Index | Prev | Next

Reverting to legacy MS/TP processor

For controllers running Niagara 4.12 and later, the MS/TP engine is located, by default, on the controller RS 485 co-processor. This task describes how to configure the .platMstp-BacnetMstpPlatformServiceQnx module so that the MS/TP engine will run on the controller CPU instead.
Prerequisites:
  • You must be logged into a station that has a BACnet Network properly configured under the Station > Config > Drivers node of your station.
  • The BacnetMstpPlatformService must be available under the PlatformServices node of your station.
     NOTE: The BacnetMstpPlatformService is added under the PlatformServices node automatically when your station uses a Bacnet Mstp port for communication. This service, like many other services, is not visible by default and you must edit the PlatformServices Slot Sheet (described below) to make it visible so that you can configure it. 
Perform the following steps:
  1. From the Station > Config > Services > PlatformServices node of your controller station, right-click the BacnetMstpPlatformService component and select AX Slot Sheet from the popup menu.
    Image
    The PlatformServices AX Slot Sheet view displays.
  2. From the AX Slot Sheet view, right-click the BacnetMstpPlatformServiceQnx property and select the Config Flags menu item.
    Image
    The Config Flags dialog box opens.
    Image
  3. From the Config Flags dialog box, clear the Hidden property check box and click the OK button.
    The BacnetMstpPlatformService component should now display under the PlatformServices node in the nav tree.
  4. Right-click on the BacnetMstpPlatformService node and choose AX Slot Sheet to display the AX Slot Sheet for the selected component.
  5. In the AX Slot Sheet view, right-click on the useCoprocessor property and select Config Flags from the popup menu.
    As described in Step 2, the Config Flags dialog box opens.
  6. From the Config Flags dialog box, clear the Hidden property check box and click the OK button.
    The useCoprocessor property is now visible in the Platform Service Properties view.
  7. Double-click on the BacnetMstplatformServiceQnx node in the nav tree, set the Use Coprocessor property value to false and click the Save.
    Image
  8. Restart the station to finalize the change in processing location.

Related Links

  • Platform Services (Parent Topic)

    • Index | Prev | Next