*Manfred*

Dear prabakar,

General

Normally, only the executable project is transferred to the HMI device during a transfer operation. The original project data remain on the configuration device and are thus available to develop the project further in future or for error analysis.

However, on Windows CE devices with an external storage medium and on PCs, you can store not only the compiled project file but also the compressed source data file for the project. This data file can be used at a later time to recover the project from the HMI device or device by back transferring the source data file to a configuration computer.

Requirements

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The source data file can only be transferred to the HMI device as part of the transfer operation for the compiled project file. The source data file is transferred along with the compiled project file to the HMI device if the "Enable back transfer" check box is selected in the transfer settings for the respective HMI device.
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There must be sufficient memory available on the HMI device to store the compressed source data file. If the source data file for the back transfer operation is provided by a Windows CE device, this device must have an external memory card. If the HMI device does not have a memory card or if there is insufficient memory space, the transfer is terminated. However, the compiled project file is transferred in its entirety beforehand so that runtime can be started with the transferred project data.

If the source data of a large project should be stored for back transfer and an Ethernet connection is available to the operating device, you can select a network drive as the storage location rather than the memory card of the operating device. This avoids problems with the storage location.
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If there is no project opened in WinCC flexible, you must select the HMI device on which the source data file for the back transfer operation is located and the loading method in the "Communication settings" dialog prior to carrying out the back transfer operation.

If a project is open in WinCC flexible, the back transfer operation takes place from each selected HMI device. In this case, the transfer mode selected for this HMI device in the "Transfer Settings" dialog in WinCC flexible is applied.

Drain

When a source file is included in the transfer operation, the project is compressed from the source format (*.hmi) and transferred as a *.pdz file to the external storage medium of the HMI device or directly to the PC.

In the case of a back transfer operation, the *.pdz file is saved on the configuration computer. If a project was open in WinCC flexible during the back transfer, you are prompted to save and close it. Then, the project back transferred is decompressed and opened in WinCC flexible. When saving the project, you must assign a name for the back transferred project.

Procedure
1.
Apply the same back transfer mode setting for the HMI device that is in the transfer settings or communication settings of WinCC flexible.The procedure for setting the transfer method depends on the respective operating unit:
-For devices that have a system control, the transfer mode is set using an applet in the system control.

-For other devices, such as a PC and TP 170A, the transfer mode is set in the Loader menu when the device is started up.

2.

Start the back transfer using the "Transfer > Back transfer" command on the "Project" menu.

The back transfer brings the HMI device into transfer mode via remote control.

Once the back transfer is successfully completed, any open project in WinCC flexible is closed, and the back transferred project is opened with a temporary name assigned.

3.

Edit the project in WinCC flexible, and then save it with a new name.

Result

The back transferred project is saved on the configuration computer.

If the source data file of a WinCC flexible project was transferred back, the project is then opened automatically in WinCC flexible.

If the source data file of a ProTool V6.0 project was transferred back and the "migration" option is installed on the configuration computer, the migration for this project is started automatically.

Regards
Manfred