Hi wonder if someone can explain the following.
I'm using an S7-1220 1214c cpu with analog input and analog output cards.
I need to control the flow going into a plant at a set rate using flowmeter and control valve.
When i did my scaling from RAW values to Eng values, my PID does not respond as it should.
Do I have to write RAW values into the PID and if so, how do I revert back from scaled values to RAW values.
I'm using an S7-1220 1214c cpu with analog input and analog output cards.
I need to control the flow going into a plant at a set rate using flowmeter and control valve.
When i did my scaling from RAW values to Eng values, my PID does not respond as it should.
Do I have to write RAW values into the PID and if so, how do I revert back from scaled values to RAW values.
