4 CODESYS Programming

This chapter details the specific operations involved in using CODESYS.

WARNING

The ED-PAC3020 device comes pre-installed with a valid CODESYS license by default. Reinstalling the operating system will invalidate the CODESYS license. Do not attempt to install the OS on your own.

4.1 CODESYS Software Download and Installation

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The installed CODESYS IDE version must be 3.5.19 or higher, and the PC operating system must be Windows 10 or Windows 11 (64-bit recommended).

1. Download the installation package from the official CODESYS website. The download URL is https://store.codesys.com/de/.

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When downloading from the CODESYS official website for the first time, you must first register and log in to your account.

2. Right-click the downloaded installer and select ​​"Run as administrator"​​ from the context menu.

3. Click ​​"Install"​​ in the opened installation interface, and keep the default configuration during the installation process.

4. After the installation is complete, click ​​"Finish"​​ to close the installation interface.

4.2 Obtaining and Installing Device Description File

Before connecting to the device via CODESYS, you need to download and install the device description file first.

4.2.1 Obtaining Device Description File

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The device’s default Ethernet port IP address is ​192.168.0.100. To modify it, refer to Configuring Ethernet IP.

Preparation:

• A CODESYS-authorized ED-PAC3020 is available.​
• A functional Ethernet cable is available.​
• A Windows PC is prepared, with its IP address configured to the same subnet as the device. For example, if the device’s IP (1000M Ethernet port) is 192.168.0.100, set the PC’s IP to 192.168.0.99.

Steps:

1. Connect the device's Ethernet port to the PC via an Ethernet cable, then power on the device.

2. Enter http://192.168.0.100:8100 in the PC’s web browser to access the ​​"PLC Setting"​​ interface.

3. In the ​​"Device Info"​​ section, click the "​​[Download] Device Description File"​ button to download the corresponding ​".xml"​ format device description file.

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The device files are available for download within the documentation. Different CODESYS licenses correspond to different device files. For specific descriptions and download paths, please refer to Device File and Function Correspondence Table.

4.2.2 Installing Device Description File

Preparation:

• A PC installed with ​CODESYS software version V3.5 SP19 (64-bit)​.
• An ​ED-PAC3020 device​ with a valid CODESYS license and its corresponding ​device description file.
• Connect both the PC and ED-PAC3020 to the network, ensuring their IP addresses are within the ​same subnet.

Steps:

1. Double-click the ​CODESYS icon​ on the PC desktop to open the CODESYS software. From the menu bar, select “Tools” → “Device Repository”.

2. In the opened "​Device Repository"​ pane, click "​Install".

3. In the pop-up "​Install Device Description"​ pane, select the device description file to be installed and click "​Open"​ to proceed with the installation.

4. After successful installation, you can verify in the "​Device Repository"​ that the device description file have been added successfully.

4.2.3 Installing Remote I/O Device Description File

Preparation:

• A PC installed with ​CODESYS software version V3.5 SP19 (64-bit)​.
• An ​ED-PAC3020 device​ with a valid CODESYS license.
• The ​remote I/O device description files​ have been downloaded from: Remote I/O Description Files.
• Connect the PC, ED-PAC3020, and remote I/O devices to the ​same switch. Ensure that the IP addresses of the PC, ED-PAC3020, and remote I/O devices are within the ​same subnet.

Steps:

1. Double-click the ​CODESYS icon​ on the PC desktop to open the CODESYS software. From the menu bar, select “Tools” → “Device Repository”.

2. In the opened "​Device Repository"​ pane, click "​Install".

3. In the pop-up "​Install Device Description"​ pane, select the I/O device decirption file to be installed and click "​Open"​ to proceed with the installation.

4. After successful installation, you can verify in the "​Device Repository"​ that the I/O device description file have been added successfully.

4.3 Hardware Configuration

Preparation:

• A PC installed with ​CODESYS software version V3.5 SP19 (64-bit)​.
• The device description files and remote I/O device description files have been installed.
• Connect the PC, ED-PAC3020, and remote I/O devices to the ​same switch. Ensure that the IP addresses of the PC, ED-PAC3020, and remote I/O devices are within the ​same subnet.

4.3.1 Create a New Project and Connect to the Device

Steps:

1. Power on the ED-PAC3020 and the remote I/O modules. Open the ​CODESYS software​ on the PC, select "​File"​ → "​New Project"​ in the menu bar to open the "​New Project"​ pane, and create a ​standard project.

2. Select the installed device description file and click "OK".

3. Double-click the device, select "​Scan Network"​ on the right, then choose the detected device from the scan results, and click "​OK"​ to confirm.

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• If the device cannot be detected during scanning, manually enter the ​IP address​ in the target device settings to connect.
• If a ​device login prompt​ appears, log in with your credentials (username and password) or follow the instructions to ​register a new account.

4. As shown in the figure below, this indicates the device is successfully connected.​

4.3.2 Adding Remote I/O Modules

Steps:

1. Right-click “Device” and select “Add Device” in the menu to add the EtherCAT Master.

2. Double-click on the EtherCAT Master device to set the source address (Select the EtherCAT port, which corresponds to the device's eth0 port).

3. Click the button to log in to the device. A successful login is shown in the figure below.

4. Click on the EtherCAT Master device, select “Scan for Devices” in the right-click menu, and copy all devices to the project after scanning is completed.

5. Click the button to log out of the device.

6. Double-click the slave device, configure the relevant parameters in the right-hand interface, enable "​Expert settings", select "​Enable"​ under Select ​DC​ section, and select "Enable ​Sync0".

7. Click the button to download the program to the device, then click the button to run it. As shown in the figure below, this indicates a successful operation.

4.4 Programming

The following example demonstrates practical programming using a specific coding scenario.

4.4.1 Programming Process

4.4.2 Programming Example

Complete the development and debugging of a program for a timed blinking LED using a PNP-type 8-channel digital output (DO) module.​

Preparation:

• A standard project​ has been created.
• Hardware configuration​ has been completed.
• A 24V compact LED lamp​ has been connected to the ​first output port​ of the ​remote DO (Digital Output) module.

Steps:

1. Double-click the DO module, select "​Module I/O Mapping"​ → "​Output"​ in the right-hand interface, and view the addresses of all output ports. As illustrated below, the first output port’s address is %QX18.0.

2. Click "PLC_PLG"​​ to open the programming interface, where the ​upper section​ is the ​variable declaration area​ and the ​lower section​ is the ​main program editing area.

   

3. Write the program code as follows:​

    PROGRAM PLC_PRG
VAR	

TON_TIME : TON; 
Light_Output : BOOL := FALSE; 

END_VAR

TON_TIME(IN := NOT TON_TIME.Q, 
         PT := T#0.5S); 
IF TON_TIME.Q THEN 
    Light_Output := NOT Light_Output; 
    TON_TIME(IN := FALSE); 
END_IF

%QX18.0:= Light_Output; 

4. After completing the program, click "" to compile it and ensure there are no errors.

5. Click Login to download the program to the device, then click Run to observe the LED blinking every 0.5 seconds.

4.5 Operation and Maintenance

After downloading the program to the device, you can perform the ​Run​ and ​Stop​ operations.

Status	Operations
Run Program	In the main menu of the software interface, click the Login button.
Stop Program	In the main menu of the software interface, click the stop button.