GE PACSystems RX7i Reference Manual page 189

Chapter 4. CPU Operation
CPE400/ACC403 Status Detection & Fault Reporting
Both the CPE400 and ACC403 contain intelligence, allowing each to determine the status of the other.
This permits the CPU to report various conditions to the user via the status bits discussed in Energy Pack
Status Bit Operation.
Whenever the CPE400 detects any kind of issue with the ACC403 Energy Pack, it resumes normal
operation and issues warnings or faults to the user. The table below details the various permutations
possible at power-up. If the Cap Pack is removed during normal operation, this fault will be reported as
a failed battery fault.
Energy Pack
Cap Pack
Base
Not present
Not present
(removed or
(removed or failed)
failed)
Not present Present
(bad base) (good cap pack)
Not present
Present
(removed or
(good base)
failed)
Present Present
(good base) (good cap pack)
Present Present
(suspicious) (suspicious)
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CPE400 power-up response
Detects missing ACC403 and boots up immediately but does not use
any stored memory when resuming operations. Issues fail battery
fault.
Detects missing ACC403 and boots up immediately but does not use
any stored memory when resuming operations. Issues fail battery
fault.
When the CPU does not see a fully charged status within 45 seconds,
it does not use any stored memory when resuming operations.
Issues fail battery fault.
The CPU will wait for fully charged status within timeout period and
then resume operation using the contents of memory retained at the
previous loss of power event
If the CPU does not see a fully charged status within 45 seconds, it
does not use any stored memory when resuming operations. Issues
fail battery fault.
PACSystems* RX7i, RX3i and RSTi-EP CPU Reference Manual GFK-2222AD