4-8
The Day / Night programming application allows Custom Control to perform
one set of instructions during daytime hours and another set of instructions at
night.
The monitor device must be capable of accepting a variable operating level (for
example, a smoke sensor whose sensitivity can be changed). The following
devices support this functionality:
• TrueAlarm Photo
• TrueAlarm Heat
• TrueAlarm Ion
• TrueAlarm XPHOTO
Use the PC Programmer to program the initial sensitivity of the sensor.
Day / Night programming is done by comparing a constant that represents the
time at which an action should occur against the value of A11, the current hour
of day analog pseudo point.
Example: Suppose M1-1 is a TrueAlarm Photo sensor and a customer wants
normal 2.5% sensitivity during working hours (7am – 6pm) and higher
sensitivity (1.0%) at night. (A11 is current hour analog pseudo point).
To do this, you would need two equations similar to the following:
Equation 1:
-2
%+6)%8)68,%2 MWEQ
398
7)88,6)7,30(10):)0SFWGYVEXMSR
)2(
Equation 2:
-2
%+6)%8)68,%2 MWTQ
398
7)88,6)7,30(10):)0SFWGYVEXMSR
Program the first equation, as follows:
1. Add an input to a new equation and change its properties as shown in the
figure below.
2. Select COMPARE as the opcode and COUNTS (constant) as the qualifier.
3. In the Compare panel at the bottom of the screen, do the following:
a. Choose A11 as the Analog Pseudo.
b. Choose the equal sign as the operator.
c. In the Counts box, enter the hour at which the change takes place.
Day / Night Programming
Overview
Step 1. Program the Monitor
Device’s Point Type, Device
Type, and Custom Label
Step 2. Program Custom
Control Equations
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