4-4
Standard NAC Example. Figure 4-1 shows an example of pre-signal
Custom Control equations for a facility that uses standard NAC devices.
Information on QuickAlert devices is contained in the example at the end of this
section.
• Equation 1. The input side of this equation monitors the Physical
Abnormal state of each device within list L26, which is a user-defined list
containing the automatic initiating devices (smokes/heats, for example) for
Floor 1. The output side of Equation 1 programs SIG1 to sound (slow
march tone) when any point within list L26 enters a physical abnormal
condition (i.e., when any smoke sensor activates).
• Equation 2. The input side of this equation monitors the Physical
Abnormal state of each device within list L26, which is a user-defined list
containing the automatic initiating devices (smokes/heats, for example) for
Floor 1. If any point within L26 activates and P1 (pseudo point for
unacknowledged alarms) is ON (i.e., no operator acknowledgment has
occurred), a timer starts. This timer runs for five minutes (300 seconds).
When it expires, the NACs convert to a temporal pattern. Note that you
must assign an analog pseudo point (A26 in this example) to the timer.
• Equation 3. This equation’s input side monitors the Physical Short state
of each device within L27, which is a list containing the floor’s pull
stations. If a device within this list is active (i.e., pulled), the output side of
this equation programs the NACs to activate in a temporal pattern.
Figure 4-1. Pre-Signal Custom Control, Standard NACs
Continued on next page
Pre-Signal Operation, Continued
Step 6. Add Custom Control
Equations
Equation 1
Equation 2
Equation 3
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