Niagara Release 2.3
Revised: August 15, 2002Niagara
Browser Access GuideChapter 2 Graphics and
CommandsUnderstanding Commands
2–8Understanding Commands
There are two basic categories of commands:
Control Commands
—These commands affect some aspect of distributed system control. Examples include establishing a setpoint or turning lights on/off.
Administrative Commands
—These commands apply to the maintenance
of the Niagara system itself, such as the handling of logged data.
C
ONTROL
C
OMMANDS
Control commands include the following types:
•Binary
output commands—To manually turn on/off lights and equipment.
•Analog output commands
—Typically, to manually set or modify setpoints.
•Multi-state output commands
—To manually control a multi-state device (for example, speed fan, or select one of several enumerated modes.
Output commands listed above can occur at two (2) of the possible 16 different priority levels
—manual (level 8) and emergency (level 1). The lowest priority level is schedule (16), and the highest level is emergency (Depending on your system’s
configuration, additional control commands may include:
•Override control commands
—To issue timed-overrides of binary loads,
analog devices or setpoints, and multi-state outputs.
•Other control commands
—Other right-click control commands are possible.
Each of the control command types above is explained separately ahead, including the default commands that may appear on the command menu.
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