Programming A Utility Monitoring Point; Overview; Step 1. Change The Heat Detector's Point Type And Custom Label; Step 2. Change The Aux Relay Point's Point Type And Custom Label - Simplex 4010 Applications Manual

Programming a Utility Monitoring Point

Overview

Step 1. Change the Heat
Detector's Point Type and
Custom Label
Step 2. Change the AUX
Relay Point's Point Type and
Custom Label
Step 3. Define a Supervisory
Digital Pseudo Point
Step 4. Program Custom
Control Equations
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Utility monitoring points differ from standard fire alarm points in that they do
not report a trouble when they activate and they do not latch (i.e., they reset
themselves). A utility monitoring point tracks the state of a monitor device (for
example, a heat sensor), turning a relay or supervisory pseudo point on when the
sensor's value equals or exceeds an analog value that you specify.
This section uses an example in which a customer wants a water heater to come
on and a supervisory alert to occur when the temperature of a water tank is
between 38 and 50 degrees.
Use the PC Programmer to change the heat detector's point type to Utility. This
is a generic point type with no default operation, allowing the point to be
controlled by Custom Control. Assign a descriptive custom label, such as
"Water Temp Monitor – Tank 2" to the point.
The output point is typically a relay (AUX1, for example). Use the PC
Programmer to change its point type to Relay. This is a generic point type that
allows the point to be controlled via Custom Control. Change its custom label
to a descriptive text, such as "Water Heater Control Relay Tank 2."
Use the PC Programmer to define a user digital pseudo point. Assign it a point
type of Supervisory, which means it will generate a Supervisory alert to the
panel when activated. Change its custom label to the message that you want to
appear on the panel when the monitor's threshold point is reached. For
example, "Water Tank Temp Warning."
The Custom Control example, shown in Figure 4-3, outlines the equation needed
to program the example water tank/heater application. This equation contains
two input qualifiers and two output qualifiers.
1st Input Qualifier. The first input qualifier in the example equation checks
the value of the heat sensor to determine if it is greater than or equal to 38
degrees. To do this, you need to program this input statement's properties, as
follows:
1. Choose the COMPARE opcode and select COUNTS (constant) for the
qualifier.
2. Enter the threshold value in the Counts box at the bottom right of the panel.
The example shows 38, which represents a temperature value in this
example.
3. Choose the greater than or equal to (>=) operator.
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