GE LPS-O Instruction Manual page 203

9 SERVICING
Table 9–2: RUN-TIME BACKGROUND SELF-TESTS
Component
Flash Memory (PROM)
EPROM
RAM
Nonvolatile RAM
CAPRAM
Table 9–3: RUN-TIME FOREGROUND SELF-TESTS
Component
A/D Controller
Digital Input Circuitry
Digital Output Circuitry
Trip Circuit Continuity
LUI
GE Power Management
Method
CRC-type check
Checksum type check
Protection values checked for
correctness; Configurable logic checked
for validity
CRC-type check on settings area
Checksum on fault storage area
Method
DMA interface
Comparison of bits read via two separate
optocouplers
Loop-back test
Bit read via bus
Operator initiated, visual feedback
LPS-O Line Protection System
9.2 SERVICING WITH THE RELAY SELF-TEST
Processor
960 CPU
DSP
960 CPU
960 CPU
960 CPU
Processor
960 CPU
960 CPU
960 CPU
960 CPU
960 CPU
Nature
Critical, restart
Critical, restart
Critical, restart
Non-critical
Nature
Critical
Non-critical, turn off
pilot protection
Critical, restart
Non-critical
Non-critical
9-
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