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Press Releases

News Releases

1999 & Earlier




Multi-Variable Loop Analysis Software (November 1999)

ExperTune has released a suite of multi-variable tools to work with multi-variable, interacting loops, feedforward, and cascade loops.

Unique to ExperTune, the Relative Response Time is a relative indicator of the speed of the control loop. The smaller the relative response, the faster the loop. The higher the relative response value, the slower the loop. Use it to compare and adjust loop responses to reduce interactions.

ExperTune models and decouples multi-variable systems like 2x2, 3x3, 2x3 systems. Use ExperTune's Relative Response Time analysis to decouple and reduce interactions between loops. For interacting loops ExperTune includes cross-correlation analysis to examine if a loop is effecting others. If interactions are present, use the Relative Response Time RRT that is unique to ExperTune to prevent interactions.

For feedforward systems ExperTune models the load processes and finds the optimal feedforward compensation to use. Appropriate use of a feedforward compensation can increase performance by a factor of 10 or more.

For cascade systems, ExperTune models and tunes the cascade system simultaneously from one test. Allows for fast start up of cascade systems.

To prevent interaction, adjust the safety factor or lambda value (set point speed) in the interacting loops so that the Relative Response Time is different by a factor of 5.

Call +1 (262) 369 7711 for more information. Or email sales@expertune.com

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Software Reduces Valve Wear (July 1999)

New version of ExperTune shows how to reduce control valve wear extending valve life and useful valve service time.

ExperTune calculates optimal PV filtering and optimal PID values to reduce the valve travel and reversals for less valve maintenance cost. Lets you replace and rebuild valves less often.

The PV filter or so-called fourth tuning parameter—only ExperTune finds the optimal PV filter for your process and tuning parameters. ExperTune's proper setting of the filter ensures no degradation of performance while reducing output noise.

ExperTune compares predictions of valve travel and valve reversals numerically and graphically in the presence of noise for both current and optimized values. ExperTune's Valve Travel Index is a quantitative comparison of how far the valve will move. ExperTune's Valve Reversal Index compares the number of times the valve will change direction. Both the Reversal and Travel Indices are directly related to valve wear. The software analyzes optimized values to reduce the indices resulting in longer valve life.

ExperTune computes the effects of different kinds of PV filters: first order, second order, Butterworth or averaging filters. Try changing the filter and PID values yourself and see immediately the effect on valve wear and loop performance.

In many cases valve wear can be improved without effecting performance and robustness. The software computes a Performance Increase and a Robustness Increase which are combined with Valve Wear Analysis in a report.

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Reduce Process Variability (March 1999)

New version of ExperTune software shows how to reduce the variability of your process.

ExperTune quantifies the improvement showing variability before and after loop optimization and PID tuning. The variability of a product is how much it changes with time. Reducing the variability, increases product quality, reduces waste and rework and can increase the capacity of your process. Savings come from time and material saved as well as from higher process efficiencies.

The variability statistic is part of ExperTune's enhanced functionality. Further analysis of the process includes the range, mean, standard deviation, variance, etc. A graph with visual cues lets you quickly determine when the process is within both first and second standard deviations.

ExperTune's full suite of optimization tools make it easy to reduce the variability of your process. Use ExperTune software to analyze and tune PID loops in any industrial controller. ExperTune includes powerful simulation, modeling, robustness, linearization, and frequency response tools.

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New PID Tuning Setup Wizards (Jan 1999)

New version of ExperTune software makes it easier than ever to tune and analyze PID loops in popular PLCs and controllers.

Simple three step tuning process: 1) start ExperTune software, 2) specify the loop number or register, 3) click auto-tune.

Wizards support Allen-Bradley, Bailey, Fisher PROVOX, GE Fanuc, Modicon, and Moore Products. Connects via a user supplied DDE server so you can simultaneously do PID analysis and tuning along with monitoring your process.

The Wizards are street-smart and understand the structure of the PID block. It even checks to see that the PID loop has been programmed correctly.

ExperTune PID Tuning and Analysis Software makes it easy to analyze and tune PID loops in any industrial controller. Savings come from time and material saved as well as from higher process efficiencies. Lets you test your loop in simulation off-line before downloading the tuning. ExperTune includes powerful simulation, modeling, robustness, linearization, and frequency response tools.

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PID Loop Tuning Reports in MS Word or Reports Get Looped (Dec 1998)

The new version of ExperTune PID Analyzer/Tuner creates reports of your loop analysis in Microsoft Word. Create a detailed analysis report in the same standard format for every loop in your plant. If problems occur later, you have a detailed report for comparison. Also useful for ISO9000.

After tuning a PID loop, one mouse click creates a detailed loop report with all the analysis graphs and tuning values. For example, the power spectral plots pinpoint the cause of cyclic disturbances. The hysteresis graph helps tell you if your valve is wearing out or sized incorrectly. The robustness plot tells you how sensitive your loop is to process changes with whatever tuning you have.

