Azbil SLPC1F, User Manual

Page: 67 / 86

5-21
Chapter 5. Adjusting PID Values
„
Overview
To create a mathematical model, data on the manipulated variable (MV) and
process variable (PV) sampled when the controller is performing operations such as
the following is necessary:
• Step response to a change of the set point
• Step response to a change of the manipulated variable (MV)
• Auto-tuning
This section describes the data sampling procedure during step response to a
change in the set point. The data sampling procedure is as follows:
Step 1: Choose a default process variable (PV) and set point
↓
Step 2: Stabilize the process variable (PV) and manipulated variable (MV)
↓
Step 3: Start data sampling
↓
Step 4: Start step response
↓
Step 5: End data sampling
↓
Step 6: Save the sampled data
For data sampling, the Numeric Monitor and Trend Monitor of the SLP-C1F are
used. Chapter 4. Monitoring (on the use of the Numeric and Trend Monitors)
Handling Precautions
•
Perform data collection carefully, following the provided procedure. A control
result matching the simulation result may not be obtained if data sampling is
not performed correctly.
5 - 3 Data Sampling Method