Example: Configuring the logging of production values (RT Unified) - WinCC Unified

Task

You want to log the temperature values of the "Filling Tank" plant object to be able to use them later for controls, for example.

To this end, you create a logging tag for the data member you want to log. This logging tag is saved in the data log of the assigned device.

You can analyze the logged tag values directly in your project, such as in a trend view, or in another user program, such as Excel.

Logging tags are created for the plant object types. This means that the plant objects are automatically supplied with the logging tags of the plant object types.

Requirement

• The "Brewery" plant view has been created and assigned to a device.

• The "Filling Tank" plant object type is created, and the "temperature" member has been configured.

Procedure

1. Open the "Conveyor" plant object type.

2. Under "Interface", jump to the "Logging tags" tab in the middle part of the work area.

3. Under "Interface" select the "Rate" data member, for example, to log it.

4. Click "Add" under "Logging tags".

   

   A logging tag is created.

   The logging tag is linked to the tag. The data type of the logging tag corresponds to the data type of the connected tag.

5. Specify the logging mode, for example, "Upon change".

6. Define the tag trigger depending on the logging mode.

7. Define the limit values.

8. Define the smoothing.

Additional information on logging tags and logging is available under "Visualizing processes with Runtime Unified".

Result

You have created a logging tag that logs tag values for the defined period and within the parameters you have specified.