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6
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Central to the operation of the Freeway router is the control card. The card is a sub-
module fitted to any one of the router cards in the system and is used to control and
configure the router. Optionally, two cards may be fitted to provide backup in the
event that one microprocessor card should fail. Full details on configuring the control
card are given in Section 6 of the Freeway Technical Manual.
The Freeway RS422 card may or may not therefore host a control card. If it does, then
a card reset may be performed as described in the following section.
n
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.
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7
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There are physically two RESET switches available to perform a hard reset of the
Freeway controller. One is located on the edge of the 2440 sub-module and the other
is remotely located on the front edge of the host card on which the 2440 is sited.
Pressing either has the same effect.
Initiating a hard reset is akin to powering down and powering up the frame housing
the control card. The controller re-boots and follows the usual power-up sequence. It
should be noted that the panels will shut down and then be restored after
initialisation has completed. It should also be noted that resetting the active
controller in a dual control environment will cause system changeover.
If no changes have been made to the database, then no crosspoints will be changed.
Crosspoint settings may change if the level type for a level was changed prior to the
reset, as during initialisation the crosspoints are set according to the level type for
that level.
It is also advisable to perform a reset after database parameters are changed as
certain changes only take effect after a reset, i.e. changing level type, panel type,
source overrides, and controllable destinations.
