Part 2. Functional Specifications
DCM014A51 Design Guide 51
Warning: Command priority control on objects of type Value.
During a WriteProperty (Multiple) service execution, the command priority control is applied
according to the BACnet specifications.
Commands/setting changes can be issued to each indoor unit from the iTM Setup screen and
the Remote Controller (remote controller operation) (hereinafter collectively called "local
operation").
When a local operation is performed on objects of type Value, the Present_Value is changed
without changing the value of Priority_Array to allow status monitoring.
While the indoor unit control co-exists between both the BACnet operation and local
operation, the latest occurrence has priority (i.e., the last command wins). Since there is no
priority on the DIII network, and command priority control only applies to operations at the
BMS, the highest priority is not always Priority_Array value = Present_Value value.
Out_Of_Service property
Objects able to change the value (TRUE/FALSE) of the Out_Of_Service property determine its
value in accordance with the iTM settings.
However, the value is TRUE if communication has never been established with the indoor units
since the iTM was started up.
Executing a command on the Out_Of_Service property when there is a communication error or
during maintenance* returns error (WRITE_ACCESS_DENIED).
* Maintenance is a status in which the indoor unit is temporarily removed from the targets of
monitoring and control by the iTM.
About this Property
The Units property of the indoor and outdoor unit device AI and AV objects are as follows:
psi (Pounds force per square inch)
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