4.6
SEL-587Z Instruction Manual Date Code 20020903
Control Logic
Local Control Switches (NLBn, SLBn, CLBn, PLBn)
EXAMPLE 4.5 Configure LB2 to
Replace the Supervisory Control Switch
Entering specific settings configures LB2 to replace the Supervisory
Control Switch.
Enable the switch, identify the function, and declare the message
that the relay displays on the front panel during the rotating display.
This message is always displayed together with the ensuing control
action.
NLB2 = Supervisory CS Local Bit LB2 Name (14 characters)
Indicate the action to the operator. Selecting Yes turns the switch on.
SLB2 = Turn ON Set Local Bit LB2 Label (7 characters)
Ask to turn the switch off. Selecting Yes turns the switch off.
CLB2 = Turn OFF Clear Local Bit LB2 Label (7 characters)
Do not set PLB2 for this example.
PLB2 = Pulse Local Bit LB3 Label (7 characters)
Label settings are made with serial port command SET T and viewed with
serial port command SHO T (see Section 5: Setting the Relay, SET and SHO
(Showset) on page 7.15 in Section 7: ASCII Command Reference).
Any given local control switch can be configured to be one of the following
three switch types:
ON/OFF
OFF/MOMENTARY
ON/OFF/MOMENTARY
Delete a Local Bit
If a local control switch is not used, “null out” all its corresponding label
settings to make it inoperable by entering “NA” for the setting (see Section 5:
Setting the Relay). The local bit that is “driven” by this inoperable local
control switch is fixed at logical 0.
Table 4.2 Local Bit Functions
Label Function Setting Display
NLB2 Enable LB2 Supervisory CS Supervisory CS
SLB2 Set LB2 to 1 Turn ON Supervisory CS Turn ON? Yes No
CLB2 Set LB2 to 0 Turn OFF Supervisory CS Turn ON? Yes No
PLB2 Pulse LB2 (not set) (no display)
Table 4.3 Local Control Switch Types and Required Label Settings
Local Switch Type Label NLBn Label CLBn Label SLBn Label PLBn
ON/OFF X X X
OFF/MOMENTARY X X X
ON/OFF/MOMENTARY X X X X
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