GE T60 Instruction Manual page 347

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, by directly pressing the associated front panel pushbutton, or with the graphical front panel
PUSHBTN 1 SET
interface. The state of each pushbutton is 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, by directly pressing the active front panel pushbutton, or with the graphical front panel interface.
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
interface. A pushbutton remains active for the time it is pressed physically or pressed in the graphical front panel
interface, plus the dropout time specified in the
FlexLogic, the pulse duration is specified by the
setting remains On has no effect on the pulse duration.
PUSHBTN 1 SET
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 on standard and enhanced front panels when the user-programmable pushbutton is activated,
and when in the latched mode when the user-programmable pushbutton is deactivated. With the graphical front panel
interface, instead of messages, the status of user-programmable pushbuttons can display on a single-line diagram and
can also display in annunciator page windows and in actual values page cells.
For the graphical front panel, the pushbuttons 1 to 8 are linked to the eight physical pushbuttons, and pushbuttons 9 to 16
are mapped to the graphical interface pushbuttons. To set the buttons for pushbuttons 9 to 16, access Settings > Product
Setup > Graphical Panel > Single Line Diagram Editor, click the PB symbol in the toolbox, then configure pushbuttons 9 to
16.
— 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. If
set to "Latched," the pushbutton remains on until reset.
T60 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
setting, by pressing the front panel pushbutton, or by the graphical front panel
PUSHBTN 1 SET
PUSHBTN 1 DROP-OUT TIME
PUSHBTN 1 DROP-OUT TIME
PUSHBUTTON 1 ON
and
PUSHBTN 1 AUTORST PUSHBTN 1 AUTORST DELAY
setting. If the pushbutton is activated via
only. The time the operand assigned to the
PRODUCT SETUP
and
PUSHBUTTON 1 OFF).
PUSHBTN 1 RESET
PUSHBTN 1 LOCAL
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