Azbil SLPC1F, User Manual

Page: 48 / 86

5-2
Chapter 5. Adjusting PID Values
„
Precautions
Pay attention to the following when using the PID Simulator.
• Depending on the characteristics of the device, the PID Simulator’s result and the
actual control result may not match.
• The PID Simulator cannot be used for devices whose characteristics cannot
be expressed using mathematical models. This includes, for example, a device
with very strong nonlinear characteristics * or a device that has characteristics
that cannot be expressed using mathematical models due to some special
implementation.
• The PID Simulator does not support SP groups, PID groups, multi-ramping, and
SP step operations.
• The PID Simulator does not support cascade control and heat/cool operation.
* In other words, the characteristics significantly change depending on the process
variables or manipulated variables. A typical example is the characteristics of pH
control near the neutral point.
„ Screen explanations
z PID Simulator screen (at start-up)
When starting the PID Simulator, the “Welcome to PID Simulator” dialog box
appears and prompts you to select the startup method.
z
Make a model from a data file (*.spd3)
The PID Simulator reads data from a data file and starts the Modeling Wizard.
This is the same as selecting
[File]
→
[Make Model from Data File]
from the menu.