GE L30 Instruction Manual

Also see for L30: Communications manual Communications guide Instruction manual Instruction manual Instruction manual

Contents

5-242 L30 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUALCONTROL ELEMENTS CHAPTER 5: SETTINGS5The selector switch element is intended to replace a mechanical selector switch. Typical applications include setting groupcontrol 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 atime with each pulse of the control input, such as a user-programmable pushbutton. The three-bit control input allowssetting 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 aftertime-out or upon acknowledgement via separate inputs (user setting). The selector position is stored in non-volatilememory. 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 inputbeing out of range.A selector switch runs every two power cycles.SELECTOR 1 FULL RANGE — This setting defines the upper position of the selector. When stepping up through availablepositions of the selector, the upper position wraps up to the lower position (position 1). When using a direct three-bit controlword for programming the selector to a desired position, the change would take place only if the control word is within therange of 1 to the SELECTOR FULL RANGE. If the control word is outside the range, an alarm is established by setting theSELECTOR ALARM FlexLogic operand for three seconds.SELECTOR 1 TIME-OUT — This setting defines the time-out period for the selector. This value is used by the relay in thefollowing two ways. When the SELECTOR STEP-UP MODE is “Time-out,” the setting specifies the required period of inactivityof the control input after which the pre-selected position is automatically applied. When the SELECTOR STEP-UP MODE is“Acknowledge,” the setting specifies the period of time for the acknowledging input to appear. The timer is re-started byany activity of the control input. The acknowledging input must come before the SELECTOR 1 TIME-OUT timer expires;otherwise, the change does not take place and an alarm is set.SELECTOR 1 STEP-UP — This setting specifies a control input for the selector switch. The switch is shifted to a new position ateach rising edge of this signal. The position changes incrementally, wrapping up from the last (SELECTOR 1 FULL RANGE) tothe first (position 1). Consecutive pulses of this control operand must not occur faster than every 50 ms. After each risingedge of the assigned operand, the time-out timer is restarted and the SELECTOR SWITCH 1: POS Z CHNG INITIATED targetmessage is displayed, where Z the pre-selected position. The message is displayed for the time specified by the FLASHMESSAGE TIME setting. The pre-selected position is applied after the selector times out (“Time-out” mode), or when theacknowledging signal appears before the element times out (“Acknowledge” mode). When the new position is applied, therelay displays the SELECTOR SWITCH 1: POSITION Z IN USE message. Typically, a user-programmable pushbutton isconfigured as the stepping up control input. SELECTOR 1 ACK:OffRange: FlexLogic operand SELECTOR 1 3BIT A0:OffRange: FlexLogic operand SELECTOR 1 3BIT A1:OffRange: FlexLogic operand SELECTOR 1 3BIT A2:OffRange: FlexLogic operand SELECTOR 1 3BITMODE: Time-outRange: Time-out, Acknowledge SELECTOR 1 3BIT ACK:OffRange: FlexLogic operand SELECTOR 1 POWER-UPMODE: RestoreRange: Restore, Synchronize, Sync/Restore SELECTOR 1 TARGETS:Self-resetRange: Self-reset, Latched, Disabled SELECTOR 1 EVENTS:DisabledRange: Disabled, Enabled