Non-Volatile Latches - GE UR F35 Series Instruction Manual

5 SETTINGS
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PATH: SETTINGS FLEXLOGIC
 LATCH 1
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MESSAGE
MESSAGE
MESSAGE
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MESSAGE
The non-volatile latches provide a permanent logical flag that is stored safely and will not reset upon reboot after the relay
is powered down. Typical applications include sustaining operator commands or permanently block relay functions, such as
Autorecloser, until a deliberate interface action resets the latch. The settings element operation is described below:
• LATCH 1 TYPE: This setting characterizes Latch 1 to be Set- or Reset-dominant.
• LATCH 1 SET: If asserted, the specified FlexLogic operands 'sets' Latch 1.
• LATCH 1 RESET: If asserted, the specified FlexLogic operand 'resets' Latch 1.
LATCH N LATCH N LATCH N
TYPE SET RESET
Reset ON OFF
Dominant
OFF OFF
ON ON
OFF ON
Set ON OFF
Dominant
ON ON
OFF OFF
OFF ON
Figure 5–49: NON-VOLATILE LATCH OPERATION TABLE (N = 1 to 16) AND LOGIC
GE Multilin
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NON-VOLATILE LATCHES

LATCH 1
FUNCTION: Disabled
LATCH 1 TYPE:
Reset Dominant
LATCH 1 SET:
Off
LATCH 1 RESET:
Off
LATCH 1
TARGET: Self-reset
LATCH 1
EVENTS: Disabled
LATCH N LATCH N
ON OFF
ON OFF
Previous Previous
State State
OFF ON
OFF ON
ON OFF
ON OFF
Previous Previous
State State
OFF ON
F35 Multiple Feeder Protection System
5.5.8 NON-VOLATILE LATCHES
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LATCH 1(16)
Range: Disabled, Enabled
Range: Reset Dominant, Set Dominant
Range: FlexLogic operand
Range: FlexLogic operand
Range: Self-reset, Latched, Disabled
Range: Disabled, Enabled
5.5 FLEXLOGIC
5
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