ZETRON 025-9581M, Installation And Maintenance Manual

Page: 73 / 196

73
Serial Port Programming
Debounce Time
This parameter is found in the Sense Input Parameter Selection Menu. It sets the debounce
time of the selected sense input. Debounce time is the delay time between the transition of
the sense input to its opposite state and the reporting of that transition. If the transitions are
closer together than the debounce time, this prevents short duration transitions (bounces)
from being reported as transition pairs. This parameter accepts any value between 0 and
255 milliseconds.
“PA Options” Menu
This sub menu is accessed from the Main menu. It gives access to several options
concerning the PA system controlled by the Station Transponder Unit. The menu shown in
Figure 22 appears when PA Options is selected. The paragraphs following the figure give
a brief description of the parameters in this menu.
Figure 22: PA Options Configuration Menu
5 Minute Fail Safe Timeout
This parameter enables or disables the 5-Minute Fail Safe timer, which turns off the PA
system if it was inadvertently left on due to a communication problem. In systems using
the Day/Night mode, which leaves the PA on for long periods of time, this parameter
must
be disabled.
PA Always Open Mode
This parameter enables and disables the PA relays, which enables the station personnel to
monitor all of the traffic passing between the dispatch center and the Station Transponder
Units. Commands from the FSA Server to turn the PA system off are ignored by the
Station Transponder Unit when this option is enabled. When this option is enabled, the
5-