GE B30 UR Series Instruction Manual page 280

5.7 CONTROL ELEMENTS
• SELECTOR 1 TIME-OUT: This setting defines the time-out period for the selector. This value is used by the relay in
the following two ways. When the
inactivity of the control input after which the pre-selected position is automatically applied. When the
is "Acknowledge", the setting specifies the period of time for the acknowledging input to appear. The timer is
UP MODE
re-started by any activity of the control input. The acknowledging input must come before the
timer 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 new
position at each rising edge of this signal. The position changes incrementally, wrapping up from the last (
) to the first (position 1). Consecutive pulses of this control operand must not occur faster than every
FULL RANGE
50 ms. After each rising edge of the assigned operand, the time-out timer is restarted and the
POS Z CHNG INITIATED
the time specified by the
("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
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", the
selector will change 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 will change 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
• SELECTOR 1 ACK: This setting specifies an acknowledging input for the stepping up control input. The pre-selected
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
5
last 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:
A2 A1
0
0
0
0
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
applied in
SELECTOR 1 TIME-OUT
"Acknowledge", the pre-selected position is applied on the rising edge of the
input.
The stepping up control input (
lock-out 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: This setting defines the selector mode of operation. When set to "Time-out", the selector
changes 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 posi-
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
5-158
SELECTOR STEP-UP MODE
target message is displayed, where Z the pre-selected position. The message is displayed for
FLASH MESSAGE TIME
SELECTOR STP ALARM
A0 POSITION
0 0 rest
0 1 1
1 0 2
1 1 3
0 0 4
0 1 5
1 0 6
1 1 7
seconds after the last activity of the three-bit input. When
SELECTOR 1 STEP-UP
B30 Bus Differential System
is "Time-out", the setting specifies the required period of
setting. The pre-selected position is applied after the selector times out
SELECTOR SWITCH 1: POSITION Z IN USE
output FlexLogic operand for 3 seconds.
is "Time-out", the pre-selected position is
SELECTOR 1 3BIT MODE
) and the three-bit control inputs (
5 SETTINGS
SELECTOR STEP-
SELECTOR 1 TIME-OUT
SELECTOR 1
SELECTOR SWITCH 1:
message. Typi-
setting after the
SELECTOR 1 TIME-OUT
SELECTOR 1 3BIT MODE
acknowledging
SELECTOR 1 3BIT ACK
through
SELECTOR 1 3BIT A0
SELECTOR BIT
GE Multilin
is
)
A2