Kentec Electronics Sigma XT Plus, Руководство по эксплуатации и обслуживанию

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Man-1112 Sigma XT+_23 Page 40 of 52
17. Internal Controls
17.1 Detection part
17.1.1 Watchdog reset
If for any reason the microprocessor in the detection part of the control panel fails to carry out its operation
correctly it will attempt to restart. This process is called a “watchdog” and the control panel must record and
indicate these events.
If a watchdog event occurs, the detection part panel will show the Fault and System Fault LEDs on the front panel,
the CPU fault LED inside the panel will light and the buzzer will sound. This fault can only be cleared by pressing
the Watchdog Reset button on the PCB inside the control panel. The control panel buzzer will continue to sound
until the watchdog activation is reset.
17.1.2 Processor reset
Once started, the microprocessor controlling the detection part of the panel should continue to run continuously
without interruption. If the microprocessor fails to run correctly it can be reset by pressing the Processor Reset
button on the PCB inside the control panel.
This should not normally be necessary but should be done as a matter of course if the system is behaving
abnormally. The system should resume normal operation within a couple of seconds of pressing the processor
reset button. It will be necessary to pres the Watchdog Reset button a few seconds after pressing the Processor
Reset button to clear the Watchdog indication and buzzer.
17.1.3 Write enable switch
It is necessary to protect the configuration memory of the panel while it is running normally. To do this a memory
Write Enable switch is provided. The memory Write Enable switch must be switched on before any changes can be
made to the configuration. The Write Enable switch is quite fragile and should be operated with care.
Internal controls on detection part of
control panel
17.2 Extinguishant modules
17.2.1 Watchdog reset
If the microprocessor on an extinguishant module fails to carry out its operation correctly it will attempt to restart.
If a watchdog event occurs, the Extinguishant module will show Fault and System Fault LEDs on the front panel,
the detection part of the panel will show a fault and the buzzer will sound and the display on the Extinguishant
module will show CPU fault
This fault can only be cleared by pressing the Watchdog Reset button on the Extinguishant module. The control
panel buzzer will continue to sound until the watchdog activation is reset.
17.2.2 Processor reset
If the microprocessor on an Extinguishant module fails to run correctly it can be reset by pressing the Processor
Reset button on the PCB inside the control panel.
This should not normally be necessary but should be done as a matter of course if the system is behaving
abnormally. The system should resume normal operation within a couple of seconds of pressing the processor
reset button.
17.2.3 Terminate extinguishant
Once the extinguishant outputs have been operated they can not be switched off until after the reset inhibit timer
has elapsed. For test purposes a terminate extinguishant button is provided which will terminate operation of the
extinguishant outputs and allow the system to be reset.
17.2.4 Write enable switch
It is necessary to protect the configuration memory of extinguishant modules while the system is running
normally. To do this a memory Write Enable switch is provided on each module. The memory Write Enable switch
must be switched on before any changes can be made to the configuration. The Write Enable switch is quite fragile
and should be operated with care.
W/ DOG
RESET RESET
WRITE
ENABLE
PROC
.