Simplex TFX-500M, Руководство оператора

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warning indication. For example, a detector identifies an accumulation of smoke or heat that may have resulted from a fire,
but the alarm threshold has not yet been reached. A “Pre-alarm Warning”message will be displayed, but the signalling
appliances and LEDs do not respond. Proceed as follows:
1. Accept the event (see Section 1.4). Note the location of the event.
2. Remedy the cause of the condition indicated, taking care to determine whether the warning was
caused by a fire condition or a trouble (device or system fault, etc.). Monitor the system to determine
whether or not the detector develops an alarm condition some time later on. If a fire condition is pres-
ent, an alarm will be triggered, regardless of whether the pre-alarm event was accepted or not.
2.5.2. Alarm Verification
Detector Alarm Verification Mode---- CONSYS programming allows certain detectors to be programmed for “Alarm
Verification Mode.”When a detector on a 2-way data circuit (ISN-512I/P or ISA-412I/P) is confirmed into the Alarm band, it
enters a Verification mode. An “ALARM VERIFYING”event is generated and a RETARD--RESET--RESTART period of 30
seconds is started. After the RETARD-RESET-RESTART period ends, a 60-second CONFIRMATION time period begins.
If, at any time during this CONFIRMATION period, the device is re-confirmed into an ALARM, an ALARM will be raised. If
the device is not confirmed into the ALARM band during the CONFIRMATION period, then the Verification is concluded an
the device returns to the Non-Verification mode.
IXA-500DM Module with Alarm Verification— IXA-500DM Conventional Detector Module may have its “Verification”
function enabled. Once the control unit has displayed an “Alarm Verifying” message, a 10-second “reset” period is
generated. After the reset period, a 60-second “confirmation”period is begun. If, during the confirmation period, the control
unit determines that a detector is in alarm, an “Alarm”condition will be triggered. The system will not return to standby for at
least 60 seconds after reset; and then, only if there are no alarms.
Note: When the system returns to standby, no message is
displayed, except the usual date/time display.
If there are no other troubles or events, the system will return to the normal, or Standby mode. The display will return to the
normal date/time display.
NOTE: Alarms override trouble conditions. Any trouble conditions that
have been overridden by an alarm will now be displayed.
Alarm Verification Counters— A record is kept of the number of times a particular addressable point (detector or detector
Module) has entered into an alarm verification sequence. When the alarm verification counter for a particular device
exceeds a threshold count (set by CONSYS) a trouble event is generated indicating that the point in question may require
maintenance (for example, a dirty detector). System RESET restores all verification counters to zero.
2.6. Positive Alarm Sequence (PAS)
NFPA 72 codes allow for an alarm response called Positive Alarm Sequence (PAS). PAS (enabled through CONSYS)
allows trained personnel to investigate an alarm occurrence in a specified manner before activation of the alarm indicating
apliances. The TFX-500M/800M Positive Alarm Sequence operates as follows:
1. The signal from a detector (smoke/heat) selected for the purpose (PAS) shall be acknowledged at the
control unit by trained personnel within fifteen (15) seconds of annunciation in order to initiate the
alarm investigation phase. If the signal is not acknowledged in 15 seconds, all normal building and
remote signals will be activated afutomatically.
2. Trained personnel will have upto 180 seconds during the alarm investigation phase to determine the
fire condition and reset the system. If the system is not reset during this investigation phase, all nor-
mal building and remote signals will be activated automatically.
3. If a secnodd selected automatic fire detector is actuated during the alarm investigation phase, all nor-
mal building and remote signals will immediately be activated automatically.
4. If any other initiating device is actuated, all nurmal building and remote signals will be activated auto-
matically.
5. The system shall provide means to bypass the positive alarm sequence.
2.7. Fault Overflow
When there are multiple fault conditions in the TFX-500M/800M system (more than 15), a “Fault Overflow”condition
occurs. When this happens, individual trouble/fault information may not be reliable until the fault overflow condition is
removed.
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