Execution of a Download

Downloading the PLC project causes the active project to be compiled. In addition to a syntax check, program code is generated and loaded onto the controller. A program that is running on the controller is stopped during the download.

Execution of a Download 1:

All variables except persistent variables are reinitialized during the download.

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Download at login

The connection settings of the controller are set correctly. The applications in the project and on the controller are identical. The program is running on the controller. The PLC project is logged out.
1. Change your PLC project.
2. Select the command Login in the PLC menu or in the TwinCAT PLC Toolbar Options.
A dialog appears indicating that the application was changed since last download.
3. Select the option Login with download and click OK.
The program that is running on the controller is paused while the change is loaded onto the controller. The PLC project is logged in.

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Download in logged-in state (online mode)

The connection settings of the controller are set correctly. The applications in the project and on the controller are identical. The program is running on the controller. The PLC project is logged in.
1. Select an object in the PLC project tree. Ideally a POU or GVL in this case.
2. In the context menu select the command Edit Object (Offline).
The object opens in the editor.
3. Change the object. for example by declaring a new variable or changing a value assignment.
4. Select the command Download in the PLC menu.
You will be asked whether you really want to carry out the Download operation.
5. Confirm the dialog with Yes.
The program that is running on the controller is paused while the change is loaded onto the controller.

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