MINI-LINK BAS 6-32
Technical Description EN/LZB 111 0542 P2B
• The CP then uses the configuration data contained in the current
database to define the boards configuration, according to their
state before the cold restart.
• The connection handler establishes all permanent cross-
connections that existed before the cold restart.
• The event log is maintained, not cleared.
• The alarm log is reset to only hold active alarms.
Until this process has been completed, the system remains in the cold
restart state, and all attempts to manipulate boards or cross-
connections will be rejected.
6.12.2.2 Board Cold Restart
Board cold restart is initiated, for example, when a board is removed
and re-inserted or when a power failure has occurred.
Boards that do not come in properly, that is they restart many times
without reaching a consistent state, are automatically set to the
unmanaged state by the equipment handler to avoid control system
overload.
6.12.3 Hot Restart
Hot restart is applied to a part of the CP software or the complete CP
software. Hot restart does not involve the system hardware, that is
traffic is left unaffected. A hot restart is initiated when any major
software process or module has failed. When this happens:
• Process and configuration data is kept, but an audit procedure
takes place in order to enforce that the boards and cross
connections in the system are consistent with data known by the
CP.
• The event log is kept.
• The alarm log is reset to only hold active alarms.
Until this process has been finished any attempt to manipulate boards
or cross connections will be rejected.
Hot restart of a single CP software module is also called a running
restart. Such minor restarts will not prevent the manipulation of
boards or cross connections more than for a very short time.
If a CP software module recognise the occurrence of a serious
problem, the following steps are envisaged:
• The software module will first try to recover using a “local” hot
restart, only involving itself.
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