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Exporting and Importing Cams

The BasicMotion_CamExportAndImport.project sample project is located in the installation directory of CODESYS under ..\CODESYS SoftMotion\Examples.

The example shows how to export and import a cam.

Structure of the application

The application consists of the PLC_PRG program and a CamEditor cam.

  • PLC_PRG

    The program consists of a simple state machine where a cam is created in IEC code in the STATE_CREATE_CAM state. For more information, see the following: Creating Cams Programmatically.

    Then this cam is exported in the STATE_EXPORT_CAM state using the SMC_WriteCAM function block and then imported in the STATE_START_IMPORT_CAM state using the SMC_ReadCAM function block.

  • CamEditor

    The cam does not have any meaning at first because it is not used in the application. The exported cam from PLC_PRG can be imported into the cam editor. This is a manual step which is described in the following section.

Commissioning

  1. Build the application and download it to a controller.

  2. Start the application.

    The PLC_PRG program generates the cam and exports it to the PlcLogic directory of the controller.

  3. You can also display and edit the exported cam in the cam editor. To do this, open the CamEditor cam and import the cam using the Read Cam Online File command.

  4. After you have made changes, you can export the modified cam using the Write Cam Online File command. This cam can be read into the IEC code with the SMC_ReadCAM function block and used in the application.

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