GE PACSystems RX7i - Page 189

Chapter 4. CPU Operation
178 PACSystems* RX7i, RX3i and RSTi-EP CPU Reference Manual GFK-2222AD
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
Base
Cap Pack
CPE400 power-up response
Not present
(removed or failed)
Not present
(removed or
failed)
Detects missing ACC403 and boots up immediately but does not use
any stored memory when resuming operations. Issues fail battery
fault.
Not present
(bad base)
Present
(good cap pack)
Detects missing ACC403 and boots up immediately but does not use
any stored memory when resuming operations. Issues fail battery
fault.
Present
(good base)
Not present
(removed or
failed)
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.
Present
(good base)
Present
(good cap pack)
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
Present
(suspicious)
Present
(suspicious)
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.