Operating Instructions

Chapter 3—Applications
Applications
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Siemens Industry, Inc.
Owner's Manual
588-682
Building Technologies
2019-01-25
Alarm Management
An alarm is a status that indicates whether a point value or state is above or below a
defined value. Alarm management is the strategy used to define, route, acknowledge,
and resolve those alarms.
Points are defined as alarmable for the following reasons:
● To prevent critical problems. Points that affect human safety or can cause a severe
problem in building operation should be defined as alarmable. For example, an
alarm that notifies you that the temperature of a heating coil is too low and action
must be taken before it freezes.
● To notify you when equipment is not functioning properly. Sometimes problems
may occur and go unnoticed. Alarming is a useful tool to identify equipment that is
not working properly and to prevent other devices from becoming damaged.
● To announce scheduled maintenance. For example, an alarm can notify you when
it is time to change air filters.
Daylight Saving Time
The Daylight Saving Time (DST) functionality adjusts the system time to match the
daylight saving time change-over. If your area uses daylight saving time, this feature
offers a convenient method to automatically adjust the system clock.
Loop/Loop Tuning
The loop application is the PPCL Proportional, Integral, Derivative (PID) control loop
algorithm. The loop tuning application evaluates and calculates gains and sample
times for existing LOOP statements in PPCL. This feature calculates appropriate
Proportional, Integral and Derivative (PID) gains and sample time for a selected control
loop, based on specific building and control information defined in the LOOP
statement. When complete, you decide how to apply the newly calculated variables.
Trend Data Collection
Trending is a function that records point data over time. Trend data is either collected
when the current point value changes by a specified amount (the trend COV limit), or
point values are recorded after the system waits a specific amount of time and then the
process is repeated.
Trend data can be uploaded from the field panel to the TALON View workstation for
storage and reporting, and the data can be converted to several spreadsheet formats
for further analysis and reporting.
User Access and Privileges
A user issues commands or requests to the TC Compact Series using an operator
terminal and the operator interface program that resides in the TC Compact Series.
The operations that a particular user can perform depend on the access level assigned
to each field panel function in their user account.
User accounts are used to manage access and security for field panels on a specified
Automation Level Network (ALN). By creating individual accounts, a system
administrator can control each user’s access to objects and functions residing in field
panels on a specified ALN.