Emerson PNC001-A Series User Manual

PACSystems™ RX3i and RSTi-EP CPU Reference Manual Section 4
GFK-2222AK October 2019
CPU Operation 116
4.10.3.3.2 Energy Pack Replacement
If an Energy Pack fails, you can replace it while the CPU is in operation. Use a compatible
new unit or a compatible replacement Cap Pack. Whenever an Energy Pack is replaced,
the newly installed Cap Pack must build up its charge.
In the case of ACC402 attached to CPE330, the Energy Pack, when hot-swapped, draws
minimal current in order to recharge: it may therefore take up to 10 minutes for ACC402
to charge completely. This is normal operation. Similarly for ACC403/CPE400 and
ACC403/CPL410.
If a loss of power occurs while the Energy Pack is disconnected, or before the capacitors
are fully charged, memory loss may occur.
4.10.3.3.3 CPE330/ACC402 Status Detection & Fault Reporting
Both the CPE330 and ACC402 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 CPE330 detects any kind of issue with the ACC402 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
CPE330 power-up response
Not present
(removed or
failed)
Not present
(removed or
failed)
Detects missing ACC402 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 ACC402 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 90 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
90 seconds, it does not use any stored memory when
resuming operations. Issues fail battery fault.

Emerson PNC001-A Series Specifications

General

Brand	Emerson
Model	PNC001-A Series
Category	Controller
Language	English