Fatek PID

i need to run my induction motor in closed loop.I am using PID function in winproladder. when i use it alone without any other function then it works fine. but when i combined it with other function then it stop working. if i choose any starting register SR then SR+1 refused to take any value. i have reviewed my code many times and i am stuck on that point don't know what to do.

What type of other function you had used with PID Function?