The document provides a comprehensive guide to using the CODESYS IEC 61131-3 programming system, detailing various steps such as starting the software, configuring options, adding hardware packages, and creating and downloading a program. It covers essential procedures including setting communication parameters, compiling the program, and monitoring its operation. Step-by-step instructions ensure users can efficiently navigate through the process from project creation to execution.

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CoDeSys – First Steps
The IEC 61131-3 Programming System

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1 Starting Up the CoDeSys Software
2 Setting the Options
3 Adding in New Packages for the Hardware
4 Getting Started
5 The IOs
6 The Library
7 The Program
8 Compiling the Program
9 Controlling the Communication Settings
10 Task Configuration
Steps

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11 Setting the Communication Parameter
12 Downloading the Program
13 Running the Program
14 Saving the Program/Project
Steps

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1.1 Starting Up the CoDeSys Software
Start up the CoDeSys software and you will
get the following screen:

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1.2 Starting Up the CoDeSys Software
It is recommended to run the program at 96
dpi. You can choose to ignore this if you
wish.

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2.1 Setting the Options
Before starting the new project, you might
want to change some settings.
The following are just recommended
settings; you need not set them if you wish.
Go to “Tools”, “Options”

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2.2 Setting the Options
Choose “international Settings” in the left
panel.
Here, you can choose the language that you
want.

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2.3 Setting the Options
Choose “Features” and click on the
“Predefined feature sets” button.

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2.4 Setting the Options
Choose “Professional” and click “OK”

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2.5 Setting the Options
Choose “Load and Save”.
Click on “At startup” and choose “Show
empty environment”

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2.6 Setting the Options
Click “OK”

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2.7 Setting the Options
Choose “FBD, LD and IL editor”.
Choose the items you want to view in your
program and click “OK”

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2.8 Setting the Options
Choose “CoDeSys 2.3 converter” and click
on “(Enter a new mapping here..)”

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2.9 Setting the Options
Choose “Festo CPX-CEC/CPX-CEC-C1” and
click “OK”

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3.1 Adding the New Packages for the Hardware
In order to include the hardware into the
program, you need to install the package.
Click “Tools’; “Package Manager”

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3.2 Adding the New Packages for the Hardware
Click the icon “Install new packages”
Click the button “CD or disk...”

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3.3 Adding the New Packages for the Hardware
Locate where you place the package file.
Click on the file and click “Open”.

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3.4 Adding the New Packages for the Hardware
Click the button “Start installation’

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3.5 Adding the New Packages for the Hardware
Choose “Typical setup”
Click “Next”

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3.6 Adding the New Packages for the Hardware
Click “Next”

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3.7 Adding the New Packages for the Hardware

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3.8 Adding the New Packages for the Hardware
Click “Finish”

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3.9 Adding the New Packages for the Hardware
The package with the hardware should be
installed.

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4.1 Getting Started
We will now start creating a new program.
On the “File” menu, click “New Project…”.
Another option would be to click directly on
the “Create a new project” icon.

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4.2 Getting Started
Choose “empty project”
Give your project a name. In this case; “First
Project”
Click “OK”

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4.3 Getting Started
Right-click on “First Project”
Click on “Add Device”

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4.4 Getting Started
Alternatively, you can go to “Project”, “Add
Device”

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4.5 Getting Started
Choose the PLC you want to program to.
If it is not there, you need to install the
hardware package as previously described.
Give a name to the device and click “Add
Device”
Click “Close”

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4.6 Getting Started
Your device should appear under the
project heading.

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5.1 The IOs
Before we start, it is recommended that we
configure our inputs and outputs for the
program.
Click “Digital inputs” under the heading of
“Onboard”
A new window will appear on the right; you
would also be able to see a tab with the
“Digital Inputs” heading.

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5.2 The IOs
Here you can declare the input variables.

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5.3 The IOs
You can give it a symbolic name and also
the description.
The absolute address can also be seen.

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5.4 The IOs
You can do the same for the digital outputs.

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5.5 The IOs
This is how the different hardware variables
are called.

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6.1 The Library
Before writing the program, you might want
to add in the relevant libraries.
This need not be done at this early stage.
You can add in the library at any time when
needed.
Click on “Library Manager” on the left
window.
Click on “Add library” in the right window.

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6.2 The Library
Choose the library “Standard” under
“Application”; “Common”.
Click “OK”

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6.3 The Library
The new library will be added and you
should be able to see what it contains at the
bottom left window.

