Non-Volatile Latches - GE G60 Instruction Manual

CHAPTER 5: SETTINGS

5.6.8 Non-volatile latches

SETTINGS  FLEXLOGIC  NON-VOLATILE LATCHES  LATCH 1(16)
 LATCH 1

The non-volatile latches provide a permanent logical flag that is stored safely and do not reset upon restart after the relay
is powered down. Typical applications include sustaining operator commands or permanently blocking relay functions,
such as Autorecloser, until a deliberate interface action resets the latch.
— This setting characterizes Latch 1 to be Set- or Reset-dominant.
LATCH 1 TYPE
— If asserted, the specified FlexLogic operands 'sets' Latch 1.
LATCH 1 SET
— If asserted, the specified FlexLogic operand 'resets' Latch 1.
LATCH 1 RESET
Figure 5-97: Non-volatile latch operation table (N = 1 to 16) and logic
G60 GENERATOR PROTECTION SYSTEM – INSTRUCTION MANUAL
LATCH 1

FUNCTION: Disabled
LATCH 1 ID:

NV Latch 1
LATCH 1 TYPE:

Reset Dominant
LATCH 1 SET:

Off
LATCH 1 RESET:

Off
LATCH 1

TARGET: Self-reset
LATCH 1

EVENTS: Disabled
Latch n type Latch n Latch n
set reset
Reset ON OFF
Dominant
OFF OFF
ON ON
OFF ON
Set ON OFF
Dominant
ON ON
OFF OFF
OFF ON
Range: Disabled, Enabled
Range: up to 20 alphanumeric characters
Range: Reset Dominant, Set Dominant
Range: FlexLogic operand
Range: FlexLogic operand
Range: Self-reset, Latched, Disabled
Range: Disabled, Enabled
Latch n Latch n
on off
ON OFF
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State State
OFF ON
OFF ON
ON OFF
ON OFF
Previous Previous
State State
OFF ON
FLEXLOGIC
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