All these plots and companion analysis information appear within the Word report document. The user can completely customize and configure reports. In the Word template, choose the location and size of added analysis pictures or text. It automatically generates a summary and conclusion based on information entered.

ExperTune PID Tuning and Analysis Software makes it easy to analyze and tune PID loops in any industrial controller. Savings come from time and material saved as well as from higher process efficiencies. Lets you test your loop in simulation off-line before downloading the tuning. ExperTune includes powerful simulation, modeling, robustness, linearization, and frequency response tools.

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Advanced PID Loop Analysis Tools

ExperTune Inc has released a set of Advanced PID Analysis Tools. The set includes: power spectral density analysis of your plant, auto and cross correlation analysis of the plant, control loop linearization and set point filtering options.

Applying this analysis to control loops boosts productivity by reducing variability, saving energy, increasing product quality, and reducing waste and rework.

Engineers can use the power spectral density and correlation plots to analyze the performance of a loop from normal plant operating data. The power spectral plots also pinpoint the cause of cyclic disturbances.

The linearizer helps engineers linearize the process, to get uniform performance across the entire range - run production at its optimum rather than de-tuning for oscillations.

With a setpoint filter, engineers do not have to sacrifice response to process upsets for good set point response. The tool allows both good setpoint response and disturbance rejection.

Characterizer Image, view (or download) (38k file)
Alternate Characterizer Image, view (or download) (50k file)
Power Spectral Image, view (or download) (43k file)

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Linearize Your Process for Optimal Performance

ExperTune's characterizer adds to the family of PID analysis tools from ExperTune. The characterizer linearizes your loop so you get uniform performance across the entire range of the process. Run your process optimally at any production rate.

Does your process oscillate towards one end of the range and is sluggish at the other? Linearize your control loop so control is good at any range. Use ExperTune's characterizer wherever servo control is important, to linearize flow loops, jacket temperature in split-range chemical reactors, slave loops in cascades or for any loop where the setpoint will change.

ExperTune's characterizer wizard produces source code for you in C, Basic, FORTRAN, or a series of XY points. Just cut and paste into your program. ExperTune's wizard guides you through the process of building the characterizer: 1) select steady state areas, 2) select the type of fit, linear or piecewise 3) drag the characterizer boxes to match the process characteristic 4) choose the language for the characterizer code.

Greg Shinskey, world-renowned expert in process control applications:

"Almost all temperature, level, and pressure loops which go directly to a valve can benefit by using an output characterizer. With the characterizer you are optimally tuned at all conditions of load. The characterizer should take into account the non-linearities of the entire loop not just that of controller output to flow. ExperTune's method gives you that."

Characterizer Option Tech Sheet

View (or download) image (50k file)

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Multiple PID Loop Analysis & Tuning

ExperTune's new PID Analysis and Tuning software lets you tune and analyze several loops at once.

You can view the interactions of a loop on others. Because you can tune several loops simultaneously, less time is spent starting up or maintaining your plant.

Once you've set up the loops, simply click the icon for the ones you wish to view, analyze and tune. Three easy steps to PID tuning and analysis: 1) start ExperTune, 2) specify the PID block location, 3) press the AutoTune button.

The new version runs under both Windows 95 and Windows NT. Supports connecting to any controller via DDE or direct connection to Fisher PROVOX.

View (or download) image (46k file)

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Simultaneous Industrial PID Simulation

ExperTune's new Loop Simulator lets you plot as many loops as you want simultaneously. Duplicate then edit your industrial PID loops for "What If".

Simulates single, cascade and feedforward loops. Choose from over 170 industrial PID controllers, or customize your own. Includes output limits and saturation, hysteresis, noise, digital sampling effects, gain, dead time, any number of integrators, 16 lags, inverse response, and underdamped systems.

Includes numerous time, frequency and robustness windows that let you view as many loops as you want simultaneously through several different windows.

Cascade by-pass option lets users by-pass the slave controller to analyze the benefits of cascade or if it is needed. Includes automatic PID tuning of the master based on the tuning in the slave.

Loop Simulator works with ExperTune's Analysis and PID Tuning software package which automatically set up and configure the Loop Simulator.

View (or download) image (38k file)

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NEW ExperTune Software Available - LOTS Of New Features

Release date: September 12, 1996.

Upgrades To Current Products

Major additions:

  • New improved PID tuning and process modeling engine:
    • More robust in presence of process noise and other industrial data effects.
    • Gives better automatic diagnosis of process problems and user errors.
    • Modeling improved. It automatically chooses between a more accurate first and second order. You only need to choose whether you want to force the steady state gain to be correct or not.
    • Better support of parallel PID controllers (including Allen Bradley) when you use derivative action.
    • New engine handles the rare loop with no dead time.
  • All Faceplates: added Offline analysis option. Once you've collected data you can analyze and tune the loop later without being connected.
  • All tuners: added PID Tuning Grid display. It shows you all 4 tunings, suggested sample interval, quality of frequency data fit.
  • Native Windows 95 or NT added (32 bit). On installation, ExperTune detects your operating system and automatically install the correct software. (PLC runs 16 bit on 95 or NT in this release.)
  • Reporting added. (supported in 32 bit version only) Creates a report of your loop in Word document.
    • Report includes:
      • Loop configuration
      • Loop notes
      • Current tuning
      • Tuning table
      • Time data window
    • And lets you optionally add these to the report:
      • Process model
      • Frequency response
      • Robustness plot
      • Simulation
      • Hysteresis analysis