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7.1 The Program
We can now start writing the program.
Right-click on “Application”
Click on “Add Object”
Click on “POU”

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7.2 The Program
Similarly, you can add it in from the main
menu.

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7.3 The Program
Type in the name.
Choose “Program”
Click “Open”

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7.4 The Program
The programming window will appear on
the right.
You can start writing your program by
adding in the required symbols for LD.
You can click the relevant elements from the
toolbar at the top.

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7.5 The Program
At the symbols you will see question marks;
you are required to allocate the relevant
variables.

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7.6 The Program
Click on the box next to the “???”

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7.7 The Program
You can choose the variables from the
“Input Assistant”

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7.8 The Program
Choose the variable and click “OK”

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7.9 The Program
Complete the program.

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7.10 The Program – Program in Different Languages
Anytime during the writing of the program,
you can change to another language.
The three languages are:
• Ladder Diagram
• Function Block Diagram
• Instruction List

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7.11 The Program – Program in Different Languages
Click “FBD/LD/IL”
Click “View”
Choose the language you want to view your
program.

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7.12 The Program – Program in Different Languages
Choose the language you want to view your
program.

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8.1 Compiling the Program
After writing the program, we need to
compile or build the program.
This is to check for any errors.
Click on the “Build” in the menu bar and
then click “Build” or press “F11”.

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8.2 Compiling the Program
Make sure that there are no errors.
Errors and warnings will be displayed in the
bottom window.
You need not clear the warnings but all
errors must be solved or you will not be
able to download the program into your
hardware.

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9.1 Controlling the Communication Settings
Before downloading the program we must
be sure that the communication settings
between the PLC and the PC are correct.
Connect the network cable to the PLC as
well as to the PC either directly or with a
hub.
Check the address of the PLC.
Click “Online”
Click “Scan Festo devices”

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9.2 Controlling the Communication Settings
After scanning, you would be able to see the
PLC with its IP address. Take note of the
address.
If you wish, you can change the IP address
of the PLC.
This is to make sure that if there are more
than one PLC in the network, they have the
same first three numbers and a different
last number.
Click “OK”

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9.3 Controlling the Communication Settings
Now, you must change the computer
network IP address for your PC from your
control panel, network settings.
This is done in your PC depending on the
version of Windows you are using.
Click “Change Adapter Settings”

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9.4 Controlling the Communication Settings
Right-click on “Local Area Connection”, then
click on “Properties”

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9.5 Controlling the Communication Settings
Click on “Internet Protocol Version 4
(TCP/IPv4)”
Click “OK”

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9.6 Controlling the Communication Settings
Key in the IP address for the PC based on
the one from the PLC, remember that the
last number should be different.
Click “OK”
Then close all windows.

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10.1 Task Configuration
Before downloading the program, we need
to set the task.
This will tell the software which program to
download to the hardware.
Right-click on “Application”
Click “Add Object”
Click “Task Configuration”

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10.2 Task Configuration
Click “Open”

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10.3 Task Configuration
Click “Add”

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10.4 Task Configuration
Choose the POU
Click “OK”

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10.5 Task Configuration
The POU should appear in the box below.

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10.6 Task Configuration
You should see the “Task” in the left window.

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11.1 Setting the Communication Parameter
A next step is to set the communication
parameter.
Double-click on the device.
A new window will open on the right panel.

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11.2 Setting the Communication Parameter
Choose the hardware and click “Set active path”

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12.1 Downloading the Program
Once we have communication, we can
download the program.
Click “Online”
Click “Login”
If there is an existing program in the PLC,
click “Yes” to overwrite the existing
program.

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12.2 Downloading the Program
The program is downloaded.

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13.1 Running the Program
After getting “Online” click “Start” to run the
program.

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13.2 Running the Program
You can also click the  icon
The program is now running.

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13.3 Running the Program – Monitoring the Program
When the program is running, you might
want to monitor the IOs.
Click on “Debug”
Click “Write values”

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13.4 Running the Program – Monitoring the Program
Click “Run”

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13.5 Running the Program – Monitoring the Program
When you run the program, you would be
able to see the contacts change colour.

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13.5 Running the Program – Logging Out
To logout, go to “Online”
Click “Logout”

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14.1 Saving the Program/Project
To save the program, click “File”
Click “Save Project” or the “Save” icon.