GE B30 UR Series Instruction Manual

Also see for B30 UR Series: Instruction manual Instruction manual

Contents

5-158 B30 Bus Differential System GE Multilin5.7 CONTROL ELEMENTS 5 SETTINGS5• SELECTOR 1 TIME-OUT: This setting defines the time-out period for the selector. This value is used by the relay inthe following two ways. When the SELECTOR STEP-UP MODE is “Time-out”, the setting specifies the required period ofinactivity of 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 isre-started by any activity of the control input. The acknowledging input must come before the SELECTOR 1 TIME-OUTtimer expires; otherwise, the change will not take place and an alarm will be set.• SELECTOR 1 STEP-UP: This setting specifies a control input for the selector switch. The switch is shifted to a newposition at each rising edge of this signal. The position changes incrementally, wrapping up from the last (SELECTOR 1FULL RANGE) to the first (position 1). Consecutive pulses of this control operand must not occur faster than every50 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 forthe time specified by the FLASH MESSAGE TIME setting. The pre-selected position is applied after the selector times out(“Time-out” mode), or when the 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. Typi-cally, a user-programmable pushbutton is configured as the stepping up control input.• SELECTOR 1 STEP-UP MODE: This setting defines the selector mode of operation. When set to “Time-out”, theselector will change its position after a pre-defined period of inactivity at the control input. The change is automatic anddoes not require any explicit confirmation of the intent to change the selector's position. When set to “Acknowledge”,the selector will change its position only after the intent is confirmed through a separate acknowledging signal. If theacknowledging signal does not appear within a pre-defined period of time, the selector does not accept the changeand an alarm is established by setting the SELECTOR STP ALARM output FlexLogic operand for 3 seconds.• SELECTOR 1 ACK: This setting specifies an acknowledging input for the stepping up control input. The pre-selectedposition is applied on the rising edge of the assigned operand. This setting is active only under “Acknowledge” mode ofoperation. The acknowledging signal must appear within the time defined by the SELECTOR 1 TIME-OUT setting after thelast activity of the control input. A user-programmable pushbutton is typically configured as the acknowledging input.• SELECTOR 1 3BIT A0, A1, and A2: These settings specify a three-bit control input of the selector. The three-bit con-trol word pre-selects the position using the following encoding convention:The “rest” position (0, 0, 0) does not generate an action and is intended for situations when the device generating thethree-bit control word is having a problem. When SELECTOR 1 3BIT MODE is “Time-out”, the pre-selected position isapplied in SELECTOR 1 TIME-OUT seconds after the last activity of the three-bit input. When SELECTOR 1 3BIT MODE is“Acknowledge”, the pre-selected position is applied on the rising edge of the SELECTOR 1 3BIT ACK acknowledginginput.The stepping up control input (SELECTOR 1 STEP-UP) and the three-bit control inputs (SELECTOR 1 3BIT A0 through A2)lock-out mutually: once the stepping up sequence is initiated, the three-bit control input is inactive; once the three-bitcontrol sequence is initiated, the stepping up input is inactive.• SELECTOR 1 3BIT 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 explicit confirmation to change the selector position. When set to “Acknowledge”, the selector changes its posi-tion only after confirmation via a separate acknowledging signal. If the acknowledging signal does not appear within apre-defined period of time, the selector rejects the change and an alarm established by invoking the SELECTOR BITALARM FlexLogic operand for 3 seconds.• SELECTOR 1 3BIT ACK: This setting specifies an acknowledging input for the three-bit control input. The pre-selected position is applied on the rising edge of the assigned FlexLogic operand. This setting is active only under theA2 A1 A0 POSITION0 0 0 rest0 0 1 10 1 0 20 1 1 31 0 0 41 0 1 51 1 0 61 1 1 7