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GE C30 Instruction Manual Page 305

Controller system.
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CHAPTER 5: SETTINGS
The selector switch element is intended to replace a mechanical selector switch. Typical applications include setting group
control 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 a
time with each pulse of the control input, such as a user-programmable pushbutton. The three-bit control input allows
setting 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 after
time-out or upon acknowledgement via separate inputs (user setting). The selector position is stored in non-volatile
memory. 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 input
being out of range.
A selector switch runs every two power cycles.
— This setting defines the upper position of the selector. When stepping up through available
SELECTOR 1 FULL RANGE
positions of the selector, the upper position wraps up to the lower position (position 1). When using a direct three-bit control
word for programming the selector to a desired position, the change would take place only if the control word is within the
range of 1 to the
SELECTOR FULL RANGE
FlexLogic operand for three seconds.
SELECTOR ALARM
— This setting defines the time-out period for the selector. This value is used by the relay in the
SELECTOR 1 TIME-OUT
following two ways. When the
of the control input after which the pre-selected position is automatically applied. When the
"Acknowledge," the setting specifies the period of time for the acknowledging input to appear. The timer is re-started by
any activity of the control input. The acknowledging input must come before the
otherwise, the change does not take place and an alarm is set.
— This setting specifies a control input for the selector switch. The switch is shifted to a new position at
SELECTOR 1 STEP-UP
each rising edge of this signal. The position changes incrementally, wrapping up from the last (
the first (position 1). Consecutive pulses of this control operand must not occur faster than every 50 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 for the time specified by the
setting. The pre-selected position is applied after the selector times out ("Time-out" mode), or when the
MESSAGE TIME
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.
— This setting defines the selector mode of operation. When set to "Time-out," the selector
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
SELECTOR STP ALARM
— 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.
C30 CONTROLLER SYSTEM – INSTRUCTION MANUAL
SELECTOR 1 TARGETS:
Self-reset
SELECTOR 1 EVENTS:
Disabled
. If the control word is outside the range, an alarm is established by setting the
is "Time-out," the setting specifies the required period of inactivity
SELECTOR STEP-UP MODE
output FlexLogic operand for three seconds.
Range: Self-reset, Latched, Disabled
Range: Disabled, Enabled
SELECTOR STEP-UP MODE
timer expires;
SELECTOR 1 TIME-OUT
SELECTOR 1 FULL RANGE
setting after the last
SELECTOR 1 TIME-OUT
CONTROL ELEMENTS
is
5
) to
FLASH
5-149

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