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GE C30 Instruction Manual Page 218

Controller system ur series.
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Table of Contents
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5.6 CONTROL ELEMENTS
tion only after confirmation via a separate acknowledging signal. If the acknowledging signal does not appear within a
pre-defined period of time, the selector rejects the change and an alarm established by invoking the
FlexLogic™ operand for 3 seconds.
ALARM
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
the "Acknowledge" mode of operation. The acknowledging signal must appear within the time defined by the
setting after the last activity of the three-bit control inputs. Note that the stepping up control input and
TOR TIME-OUT
three-bit control input have independent acknowledging signals (
ingly).
SELECTOR 1 POWER-UP MODE: This setting specifies the element behavior on power up of the relay.
When set to "Restore", the last position of the selector (stored in the non-volatile memory) is restored after powering up
the relay. If the position restored from memory is out of range, position 0 (no output operand selected) is applied and
an alarm is set (
SELECTOR 1 PWR ALARM
When set to "Synchronize" selector switch acts as follows. For two power cycles, the selector applies position 0 to the
switch and activates
dictated by the three-bit control input. This operation does not wait for time-out or the acknowledging input. When the
synchronization attempt is unsuccessful (that is, the three-bit input is not available (0,0,0) or out of range) then the
selector switch output is set to position 0 (no output operand selected) and an alarm is established (
).
ALARM
The operation of "Synch/Restore" mode is similar to the "Synchronize" mode. The only difference is that after an
unsuccessful synchronization attempt, the switch will attempt to restore the position stored in the relay memory. The
"Synch/Restore" mode is useful for applications where the selector switch is employed to change the setting group in
redundant (two relay) protection schemes.
5
SELECTOR 1 EVENTS: If enabled, the following events are logged:
EVENT NAME
SELECTOR 1 POS Z
SELECTOR 1 STP ALARM
SELECTOR 1 BIT ALARM
5-90
).
. After two power cycles expire, the selector synchronizes to the position
SELECTOR 1 PWR ALARM
DESCRIPTION
Selector 1 changed its position to Z.
The selector position pre-selected via the stepping up control input has not been
confirmed before the time out.
The selector position pre-selected via the three-bit control input has not been confirmed
before the time out.
C30 Controller System
and
SELECTOR 1 ACK
SELECTOR 1 3BIT ACK
5 SETTINGS
SELECTOR BIT
SELEC-
, accord-
SELECTOR 1 PWR
GE Multilin

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