Appendix D Redundant IOC Cards
Setting the Active IOC Card at Power Up
Figure D-4.
IOC Condition at Power Up
IOC States
The possible states for an IOC card are Active, Standby, Active Warmup, Standby
Warmup, Fail, Non-existent, and Disabled.
The TP5000's IOC state machine uses proprietary algorithms to determine the
proper state for an IOC card.
such as possible IOC states, the next possible state, and the conditions required for
the next state transition.
Table D-1. IOC States and Related Conditions
IOC
Description
STATE
Initial
The IOC has powered
up or rebooted and is
ready to decide its
(Not an
first state.
actual
state)
488 TimeProvider 5000 User's Guide
Table D-1
describes aspects of the state machine,
Possible
Conditions Required For
Next
Next State Transition
State
Active
The IOC State of other IOC
Warmup
card is:
Standby Warmup
Standby
Fail
Non-existent
Standby
The IOC State of other IOC
Warmup
card is:
Active Warmup
Active
Allowed State
of Other IOC
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098-00028-000 Revision F – May, 2012
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