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Chapter 9. Diagnostics
9.4.12
Battery Status (Group 18)
Faults in this group occur when the CPU detects a failed battery (or Energy Pack).
Action: Non-configurable.
0, Failed Battery
CPUs with battery-backed RAM, including RX7i CPUs, and RX3i CPU310, CPU315, CPU/CRU320
and NIU001
The battery in the CPU module has failed or is disconnected.
If the battery is disconnected, this fault is logged for all CPU types and all supported battery types.
Should a Smart Battery fail during operation, this fault is logged for all CPU types. When used with a
legacy (non-smart) battery, this indication is not reliable.
CPE302, CPE305 and CPE310
The Energy Pack has failed or is disconnected.
Correction
Replace the battery or Energy Pack. For instructions on replacing the battery, refer to the
PACSystems Battery and Energy Pack Manual, GFK-2741.
1, Low Battery – CPUs with Battery-Backed RAM
This fault is supported only by the CPU versions listed in the PACSystems Battery and Energy Pack
Manual, GFK-2741.
The CPU detects the low battery condition only while the CPU is powered up.
If a low battery condition occurs while the CPU is powered down, the CPU logs a Low Battery fault
upon power-up as soon as it detects the signal from the smart battery.
While the CPU is powered up, it is unlikely that a Low Battery fault will be detected because the
current drain on the battery is negligible. The exception is when a good battery is replaced with a low
battery while the CPU has power. In this case, a Low Battery fault would indicate that a good battery
has been accidentally replaced with a depleted battery.
The Controller fault table indicates the battery status. For details of LED operation of specific CPUs,
refer to PACSystems RX7i, RX3i and RSTi-EP CPU Reference Manual, GFK-2222.
When a Failed Battery fault is logged, this fault is also logged.
Correction
Replace the battery. For instructions on replacing the battery, refer to the PACSystems Battery and
Energy Pack Manual, GFK-2741.
1, Low Battery – CPE302/CPE305/CPE310/CPE330 CPUs with Energy Pack
The Status LED and the Controller fault table indicate the Energy Pack status.
PLC_BAT
LOW_BAT
(%S0014)
(%SA0011)
0
0
1
1
0
1
412
PACSystems* RX7i, RX3i and RSTi-EP CPU Programmer's Reference Manual
Energy Pack Status
Energy Pack connected and operational (may be charging)
Energy Pack not connected or has failed
Energy Pack is nearing its end-of-life and should be replaced.
GFK-2950C
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