While checking the project (design) file is the most accurate way to identify the issue, this kind of problem is typically caused by the presence of invalid PLC addresses on a specific screen.
If a screen contains even one invalid or non-communicable address, a communication error may occur, causing the screen to freeze.
Although most software detects address errors during the build process, incorrect addresses can sometimes remain in the project and be downloaded to the device.
In such cases, you must correct the invalid addresses in the project file and re-download it to the device.
In XDesignerPlus, you can go to [Tool] - [Cross Reference] to review all used addresses. Identify and remove any invalid ones.
Note: In TOP Design Studio, you can use the [Cross Reference] feature from the menu. This function communicates with the actual PLC to verify every address in the project, helping to identify any that are not accessible.
After removing the invalid addresses, re-download the project to the device.
Also, TOP panel also provides an [Address Checker] function, which communicates with the PLC to scan all addresses used in the project.
If even a single invalid or non-communicable address is found, a communication error may occur. Addresses listed in the [Invalid Address List] must be corrected in the project or checked directly on the PLC to ensure proper communication.
