Capture of variable in time
dear friends, I have a weight signal in the 800x system which varies depending on the time in each work cycle in a filter that lasts 60 minutes and I want to capture this signal at minute 20 (value1), which is frozen said signal in a subtraction block, then take the same signal in minute 50 (value2) which is obviously already different, then subtract those two values (value1- value2) and store them in trending and then export, what I need is to store that weight difference, could you give me an idea of how to capture that signal.
Voted best answer
Option1: You can use Timer Function, when the elapsed time is reached 20mins & 50mins, you can move the value to Var1 & Var2 resp. You can use TP and/or RS Flipflop function to move the value only once.
Option2: You can use log and report configurations. For example: Every 10mins you can save the value in log. The same can be used in reports to find the difference.