L-5
Appendix L
Basic Two Stage System
The figure on page L-6 demonstrates a
basic Two Stage system design. Its
operation is summarized below:
• This system will output Stage 1
audibles when the first alarm occurs.
• If the alarm is not acknowledged prior
to the expiration of stg1_timer, coded
audibles will be forced output Stage 2
audibles.
• If the alarm is acknowledged during
Stage 1, only a keyswitch will place
the system in the second stage.
• If the system is reset after the alarm
has been acknowledged and coded
audibles silenced, the system may be
reset (provided the RESET INHIBIT
logic permits).
• If a keyswitch is activated after the
ANY_ALARM flag is TRUE, the
system will output the second stage
audibles.
• In either stage, the audible silence flag/
key controls the silencing and
unsilencing of the coded audibles.
• The Panel Reset flag is used to assure
timers and latches are reset for the
next event after reset.
Trigger (ALL)
Trigger (ALL)
Run
Run
Enable
Enable
Cancel
Cancel
Start Timer
Start Timer
True
Any Alarm
Reset Inhibit
RESET_INH
30 Sec
SS_INH
Two Stage
Audible Silence
Panel Reset
True
Any Alarm
False
OR
(ANY)
List of
Keyswitch
Inputs
Keyswch
AND
(ALL)
Any_keyswch
Any alarm
Typical RESET INHIBIT Timer Function
Typical Signal Silence Inhibit Function
Typical ANY KEYSWITCH Function
Using Reset Inhibit with Timer
Содержание MXL-IQ
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