BCI-R controller units reporting IP/SI
Summary:
There has been a failure in converting the unit of measure for the IP/SI values reported by the BCI-R. This can happen for various reasons, such as incorrect input values or a bug in the conversion algorithm
Tracer TU software and BACnet Setup Tool (BST) software allows the user to change the units from the Standard Factory Setting of SI (Celsius = System International) to IP (Fahrenheit = Imperial) or Custom. There are some reported cases where the conversion did not completely covert all points. In particular we are seeing a trend towards analog points for temperature. This may affect any one or all of the point properties including minimum value, maximum value, low limit, high limit and default value. In all reported cases there was no error message or warning that stated the unit conversion failed.
Changing controller units to IP is not required if only communicating with a Tracer SC+. See Notes section.
Converting controller units though a remote connection is not recommended.
For BCI devices with partial unit conversion failures, the BCI must be cleared and points rebuilt. This must be done at the unit and a direct USB connection is required.
Tracer TU or Tracer BACnet Setup Tool software (BST) is required to clear the controller
- Clearing BCI with (BST) BACnet Setup Tool link below
LCU Bacnet setup Tool-Rebuilding BCI Points.
Note:
It is not necessary on Trane jobs to change the equipment controller's units of measure to IP. If the units of measure selected in the SC+ does not match the units of measure in a unit controller, the SC+ will preform a units of measure conversion automatically. Only in rare circumstances is it necessary to change the controller units, integrating with 3rd party vendor is the most common example. Both TU and SC+ have user preferences setting that allows a user to change the units of measure that they view data in. Changing the controller system units has no affect on how a user views data. All factory equipment ships with SI units of measure as the default. Do not change the unit of measure setting unless there is a specific reason to do so.
WARNING:
Information in this article is intended for use by individuals possessing adequate backgrounds of electrical and mechanical experience and who comply with all federal, state, and local laws, rules, orders, or regulations related to the installation, service, or repair of a heating or central air conditioning product. Any attempt to install, service, or repair a heating or central air conditioning product may result in personal injury and/or property damage. The manufacturer or seller cannot be responsible for the interpretation of the information contained herein, nor can it assume any liability in connection with its use.