Controller Tuning 101
COMPANION PID TUNING SOFTWARE FOR THE BOOKLET
$18, Includes Shipping and Handling (if ordered with the booklet)
Software Description and Features
The controller and process are shown as a signal flow diagram, not as graphical representations of a controller and process. The results are plotted as fast as the computer can calculate them (the blink of an eye with a fast computer). They are presented in a plot which does not move with time, and plots for up to four sets of test conditions may be shown simultaneously and printed. A Help menu describes exercises to illustrate the key points about control which are described in the booklet. The simulation will be for linear control except for valve nonlinearities, with the following parameters settable:
- Set Point
- Gain or Proportional Band
- Integral (Reset) Time or Integral (Reset) Rate
- Derivative Time
- Filter Time
- Process Gain
- Dead Time
- Two First Order Lags, or an Underdamped Quadratic
- Integration
- Set Point, in Automatic
- Load Change, in Automatic
- Controller Output, in Manual
- Interacting, or Noninteracting
- Derivative on Process or Derivative on Error
- Cascade Control
- Dead Band
- Velocity Limiting
Upgrade Information
Version 1.0 (the first release) had some graphical inconsistencies. These have been fixed. For Version 1.1 the options to change the timescale and the number of calculation steps were added. Version 1.2 has the ability to add valve nonlinearities of Dead Band and Velocity Limiting. Version 2.0 added the option for cascade control and Version 2.1 (Jan., 2000) cleaned up some issues with it. Version 3.0 was issued 1 July 2000 and is simply a 32-bit issue of Version 2.1. About four customers out of about 800 had trouble installing the 16-bit version on 32-bit computers. Version 3.1 was introduced in November 2005. It allows toggling of the yellow background color to white, prints the response curves in dashes to facilitate separation on monochrome printers, and does not require the default printer to be set before the program is started. Previous customers may e-mail me at jastclair001@gmail.comt for a free upgrade.
Demonstration Software
The demonstration software (1.7 MB) fits on WindowsTM 95 and higher. It shows everything, including the Help file, and allows you to print results. It does not allow you to change much. Only the following parameters are enabled: Set point, Controller Gain, Load Change and Manual Output. There is a README.TXT file available after you unzip it but before you install it. This process will allow you to decide which folder/directory to put it in. Do not put it where the unzipped files are. If you subsequently want the full-featured version there are two ways to get it:
1. I can e-mail you the upgraded file.
2. I can postal-mail you a CD.
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