Javascript is not enabled on your browser.
Javascript is required for many of our site's features to work properly. Please enable javascript in your browser preferences to continue.

Quick links available. Login, then packing list reprint, invoice reprint, product returns. More through the "My Account" menu.

Navigation

Productivity PID Loop - Part 11 - Application Demonstration

Related Products

P1-USER-M

PCON-KIT

P1-10RTB-1

P1-10RTB

P1-04PWM

P1-02HSC

P1-04RTD

P1-4ADL2DAL-2

P1-4ADL2DAL-1

P1-08DAL-2

P1-08DAL-1

P1-08ADL-2

P1-08ADL-1

P1-04AD

P1-08TA

P1-08NA

P1-15TD2

P1-15TD1

P1-16NE3

P1-02AC

P1-01DC

P1-550

P1-540

P1-START

MICSD-16G

P1-01AC

P1-08ND3

P1-08TD1

P1-08TD2

P1-15CDD1

P1-15CDD2

P1-16CDR

P1-08TRS

P1-16TR

P1-04ADL-1

P1-04ADL-2

P1-04DAL-1

P1-04DAL-2

P1-04THM

P1-04NTC

P1-08SIM

PS-PGMSW

P2-550

P2-RS

P2-START

P2-04B

P2-07B

P2-11B

P2-15B

P2-01AC

P2-01DCAC

P2-08ND3-1

P2-08NE3

P2-16ND3-1

P2-16NE3

P2-32ND3-1

P2-32NE3

P2-08TD1S

P2-08TD2S

P2-08TD1P

P2-08TD2P

P2-15TD1

P2-15TD2

P2-16TD1P

P2-16TD2P

P2-32TD1P

P2-32TD2P

P2-08NAS

P2-16NA

P2-08TAS

P2-16TA

P2-08TRS

P2-16TR

P2-04AD

P2-08AD-1

P2-08AD-2

P2-08ADL-1

P2-08ADL-2

P2-16AD-1

P2-16AD-2

P2-16ADL-1

P2-16ADL-2

P2-04DA

P2-04DAL-1

P2-04DAL-2

P2-08DA-1

P2-08DA-2

P2-16DA-1

P2-16DA-2

P2-08DAL-1

P2-08DAL-2

P2-16DAL-1

P2-16DAL-2

P2-8AD4DA-1

P2-8AD4DA-2

P2-08THM

P2-06RTD

P2-08NTC

P2-SCM

P2-HSI

P2-HSO

P2-08SIM

P3-550E

P3-550

P3-530

P3-RS

P3-RX

P3-EX

P3-03B

P3-05B

P3-08B

P3-11B

P3-01AC

P3-01DC

P3-08ND3S

P3-16ND3

P3-32ND3

P3-64ND3

P3-08TD1S

P3-08TD2S

P3-16TD1

P3-16TD2

P3-16TD3P

P3-32TD1

P3-32TD2

P3-64TD1

P3-64TD2

P3-08NAS

P3-16NA

P3-08TAS

P3-16TA

P3-08TRS

P3-08TRS-1

P3-16TR

P3-04ADS

P3-08AD

P3-16AD-1

P3-16AD-2

P3-08RTD

P3-08THM

P3-04DA

P3-08DA-1

P3-08DA-2

P3-06DAS-1

P3-06DAS-2

P3-16DA-1

P3-16DA-2

P3-8AD4DA-1

P3-8AD4DA-2

P3-SCM

P3-HSI

P3-HSO

P3-16SIM

(VID-P3-0044)

Part 11 of 11

PID Loop Application Demonstration. Productivity3000

Be More Productive.

