098-00028-000 Revision F – May, 2012 TimeProvider 5000 User’s Guide 489
Appendix D Redundant IOC Cards
Setting the Active IOC Card at Power Up
Active
Warmup
This IOC is warming
up and will become
the active IOC
Active Oscillator warmup
completion criteria
attained
If GPS is selected
reference, all GPS
validation has been
completed and time
has been set
Standby
Warmup
Fail
Non-existent
Standby
Warmup
This IOC is warming
up and will become
the standby IOC
Standby
IOC has synchronized
its configuration from
the other IOC
Oscillator warmup
completion criteria
attained
If GPS is selected
reference, all GPS
validation has been
completed and time
has been set
Other IOC is Active
Active Warmup
Active
Warmup
Other IOC State = Standby
Warmup, Standby, Fail, or
Non-existent
Active This IOC is in a
normal operating
mode. It is actually
providing all IOC user
input- and
output-related
functions.
Standby
Internally generated
health reason
User-issued command
to switch
Standby
Warmup
Standby
Fail
Non-existent
Standby This IOC is in a
normal operating
mode. It is capable of
providing all IOC user
input- and
output-related
functions, but it is not
Active.
Active
Internally generated
health reason
User-issued command
to switch
Active
Table D-1. IOC States and Related Conditions (Continued)
IOC
STATE
Description Possible
Next
State
Conditions Required For
Next State Transition
Allowed State
of Other IOC