Issue
How can the Niagara R2 UNC be setup to monitor DI1 and DI2 contacts status of the Viconics VT7600 Series Lon thermostat?
Environment
Niagara R2
UNC-410, UNC-520
Cause
How can the Niagara R2 UNC be setup to monitor DI1 and DI2 contacts status of the Viconics VT7600 Series Lon thermostat?
Resolution
The DI status of the Viconics VT7600 Series thermostat can be accessed through its nvoSccStatus SNVT. The DynamicDemux (Demux) object will be used to expose the status of the DI inputs, as well as other thermostat status points, in the UNC. The Demux object allows for the various status points of the nvoSccStatus SNVT to be brought into the UNC individually as bits. The DI1 status is on bit18 and DI2 status is on bit17 of the VT7600 Series nvoSccStatus SNVT.
The following steps need to be taken to expose the DI inputs in the UNC. It is assumed that the VT6000 shadow object is been commissioned in the UNC.
- Open the page containing the VT700 thermostat shadow object in Workspace Editor view.
- Open the /tridiumx/lonworks/conversion folder; copy and paste the DynamicDemux object to the Workspace.
- Right-click the VT7600 shadow object and select link, then select the DynamicDemux object.
- Select nvoSccStatus under the VT7600 column and then select link under DynamicDemux column. Click OK to save.
You can now link the bits to objects you selected to monitor their status. DI1 is bit18 and DI2 is bit17 of the Demux object.
