GE M60 Instruction Manual

Also see for M60: Communications manual Communications guide Instruction manual Instruction manual

Contents

5-234 M60 MOTOR PROTECTION 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.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 STEP-UP MODE — This setting defines the selector mode of operation. When set to “Time-out,” the selectorchanges its position after a pre-defined period of inactivity at the control input. The change is automatic and does notrequire any explicit confirmation of the intent to change the selector's position. When set to “Acknowledge,” the selector 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