Operating Instructions

System 600 APOGEE Blocks
Siemens Building Technologies, Inc. 4-7
Present Value
Displays the System 600 APOGEE point’s Current (Present) Value.
Status
Displays the current state of the point in the following format:
F A An C O ODSB PDSB HAND COV
Where:
F indicates the point is failed
A indicates the point is in alarm
An indicates an enhanced alarm (n = alarm level)
C indicates the point has been commanded into alarm
O indicates the point is out of service
ODSB indicates an operator has disabled the alarm printing
PDSB indicates a program has disabled the alarm printing
HAND indicates a point is in manual override
COV indicates the COV link for the point is active
NOTE:
When the above conditions are true, the abbreviations are displayed. When
the condition is false, the field is empty.
Totalized Value
The current totalized value when the block was opened.
COV Limit
The Change of Value (COV) Limit of the point. COV Limit is the minimum a point’s value
must change before it is reported. It is also the smallest denomination a point can be
commanded to. For example, a point with a COV limit of 1 cannot report changes of 0.2 units
and cannot be commanded to a decimal value such as 72.5.
Low and High Engineering Limit Fields
FIX requires that the maximum and the minimum values be expressed in engineering units
for each point in the database. Table 4-4 provides the information necessary to calculate the
minimum and maximum values based on information from the System 600 APOGEE. In
addition to the formulas, the following information must be known to determine the high and
low limits:
• slope
• intercept
• field panel type where the point resides (MBC or SCU)
• sensor type for which the point is defined (RTD, Thermistor, 0 to 10V, etc.)
The defaults for this field are 0 and 100. These fields MUST be changed according to the
formulas shown in Table 4-4.