Check out all of our videos at https://www.AutomationDirect.com/Videos

To subscribe: https://www.youtube.com/user/automationdirect?sub_confirmation=1
Facebook: https://www.facebook.com/AutomationDirect
Twitter: https://twitter.com/AutomationDirec
LinkedIn: https://www.linkedin.com/company/automationdirect

**Prices were valid at the time the video was released and are subject to change.

Hide Transcript

Now that we have our PID loop tuned, let’s check the operation of our example application. Here is our PID Loop application demo unit. We have the Productivity 3000 Programmable Automation Controller, the C-more Touch Panel, the Stack Light Tower with indicators and audible alarm, and the Power ON and Emergency Stop Push Buttons. Mounted through the lid of our Process Tank is our Ultrasonic Sensor, and next to it is our overflow shutdown float switch. Also mounted on the portable relay rack are the Process Tank, the Ball Valve, and the Reservoir Tank. Here on the side is the Primer Bulb, and above it is the Flow Indicator currently showing no flow, and mounted to the Reservoir Tank is the Diaphragm Pump we covered earlier. On the rear of the PID Demo unit are various electrical components including relays, power supplies, motor controller, protective devices, ZipLink modules, and other wiring components. Keep in mind we first started our demo unit by allowing the Diaphragm Pump to run and partially fill the Process Tank. Once we had enough water in the tank above the Process Tank’s siphon tube, we fully opened the Ball Valve, and then used the Primer Bulb to start a flow back to the Reservoir Tank. We then TUNED our PID Loop, first manually, and then automatically, and eventually achieved a fast response whenever the Set Point is changed, with minimum overshoot. Let’s start our demonstration with the process running and maintaining a volume of 3.00 gallons as seen here. We have the Ball Valve opened just enough to allow a slightly slow drainage rate as can be seen with our Flow Indicator. As seen here, the PID Loop is constantly making changes to the Process Output, controlling the Diaphragm Pump, and maintaining the desired volume. First we will change the volume to a greater amount by using the C-more Touch Panel to change our Set Point value. Currently we are maintaining a volume of 3.0 gallons, but our process now says we need to change the volume to 3.1 gallons, while keeping the same mixture ratio. On the C-more Touch Panel press the Numeric Entry button for the Tank Volume, enter 3 point 1, and then press enter. Please keep in mind that in our application we could make a change in volume as small as 0.01 gallons. Because we have changed the Set Point to increase the volume, the PID Loop Control will calculate the Error and immediately call for a Process Output of 100%, causing the Diaphragm Pump to run at the maximum one gallon per minute rate. As we get close to the final amount, we can see and hear the pump slow down. We can monitor the status of the volume by glancing at our Stack Light indicators, or take a look at the PID Parameters Screen on the C-more Touch Panel which also shows the status of the volume. Our status indicators can tell us if our volume is High, Low, or OK. Once the volume has reached our new Set Point, we can see the PID Loop Control constantly adjusting the Process Output. The new volume stays constant as the water in our process is used, which is simulated by the drainage through the Ball Valve. The PID Loop Control will maintain this volume until the Set Point value is changed, or the process is stopped. You may ask where an application for controlling the volume in a tank would be used. One possibility is a process where a solution, such as a brine solution, is being mixed to maintain a certain concentration, such as 72 ounces of sodium chloride mixed with 3 gallons of water. But instead of the entire solution being used after being mixed, the solution is being used at a random rate. And on top of that, we need to constantly maintain a set volume in our process tank that is available at any given instant for use in our process. Therefore we would need to maintain the overall volume while measuring how much solution is used at any given instant, and adjust how much additive needs to be replaced accordingly. This would be another good task for the Math Instruction available in the Productivity 3000! A little over the top, but I think you get the picture of how powerful the programming within the Productivity 3000 can be. That wraps it up for this video series on the Productivity 3000 Programmable Automation Controller by AutomationDirect, and its ability to make programming your application go quicker. I realize we covered a lot of ground in this series of videos, with most of the subject matter geared toward obtaining an understanding of PID Loops in general. But if you look back through the various titles, you will see that the actual PID Loop was done with one fill-in-the-blank instruction, a nice time saver, and from there we were able to monitor our process and automatically tune the loop once we got it going. I hope you have gained some useful information for implementing your next application, not only in using a PID Loop, but also all of the other great features offered by the Productivity 3000. Make sure to check back and look for additional Productivity 3000 videos, and other technical learning videos, here at Learn dot Automation Direct dot Com. Until next time, thank you for watching. Have a great day!

Productivity PID Loop - Part 11 - Application Demonstration

Company Information