This is a new series of various articles using a Virtual PLC called OTee. In the second episode, we will introduce methods for creating programs, defining variables, and using FBs on the OTee Platform.
Come on, let’s enjoy FA.
Foreword
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We are currently running the “Takahashi Chris” radio show with Full-san (full＠桜 八重 (@fulhause) / X) which I deliver every Wednesday night.
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We publish technical information related to factory production technology and control systems for free, through blogs and videos.
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Reference Link
http://soup01.com/en/category/otee_en/
Implementation
Add a new program
Click the + button below to add a new program to the OTee Platform.
The Create an entity screen will appear.
You can change the Type’s Drop-Down List or the items to be added.
For this article, set Program → Name to enter the program name, and Save to save the settings.
Done!So we added a new program.
Adding local variables
Open the program you just added and open the Local Tab. It will be the area for defining local variables in the program. To add a variable, click on “Add variable” below.
Done!So I defined a new variable.
Add TON FB
Define a TON timer FB in Local. Click on the Data Type column to the left of the variable you just defined.
The variable data type selection screen appears.
Select TON.
Done!So I defined TON FB.
Variable Rename
To create a program that is easy to read, define variable names that are easy to understand.
Done!
Edit Variable Group Name
In fact, the variable we just defined is already in a variable group. Let’s edit the name of that variable group.
Done!
Adding Variable Groups
Next, add variable groups. As the project grows, it is more efficient to manage variables in groups.
Done!So a new group of variables was added.
Separate different groups by variables to suit your application.
TON Program
Next, add the TON timer FB to the program.
Done!The OTee Platform also automatically adds input/output templates.
Let’s assign the variables we declared earlier to parameters.
Adding task instances
Now that we have added a new program, we need to create an instance that will call it. Click on Tool bar>Configuration on the left.
Here you will see the task and global variable definition screens.
Click on “Add an instance” under Task 0.
Done!A new Instance has been added.
Select the program you just added (OB1 in this example) from the Drop-Down List.
Next, let’s change the Instance name.
Done!
compile
Click Compile to compile the program.
Download
Next, click “Download project to device” to download the project to Raspberry pi.
Done!
Tag Browser
To check the result, open the OB1 you just added → Click on Tag Browser.
Done!You can check the current values of variables from this screen.
Also, if you want to change the current value of an individual variable, double-click on that variable and enter the new value.
For example, change a BOOL type variable to true.
Done!
And the TON timer is starting to add time.
result
Done!As shown in the figure below, TON.Q became TRUE after 1 second.
CTU Program
Next, add a CTU (Counter UP FB). Add a CTU type Instance to the Local Variables area.
Done!Please use the same operation as before to change variable names, etc.
The next step is to add the program.
result
Done!As shown in the figure below, when the CU input receives a rising signal from OFF to ON, the CV value is added to 1.
