Non-Volatile Latches - GE D60 Instruction Manual

5.4 FLEXLOGIC™
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PATH: SETTINGS FLEXLOGIC
# LATCH 1
#
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 HMI action resets the latch. The settings, logic, and element operation are 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.
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• LATCH 1 RESET: If asserted, the specified FlexLogic™ operand 'resets' Latch 1.
LATCH N LATCH N LATCH N
TYPE SET RESET
Reset ON
Dominant
OFF
ON
OFF
Set ON
Dominant
ON
OFF
OFF
Figure 5–37: NON-VOLATILE LATCH OPERATION TABLE (N=1 to 16) AND LOGIC
5-74
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NON-VOLATILE LATCHES

LATCH 1
FUNCTION: Disabled
LATCH 1 TYPE:
MESSAGE
Reset Dominant
LATCH 1 SET:
MESSAGE
Off
LATCH 1 RESET:
MESSAGE
Off
LATCH 1
MESSAGE
TARGET: Self-reset
LATCH 1
MESSAGE
EVENTS: Disabled
LATCH N LATCH N
ON OFF
OFF ON OFF
OFF Previous Previous
State State
ON OFF ON
ON OFF ON
OFF ON OFF
ON ON OFF
OFF Previous Previous
State State
ON OFF ON
D60 Line Distance Relay
5.4.8 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
SETTING
SETTING
LATCH 1 FUNCTION:
LATCH 1 TYPE:
Disabled=0
Enabled=1 RUN
SETTING
LATCH 1 SET:
Off=0 SET
SETTING
LATCH 1 SET:
Off=0 RESET
5 SETTINGS
FLEXLOGIC OPERANDS
LATCH 1 ON
LATCH 1 OFF
842005A1.CDR
GE Multilin