Appendix A: Network Points List For Wshp Open; Third Party Access To Bacnet Points In A Controller - Carrier WSHP Open v3 Integration Manual

Appendix A: Network Points List for WSHP Open

Third party access to BACnet points in a controller

BACnet system points in the i-Vu® Open controllers match physical I/O points to data, such as Outside Air Temp,
to be written to the controller through the network, rather than by using a local hardwired sensor.
When a BACnet system point is written to, the controller uses the network value, even when there is a local
sensor, as long as it is within the Min/Max refresh times noted below.
BACnet writes to system points
The following table lists all of the writeable system points that could be present in an i-Vu® Open controller. The
list of points is application-specific, therefore not all points are present in all i-Vu® Open controllers. This
information applies whether the system point is being accessed by another i-Vu® Open controller or by a third
party system.
In the i-Vu® interface, select the controller in the navigation tree and go to Properties > BACnet Objects tab. When
an i-Vu® Open controller or a third party system writes to any of the system points, you must use BACnet Priority
Level 16 and the value must not be written to or refreshed more than once per minute (60 seconds).
CAUTION If any other Priority Level is used, the value will not be recognized by the controller.
BACnet System Valid Range
Points Display
Name
System Space -50 – 150°F
Temperature
System Space RH 1 – 100%
System Space AQ 200 – 9999 ppm
System OA -50 – 150°F
Temperature
[OA] Enthalpy High (0) / Low (1)
(BACnet)
System Outdoor AQ 200 – 9999 ppm
System Water -50 – 150°F
Temperature
†System Inactive (0) / Active (1)
Fire/Smoke
†System Inactive (0) / Active (1)
WSHP Open v3
Integration Guide
BACnet/ LonWorks
Modbus Default Value*
/N2 Default Value*
-999 ~180°F
-999 -15.96
-999 64537
-999 ~180°F
Low (1) Low (1)
-999 -999
-999 ~180°F
Inactive (0) N/A
Inactive (0) N/A
35
Appendix A: Network Points List for WSHP Open
Recommended Write
Rrefresh
Time
(min/max)
1 min/5 min
5 min / 10 min
5 min / 10 min
5 min / 60 min
On change of state
5 min / 60 min
5 min / 60 min
On change of state
On change of state
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