GE C70 Instruction Manual page 460

CONTROL ELEMENTS
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.
SELECTOR 1 STEP-UP MODE
changes its position after a pre-defined period of inactivity at the control input. The change is automatic and does not
require any explicit confirmation of the intent to change the selector's position. When set to "Acknowledge," the selector
changes its position only after the intent is confirmed through a separate acknowledging signal. If the acknowledging
signal does not appear within a pre-defined period of time, the selector does not accept the change and an alarm is
established by setting the
— This setting specifies an acknowledging input for the stepping up control input. The pre-selected
SELECTOR 1 ACK
position is applied on the rising edge of the assigned operand. This setting is active only under "Acknowledge" mode of
operation. The acknowledging signal must appear within the time defined by the
activity of the control input. A user-programmable pushbutton is typically configured as the acknowledging input.
SELECTOR 1 3BIT A0
pre-selects the position using the following encoding convention:
A2 A1
0 0
0 0
0 1
0 1
1 0
1 0
5
1 1
1 1
The "rest" position (0, 0, 0) does not generate an action and is intended for situations when the device generating the three-
bit control word is having a problem. When
SELECTOR 1 TIME-OUT
the pre-selected position is applied on the rising edge of the
The stepping up control input (
mutually: once the stepping up sequence is initiated, the three-bit control input is inactive; once the three-bit control
sequence is initiated, the stepping up input is inactive.
SELECTOR 1 3BIT MODE
its position after a pre-defined period of inactivity at the control input. The change is automatic and does not require
explicit confirmation to change the selector position. When set to "Acknowledge," the selector changes its position 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
for three seconds.
SELECTOR 1 3BIT ACK
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 three-bit
OUT
control input have independent acknowledging signals (
SELECTOR 1 POWER-UP MODE
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
5-256
— This setting defines the selector mode of operation. When set to "Time-out," the selector
output FlexLogic operand for three seconds.
SELECTOR STP ALARM
, , and — These settings specify a three-bit control input of the selector. The three-bit control word
A1 A2
A0 Position
0 rest
1 1
0 2
1 3
0 4
1 5
0 6
1 7
SELECTOR 1 3BIT MODE
seconds after the last activity of the three-bit input. When
SELECTOR 1 STEP-UP
— This setting defines the selector mode of operation. When set to "Time-out," the selector changes
— This setting specifies an acknowledging input for the three-bit control input. The pre-selected
— This setting specifies the element behavior on power up of the relay.
).
is "Time-out," the pre-selected position is applied in
SELECTOR 1 3BIT ACK
) and the three-bit control inputs (
and
SELECTOR 1 ACK SELECTOR 1 3BIT ACK
C70 CAPACITOR BANK PROTECTION AND CONTROL SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS
setting after the last
SELECTOR 1 TIME-OUT
is "Acknowledge,"
SELECTOR 1 3BIT MODE
acknowledging input.
through
SELECTOR 1 3BIT A0
FlexLogic operand
SELECTOR BIT ALARM
SELECTOR TIME-
, accordingly).
) lock-out
A2