Examining Units in the Point Mapping Utility - 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

The Point Mapping Utility defines points using Object Type, Units, and States Text attributes as they would appear for HVAC PRO applications. For N2 application points created using CCT to display properly in the Metasys system, the automatic mapping may need to be changed. See Appendix: Understanding the SCT and Online UI Insert Point Wizard Point Mapping Utility for more information.

Units boxes with no option selected must have an option selected if the PRN file indicates that particular point requires a unit (see Appendix: Understanding the SCT and Online UI Insert Point Wizard Point Mapping Utility for more information).

  1. Locate the first point which has no option selected in the Units column. The first empty Units box in this example is the OCCTIME point (Figure 1).
    Figure 1. OCCTIME Point

    Find the corresponding point entry in the application's PRN file. In the Point Mapping Utility, set the Units selector to match the units listed in the PRN file. The unit for the OCCTIME point in this example is minutes (Figure 2).
    Figure 2. Populated OCCTIME Units

  2. Search for the next Units box with no option selected (if applicable) (Figure 3).
    Figure 3. OCCLEVEL Point

    The SD_SF_BEL_xxx_SP_IP.prn file does not indicate any units for the OCCLEVEL point. In this instance, no unit should be selected.
  3. Search for the next Units box with no option selected (if applicable). The next empty Units box in this example is OCC-S (Figure 4).
    Figure 4. OCC-S Point

  4. In this example, the SD_SF_BEL_xxx_SP_IP.prn file indicates the unit is Occupancy Mode, which is a set name. The PRN file also indicates the Net Point Type is ADI and the Object Type is AI. As mentioned in Examining Units in the Point Mapping Utility, update the Object Type from AI to an object type that supports the States Text attribute, such as MI (Figure 5).
    Note: The set for the OCC-S point in the Metasys UI must be specified after the Point Mapping Utility is complete.
    Figure 5. Updated OCC-S Point

  5. Search for the next Units box with no option selected (if applicable). The next empty Units box in this example is OCCSCHED (Figure 6).
    Figure 6. OCCSCHED Point

  6. The SD_SF_BEL_xxx_SP_IP.prn file indicates the unit is Occ Mode 4 States which is a set name. The PRN file also indicates the Net Point Type is ADI and the Object Type is AO. As mentioned in Appendix: Understanding the SCT and Online UI Insert Point Wizard Point Mapping Utility, update the Object Type from AO to MO.
    Note: The set for the OCCSCHED point in the Metasys UI must be specified after the Point Mapping Utility has completed.
  7. Continue searching for Units boxes with no option selected until all have been examined.
  8. As mentioned in Appendix: Understanding the SCT and Online UI Insert Point Wizard Point Mapping Utility, new Metasys objects are given the Short Name by default, which should match the names from the VMA14xx PRN application. If any of the Short Names have custom names, update the names to match the custom names.
  9. Update the point object types as shown in Table 1 when the point is created from the CCT resource file.
    Table 1. Updating Point Object Types

    Point

    Object Type

    Update Object Type to...

    Set Number of States

    OCC-S

    AI

    MI

    Occupancy Mode 3

    OCCSCHED

    AO

    MO

    Occupancy Mode 4 States 4

    BOXMODE

    AO

    MO

    Box Mode 8

    HTGMODE

    AI

    MI

    VMA Heating 7

    OCC-MODE

    AO

    MO

    Occupancy Effective 4

  10. Click Last and then click Finish to close the Point Mapping Utility.