Emerson PACSystems RX3i - Page 125

PACSystems™ RX3i and RSTi-EP CPU Reference Manual Section 4
GFK-2222AK October 2019
CPU Operation 117
4.10.3.3.4 CPE400/CPL410/ACC403 Status Detection & Fault Reporting
Both the CPU (CPE400 or CPL410) 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 or CPL410 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/CPL410 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.