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MX4428 MXP Engineering / Technical Manual Document: LT0273
MXP Loop Filter Board
Page 9-18 24 March 2006 Issue 1.5
9.23 RESET
9.23.1 RESET OF ADDRESSABLE DETECTOR
For about 20 seconds after reset is applied to an addressable detector, the exponential filter
and slope limiting filter are disabled if their input values are less than their output values. In
other words their outputs will follow their inputs downwards with no filtering. However
increases in input values will be filtered as usual.
If the LED is latched on due to a previous alarm it will be turned off.
The state of any AVF applied to the detector is reset to the “no-alarm” quiescent state.
RESET has no effect on 814PH detectors operating in “FastLogic” mode.
9.23.2 RESET OF DIM MODULE
Power is removed from the attached conventional detectors for about 5 seconds. Then
power is re-applied, and sampling resumes 5 seconds later.
If the DIM module LED is latched on due to a previous alarm it will be turned off.
The state of any AVF applied to the detector is reset to the “no-alarm” quiescent state.
9.23.3 RESET OF ANCILLARY INPUT DEVICE
If the LED is latched on due to a previous alarm it will be turned off.
The state of any AVF applied to the detector is reset to the “no-alarm” quiescent state.
9.23.4 RESET OF ANCILLARY OUTPUT DEVICE
No action.