4.8
SEL-587Z Instruction Manual Date Code 20020903
Control Logic
Local Control Switches (NLBn, SLBn, CLBn, PLBn)
Settings Change
If relay settings are changed, the states of the local bits (Relay Word bits LB1
through LB8) are retained, much like in the preceding “Power Loss”
explanation. The exception is if a new local control switch is configured as an
OFF/MOMENTARY switch. Then, the corresponding local bit is forced to
start at logical 0 after the settings change, regardless of the local bit state
before the settings change.
If the local control switch is made inoperable because of a settings change, the
corresponding local bit is fixed at logical 0, regardless of the local bit state
before the settings change.
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