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Section 6: Practice Exercises

6.1 PRACTICE EXERCISES TO IMPROVE UNDERSTANDING:

This section is to focus some exercises on specic types of application examples. Some programs

will be created using the TD200 controller and the TWIG LED valve simulator.

Practice Exercise #1 — Using ‘ADJUST’.

Goal is to make the simple way to change the irrigation time from spring irrigation to summer.

Project details:

You own a system that has 4 valves on it. You want to run each valve separately. You will run it

yourself sometimes but other times you want to have a helper start the system. You want to run

each valve for 5 hours right now during the spring and then later on during the summer heat you

want to run each valve for 10 hours. Irrigation is to cycle twice and then stop.

Make a program. How would you do it? Hint: think about

%

Solution:

Create a GROUP for each valve then make the run time of

each one for 5 hours (one water cycle =20 hours). During the

summer use the ADJUST dial position. Change the LENGTH

duration to 40 hours and notice that the % changes from

100% to 200%. Each valve will then run the 10 hours of time

you want.

Practice Exercise #2 — Using ‘SUSPEND’.

Goal is to temporarily suspend watering and then later restart back at the same place in the

irrigation. Your pump also is watering other elds so it cannot be stopped.

Project details:

You need to set the controller so that while there is spraying to be done the water is stopped on one

eld then resumed later to complete this irrigation cycle. How would you do it? Hint: think outside

the PAUSE box.

Solution:

Use the PROGRAM dial position. Select EDIT

Program. Select the program for the eld that is

to be sprayed. Press the right arrow button to

“SUSPEND”. Press ENTER. Only this program

will stop and any others that are running will stay

running. When ready to resume watering this

eld then someone needs to simply change the

program to ‘READY’.

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Bekijk gratis de handleiding van Nelson TWIG, stel vragen en lees de antwoorden op veelvoorkomende problemen, of gebruik onze assistent om sneller informatie in de handleiding te vinden of uitleg te krijgen over specifieke functies.

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