.control.com/postings_tool/displayFullTextSearch?body=pid+tuning

 

One way to do it is to use t/c input card.
then use a compare or limit function to open the valves at the set value.
hope this helps
calvin smith
[email protected]