GE N60 Instruction Manual page 271

CHAPTER 5: SETTINGS
Each pushbutton asserts its own "On" and "Off" FlexLogic operands (for example,
These operands are available for each pushbutton and are used to program specific actions. If any pushbutton is active,
the operand is asserted.
ANY PB ON
Each pushbutton has an associated LED indicator. By default, this indicator displays the present status of the
corresponding pushbutton (on or off). However, each LED indicator can be assigned to any FlexLogic operand through the
setting.
PUSHBTN 1 LED CTL
The activation and deactivation of user-programmable pushbuttons depends on whether latched or self-reset mode is
programmed.
• Latched mode — In latched mode, a pushbutton can be set (activated) by asserting the operand assigned to the
setting or by directly pressing the associated front panel pushbutton. The state of each pushbutton is
PUSHBTN 1 SET
stored in non-volatile memory and maintained through a loss of control power.
The pushbutton is reset (deactivated) in latched mode by asserting the operand assigned to the
setting or by directly pressing the active front panel pushbutton.
It can also be programmed to reset automatically through the
settings. These settings enable the autoreset timer and specify the associated time delay. The autoreset timer can be
used in select-before-operate (SBO) breaker control applications, where the command type (close/open) or breaker
location (feeder number) must be selected prior to command execution. The selection must reset automatically if
control is not executed within a specified time period.
• Self-reset mode — In self-reset mode, a user-programmable pushbutton can be set (activated) by asserting the
operand assigned to the
active for the time it is pressed plus the dropout time specified in the
pushbutton is activated via FlexLogic, the pulse duration is specified by the
the operand assigned to the
The pulse duration of the remote set or local front panel pushbutton must be at least 50 ms to operate the
pushbutton. This allows the user-programmable pushbuttons to properly operate during power cycling events and
various system disturbances that can cause transient assertion of the operating signals.
The local and remote operation of each user-programmable pushbutton can be inhibited through the
and settings. If local inhibit is applied, the pushbutton ignores set and reset commands executed
PUSHBTN 1 REMOTE
through the front panel pushbuttons. If remote inhibit is applied, the pushbutton ignores set and reset commands
executed through FlexLogic operands.
The inhibit functions are not applied to the autoreset feature. The inhibit function can be used in SBO control operations to
prevent user-programmable pushbutton activation and ensuring "one-at-a-time" select operation.
The inhibit functions can also be used to prevent pushbutton activation from the accidental pressing of the front panel
pushbuttons. The separate inhibit of the local and remote operation simplifies the implementation of local/remote control
supervision.
Pushbutton states can be logged by the event recorder. User-defined messages can also be associated with each
pushbutton and displayed when the pushbutton is activated and when in latched mode when the pushbutton deactivated.
— This setting selects the mode of the pushbutton (Self-Reset, Latched, Disabled). If set to
PUSHBUTTON 1 FUNCTION
"Disabled," the pushbutton is not active and the corresponding FlexLogic operands (both "On" and "Off") are de-asserted.
— This setting specifies the top 20-character line of the user-programmable pushbutton message and is
PUSHBTN 1 ID TEXT
intended to provide ID information of the pushbutton. See the User-definable Displays section in this chapter for
instructions on how to enter alphanumeric characters from the keypad.
— This setting specifies the bottom 20-character line of the user-programmable pushbutton message
PUSHBTN 1 ON TEXT
and is displayed when the pushbutton is in the "on" position. See the User-definable Displays section for instructions on
entering alphanumeric characters from the keypad.
— This setting specifies the bottom 20-character line of the user-programmable pushbutton message
PUSHBTN 1 OFF TEXT
and displays when the pushbutton is deactivated and the
display when the
PUSHBUTTON 1 FUNCTION
release. The length of the "Off" message is configured with the
setting.
TIME
N60 NETWORK STABILITY AND SYNCHROPHASOR MEASUREMENT SYSTEM – INSTRUCTION MANUAL
setting or by pressing the front panel pushbutton. A pushbutton remains
PUSHBTN 1 SET
setting remains On has no effect on the pulse duration.
PUSHBTN 1 SET
PUSHBUTTON 1 FUNCTION
is "Self-reset" as the pushbutton operand status is implied to be "Off" upon its
PUSHBUTTON 1 ON
and
PUSHBTN 1 AUTORST PUSHBTN 1 AUTORST DELAY
PUSHBTN 1 DROP-OUT TIME
PUSHBTN 1 DROP-OUT TIME
is "Latched." A message does not
PRODUCT SETUP  DISPLAY PROPERTIES  FLASH MESSAGE
PRODUCT SETUP
and
PUSHBUTTON 1 OFF).
PUSHBTN 1 RESET
setting. If the
only. The time
PUSHBTN 1 LOCAL
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