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In industrial control upper machine projects, it is sometimes necessary to develop multi-language versions for customers from different countries. In this case, the upper machine not only needs to switch the language of controls/text but also needs to switch the language of system logs collected from the robot controller.

Users can subscribe to logs of different levels (Error/Warning/Information etc.) in the control cabinet through the Event log domain in PCSDK.

For the multi-language switching issue in .netFramework, it can be implemented by updating the .resx resource files, writing the content/property information that needs to switch languages into the resource files. When switching languages, the thread’s thread.CurrentThread.CurrentUICulture needs to be reassigned, as shown in the figure below

After implementing the language switching for the upper machine controls, the author encountered an issue during the subsequent subscription log testing, showing subscription failure, regardless of whether CurrentUICulture is defined as “zh” or “en”. The error content indicates that the subscription log cannot find a folder named “iv” under the language directory, and since the language folder in the real controller does not support modification, the iv folder cannot be added manually to solve this issue.

After consulting multiple sources regarding the subscription log issue, the problem was resolved. The root cause is that when PCSDK subscribes to logs, it also reads the CurrentUICulture information of the upper machine’s current thread, and it has specific requirements for the default names of various languages. The specific resource names need to be defined, such as: en-US/zh-CN/zh-Hans etc.

At the same time, the resource files of .netFramework also need to be updated accordingly to achieve the language switching of controls

After modifying the code based on the above content and testing, when switching the upper machine interface language, the retrieved log information also changes to the corresponding language, as shown in the figure below.

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