User Manual

Operating Reference
System Manager
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Commanding a property is also useful under these conditions:
● User action is required to manage an emergency
● When an alarm indicates a malfunctioning device
● When performing preventive maintenance
● To save energy
● When managing operating hours totalization
Example of Commanding
At your facility, you want to change the temperature from 68 to 73°F (20 to
22.78°C) in a conference room on your floor. Using your building control software,
you send a command to change the Present Value of the Temperature Setpoint
object of the room to override the normal system control.
3.1.4.3 Command Priorities and Priority Arrays
Some objects in your building control system use specialized command priorities to
determine whether an operator or a particular control program is in control.
Command Priority
The Present Values of six object types in your building control system are based
on a command priority and established in a hierarchy that ranks from highest (1 –
Manual Life Safety) to lowest (16 - Available). The six object types are Analog
Output, Analog Value, Binary Output, Binary Value, Multi-State Output, and Multi-
State Value. The hierarchy helps determine which source has priority over another
to change the value of an object. To command one of these object types, you—or
an application—must have a command priority equal to or greater than the current
command priority of the object.
Command Priority Array
The Command Priority Array displays commands that have been issued at various
priority levels. Users and applications can set or relinquish (release) commands for
a commandable object. If the Present Value of an object has a Command Priority
Array, the appropriate priority level is commanded or relinquished when you
execute a command. If the Present Value of an object does not have a Command
Priority Array, the system overwrites the present value with the newly commanded
value. You can command or relinquish any priority level that you have access to,
based on your user privileges.
The following table shows the Command Priority Array:
Priority Level Priority Name
1
Manual Life Safety
2
Automatic Life Safety
3
Available
4
Available
5
Critical Equipment Control
6
Minimum On/Off
7
Available
8
Manual Operator
9
Available
10
Available
11
Available
12
Available