Minor additions:

  • Any package showing a trend graph: trend length refreshes up to 1000 points (up from 100) if you change scales, trend length etc.
  • DDE Tuner working in simulation mode now simulates any controller.
  • ALL Tuners:
    • Added "Zoom back to previous" on time plot.
    • Added option to display frequency response when tuning is bad.
    • Frequency response plot: view in radians/sec or cycles/sec.
    • Safety factor limit changed to 3.
  • ALL Faceplates:
    • Added Bring back Previous PID settings to New
    • Added File|Open menu item to select .tun files and change directories
    • File Save button in setup now is Windows standard: save to any directory
    • Added ability to delete .tun (and all data files) by pressing the delete key or selecting from File|Delete.
    • On tuning, checks all loop data in .tun against archive file. Also, ensures loop tags are for unique PV and CO addresses.
  • User selectable colors for trends and bar graphs.
  • Moved display min/max and user selectable color settings to display options form.
    • Display range for one user-selected variable is shown in the right of the graph. Range for the other on the left. User selects with combo boxes.
    • Added user selection of line size.
    • Separate decimal place settings can now be set for PV, CO, and SP.
  • PLC/Interface:
  • Supports Modbus ASCII in addition to RTU
  • For Multi-Channel Trending:
    • Trend setup is now done using tabs to select the trend.
    • All references to channel changed to trend.
    • Better coverage for GES200 including a test button.
    • Ability to set the comm channel from the setup screen.
  • DDE Tuner allows quotes to be entered in DDE items

Bug fixes:

  • International compatibility bugs corrected.
  • Square root calculations corrected in trend.
  • PLC/Interface supports PD file type in AB 5/250

New Product - Loop Simulator In Windows

  • Simulates single loop, cascade, feedforward, and a 2x2 multivariable system.
  • Multiple simultaneous simulations. Compare 2, 3, 4 or any number of different simulations simultaneously. Each identified by color.
  • Select time, frequency, or robustness plots to view simultaneously. You control their size, and position on the screen.
  • Includes PID tuning.
  • Includes industrial PID controllers in detail. You can very specifically define your own controller.

Call +1 (262) 369 7711 for more information. Or email sales@expertune.com

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FREE Return On Investment Analysis For PID Tuning

ExperTune Inc will now show you how fast your payback is for getting those PID loops optimally tuned.

Answer several questions about your plant through a 5 to 10 minute interview with an ExperTune engineer. For example, "How many loops are in your plant?", "What is your hourly labor cost?". Based on your answers to these questions, the ExperTune engineer uses software to calculate a return on investment for the cost of a tuning solution. The resulting analysis output is faxed and mailed to you.

ExperTune Inc makes software for tuning, analyzing, and optimizing any manufacturer's PID controller.

Connect via DDE or direct to most popular PLCs: AB, GE, TI, Modicon, and Moore. Or, easy hook-up through voltage, thermocouple or RTD inputs and your PC serial port.

ExperTune's software includes powerful simulation, modeling, robustness and frequency analysis.

Call +1 (262) 369 7711 for more information.

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Multichannel PID Analysis Software

New ExperTune software makes it easy to analyze and optimize multiple PID loops in any controller.

Users can trend and archive data from an unlimited number of loops simultaneously. Then the user can mix and match any data channel to analyze and correlate data. This includes multiple interacting loops, cascade loops, feedforward, upstream/downstream loops, and other variables that may be affecting control.

The Multi-Channel package allows connection to your controller via:

  • Windows DDE
  • Or ExperTune's easy hook-up through voltage, thermocouple or RTD inputs and your PC's serial port.

ExperTune includes powerful simulation, modeling, robustness and frequency analysis graphs of your plant loop, simply by clicking "Analysis".

Simulation shows you the response of your loop before you download tuning. Try "what if" analysis off-line. Set point or load response plots for current and new settings. Change selection of PID tuning or modify a suggested setting and the simulation graphs update.

Robustness plots quickly show the tradeoff between tuning and stability. They show how sensitive the loop is to gain and dead time changes. See the robustness of the current and new settings before you download tuning.

Use the process model automatically identified by ExperTune to design compensators or in your own simulation.

Filtering may improve performance. Test difference filters and/or apply it to your data and instantly see the effect on PID tuning.

ExperTune automatically analyzes loop data to quickly determine if reducing hysteresis will improve loop control. ExperTune checks the valve sizing and transmitter span and makes recommendations of what to do if they are out of normal range.

ExperTune includes complete context sensitive on-line help and an easy-to-use Windows graphical interface.

Call +1 (262) 369 7711 for more information.



 

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