GE PACSystems RX7i Reference Manual

Chapter 4. CPU Operation
GFK-2222AD April 2018 179
4.11.4 Retention of Data Memory Across Power Failure
The following types of data are preserved across a power cycle with an operational battery (for RX3i
CPE302, CPE305, CPE310, CPE330),CPE400 models with an operational and attached Energy Pack. RSTi-
EP CPE100/CPE115 have in built super capacitor for data retention.
▪ Application program
▪ Fault tables and other diagnostic data
▪ Checksums on programs and blocks
▪ Override data
▪ Data in register (%R), local register (%L), and program register (%P) memory
▪ Data in analog memory (%AI and %AQ)
▪ State of discrete inputs (%I)
▪ State of retentive discrete outputs (%Q)
▪ State of retentive discrete internals (%M)
The following types of data are not preserved across a power cycle:
▪ State of discrete temporary memory (%T)
▪ %M and %Q memories used on non-retentive -()- coils
▪ State of discrete system internals (system bits, fault bits, reserved bits).

GE PACSystems RX7i Specifications

General

Brand	GE
Model	PACSystems RX7i
Category	Controller
Language	English