- The PID controller can be tuned without using the readings log. Also if the correct or close parameters are known for the plant no tuning is necessary.
- The readings log screen can chart the last 100 readings while still collecting new readings.
- Start a recording session in 'USC Config 106' by selecting 'File' > 'Open/New' > 'New Readings Log'
- On the store readings screen adjust the 'Record every' setting
so that the expected response of the plant can be viewed in 100
readings. I selected 400mS so that a plot of the last 100 readings
will cover the last 40 seconds. Leave on continuous loop and press
record.
- Press record replace.
- If attempting to tune a very slow system with a response oscillation of an hour or more it may be more practical to record more readings and set to stop on maximum number of records.
Run the plant or process and tune PID values.