GE L30 Instruction Manual page 420

Line current differential system
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CONTROL ELEMENTS
The selector switch element is intended to replace a mechanical selector switch. Typical applications include setting group
control or control of multiple logic sub-circuits in user-programmable logic.
The element provides for two control inputs. The step-up control allows stepping through selector position one step at a
time with each pulse of the control input, such as a user-programmable pushbutton. The three-bit control input allows
5
setting the selector to the position defined by a three-bit word.
The element allows pre-selecting a new position without applying it. The pre-selected position gets applied either after
time-out or upon acknowledgement via separate inputs (user setting). The selector position is stored in non-volatile
memory. Upon power-up, either the previous position is restored or the relay synchronizes to the current three-bit word
(user setting). Basic alarm functionality alerts the user under abnormal conditions; for example, the three-bit control input
being out of range.
A selector switch runs every two power cycles.
SELECTOR 1 FULL RANGE
positions of the selector, the upper position wraps up to the lower position (position 1). When using a direct three-bit control
word for programming the selector to a desired position, the change would take place only if the control word is within the
range of 1 to the
SELECTOR FULL RANGE
FlexLogic operand for three seconds.
SELECTOR ALARM
SELECTOR 1 TIME-OUT
following two ways. When the
of the control input after which the pre-selected position is automatically applied. When the
"Acknowledge," the setting specifies the period of time for the acknowledging input to appear. The timer is re-started by
any activity of the control input. The acknowledging input must come before the
otherwise, the change does not take place and an alarm is set.
SELECTOR 1 STEP-UP
each rising edge of this signal. The position changes incrementally, wrapping up from the last (
the first (position 1). Consecutive pulses of this control operand must not occur faster than every 50 ms. After each rising
edge of the assigned operand, the time-out timer is restarted and the SELECTOR SWITCH 1: POS Z CHNG INITIATED target
message is displayed, where Z the pre-selected position. The message is displayed for the time specified by the
setting. The pre-selected position is applied after the selector times out ("Time-out" mode), or when the
MESSAGE TIME
acknowledging signal appears before the element times out ("Acknowledge" mode). When the new position is applied, the
relay displays the SELECTOR SWITCH 1: POSITION Z IN USE message. Typically, a user-programmable pushbutton is
configured as the stepping up control input.
5-242
SELECTOR 1 ACK:
Off
SELECTOR 1 3BIT A0:
Off
SELECTOR 1 3BIT A1:
Off
SELECTOR 1 3BIT A2:
Off
SELECTOR 1 3BIT
MODE: Time-out
SELECTOR 1 3BIT ACK:
Off
SELECTOR 1 POWER-UP
MODE: Restore
SELECTOR 1 TARGETS:
Self-reset
SELECTOR 1 EVENTS:
Disabled
— This setting defines the upper position of the selector. When stepping up through available
. If the control word is outside the range, an alarm is established by setting the
— This setting defines the time-out period for the selector. This value is used by the relay in the
SELECTOR STEP-UP MODE
— This setting specifies a control input for the selector switch. The switch is shifted to a new position at
Range: FlexLogic operand
Range: FlexLogic operand
Range: FlexLogic operand
Range: FlexLogic operand
Range: Time-out, Acknowledge
Range: FlexLogic operand
Range: Restore, Synchronize, Sync/Restore
Range: Self-reset, Latched, Disabled
Range: Disabled, Enabled
is "Time-out," the setting specifies the required period of inactivity
SELECTOR 1 TIME-OUT
L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS
is
SELECTOR STEP-UP MODE
timer expires;
) to
SELECTOR 1 FULL RANGE
FLASH

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