68
10.0 Relay Pulsing
Relay pulsing refers to a configuration where a relay turns on (closes) and then turns off
(opens) after a single switch press. An example of relay pulsing is the activation of a pre-
recorded digital message with the first switch press, and then the deactivation of the message
with the second switch press, simulating a maintained switch.
10.1 Relay Pulsing Sequence
The order of events in an example relay pulsing sequence is as follows:
1. A switch or input becomes active.
2. This activates the monitor zone Input Switch.
3. This activates the zone Latch A, which will remain latched until Latch B Timer starts
(see chapter 9).
4. Latch A activates Latch A Timer, which is linked to the output relay by advanced logic.
5. Latch A Timer activates the output relay while Latch A Timer is running. The timer is
usually set for a short period of time, such as 3 seconds, in order to simulate a pulse.
This is the first pulse.
6. Latch A Timer expires, which deactivates the output relay.
7. The switch is pressed again, or the input becomes inactive.
8. This activates the zone Latch B, which will remain latched until the switch is pressed
again or the input becomes active.
9. Latch B starts Latch B Timer, which is linked to the output relay by advanced logic.
10. Latch B Timer activates the output relay while it is running. The timer is usually set for a
short period of time, such as 3 seconds, in order to simulate a pulse. This is the second
pulse.
11. Latch B Timer expires, which deactivates the output relay.
10.2 Creating a Relay Pulsing Sequence
Follow this procedure to create the relay pulsing sequence described above.
To create a relay pulsing sequence
1. Create a monitor input zone. Tag the zone Input Switch.
2. Select the zone Input Switch, click the Advanced Logic tab, and then click Edit.
3. In the Advanced Logic Editor, create an equation that contains only the input or switch
that will start the pulse.
4. Create two timers. Specify a time in seconds, for example 3 seconds. Tag them Latch A
Timer and Latch B Timer.
5. Create another monitor input zone. Tag this zone Latch A.
6. Select the zone Latch A, click the Advanced Logic tab, and then click Edit.
7. Create the following equation:
01-00-**-IZ-007 OR (01-00-**-IZ-011 AND NOT **-**-**-TM-021 EQU
To Next Page
Loading...
Need help?
General
