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User Guide

ManualsBrandsSiemens ManualsBuilding automationDesigo CC MP 5.0 BACnet Server, BACnet Protocol Implementation Conformance Statement (PICS), Basic Documentation
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System Manager
Operation/Extended Operation
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Siemens
User Guide Version 3.0
A6V10415471
Building Technologies
2017-11-30
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
13
Available
14
Available
15
Available
16
Available
Summary Status
In order to simplify the system display and highlight the most important information,
the system sometimes combines properties into a single Summary Status property.
The Summary Status property displays the highest priority status that is currently
active for an object. For example, if an object has an active Fire Alarm and Fire
Fault, the Fire Alarm would be displayed in the Summary Status.