Sideloops - Metasys - LIT-12011829 - Field Device - VMA18 VAV Modular Assembly

N2 VMA Application Note

Brand
Metasys
Product name
VMA18 VAV Modular Assembly
Document type
Application Note
Document number
LIT-12011829
Revision date
2018-11-01
Language
English
If the HVAC PRO Question/Answer session has a separate control loop configured, use the Sideloop feature in CCT to add the control loop.
Note: When you add a control loop using the Sideloop wizard, you must manually update the N2 Mappings table for the new points.
Follow these steps to use the Sideloop feature in CCT to add a control loop.
  1. Add a new feature to the application. Refer to Controller Tool Help (LIT-12011147) for more information about adding a sideloop to existing applications.
  2. Click Define Hardware to assign points to the hardware. Refer to Controller Tool Help (LIT-12011147) for more information about defining hardware.
  3. Verify any attributes to map to the supervisor are BACnet Exposed.
  4. In the Features Panel Advanced tab, select N2 Mappings and configure the applicable N2 Point Addresses (Figure 1). Verify that no entries appear in red text.
    • If the value is an input, network input, output, or a calculated value within the application, set the attribute to Present Value.
    • If the value is an input or output within the application and is not a calculated value, change the attribute to Default Value.
    Note: If red entries are present, you must edit the table and enter the correct N2 point addresses using the HVAC PRO file as a guide.
    Figure 1. N2 mappings table

  5. Save the changes.
  6. Click Create PRN File. The PRN file created is used as a resource file for NAE point mapping and as a reference for updating the NCM database. If you want the PRN information to match the information produced by HVAC PRO, edit the PRN file.