Note that changing PDO mappings requires editing EtherCAT slave-manufacturer-defined XMLs. As such, performing this manually is not officially supported and should be performed by the slave manufacturer instead.

To change PDO mappings for third party EtherCAT you can follow the steps below:
 

1. You need to figure out exactly what revision of device you are using. This can be found in the LabVIEW Project Explorer by right-clicking on the EtherCAT slave>>Properties. From there you should be able to see the revision as show in Figure 1

Figure 1 - LabVIEW Revision Information
 

2. Obtain the .xml configuration files from the third party manufacturer. 
3. Open the .xml file in an .xml editor, such as XML Notepad.
4. Locate the appropriate device within the .xml. There can be multiple device revisions in the same file. You need to assure that you are going to modify the correct device (Figure 2). This information must match the information found in step 1.

Figure 2 - XML Revision Number
 

5. Determine which PDO mapping you would like to activate and which is active. To do so look at the PDO mappings under the appropriate device .xml and look for the SM tag (Sync Managers tag), which indicates which mapping is active, and the PDO tag you want to activate. (Figure 3)

Figure 3 - Active PDO
 

6. Drag the SM tag to the mapping you want to activate. Only one PDO transmit section should have the SM tag. (Figure 4)

Figure 4 - New active PDO
 

7. Save the changes and delete the old .xml file from C:\Program Files (x86)\National Instruments\Shared\IndComECAT\DD
8. Re-import the new .xml file into the LabVIEW project. You should see the new PDO mapping now.
   Note: Do not modify anything else but the SM tag.
9. If you followed correctly this document you'll able to see your PDO as shown in the Figure 5:

Figure 5 - LabVIEW 3rd party Slave Example PDO