# Check the Application in TIA Portal

Check the application in TIA Portal as follows to make sure it runs properly:

1. To set a new byte value for User Data in the monitoring variables, set the new value in the Modify value column, then click the Modify all selected values once and now icon.

   Note: This value is in hexadecimal format by default.

2. To give a rising edge to the Set User Data bit, first set it to TRUE, then to FALSE. Make sure to click the Modify all selected values once and now icon each time the value is modified.

   After this bit is set to TRUE, the Set User Data Ack bit also changes to TRUE, indicating that the data from User Data is sent out on the PROFINET network.

   After resetting the Set User Data bit back to FALSE, the Set User Data Ack bit is also set to FALSE.

   The new data can now be seen in the In-Sight 3D Spreadsheet, in the cells that contain the GetBufferData function.