GE PACSystems RX7i Reference Manual

Chapter 4. CPU Operation
GFK-2222AD April 2018 177
Energy Pack Status Bit Operation
As shown in the table below, the CPU application program can monitor the status of the attached Energy
Pack via %S0014 (PLC_BAT) and %SA0011 (LOW_BAT). For more details, refer to the chapter on
Diagnostics in PACSystems RX7i and RX3i CPU Programmer’s Reference Manual, GFK-2950.
PLC_BAT
(%S0014)
LOW_BAT
(%SA0011)
Energy Pack Status
0
0
Energy Pack connected and operational (may be charging)
1
1
Energy Pack not connected or has failed
0
1
Energy Pack is nearing its end-of-life and should be replaced.
The LEDs on the Energy Pack also indicate its status. Refer to the documentation for each product for
corresponding LED status.
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.
If a loss of power occurs while the Energy Pack is disconnected, or before the capacitors are fully charged,
memory loss may occur.
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.

GE PACSystems RX7i Specifications

General

Brand	GE
Model	PACSystems RX7i
Category	Controller
Language	English