Contact Outputs - GE C30 Instruction Manual

CHAPTER 5: SETTINGS
If the
VIRTUAL INPUT x FUNCTION
input. If set to "Enabled," the input operates as shown on the logic diagram and generates output FlexLogic operands in
response to received input signals and the applied settings.
There are two types of operation: self-reset and latched. If
transits from off to on, the output operand is set to on for only one evaluation of the FlexLogic equations and then return to
off. If set to "Latched," the virtual input sets the state of the output operand to the same state as the most recent received
input.
The self-reset operating mode generates the output operand for a single evaluation of the FlexLogic equations. If the
operand is to be used anywhere other than internally in a FlexLogic equation, it likely needs to be lengthened in time. A
FlexLogic timer with a delayed reset can perform this function.

5.8.3 Contact outputs

5.8.3.1 Digital outputs
SETTINGS  INPUTS/OUTPUTS  CONTACT OUTPUTS  CONTACT OUTPUT H1
 CONTACT OUTPUT H1

Upon startup of the relay, the main processor determines from an assessment of the modules installed in the chassis
which contact outputs are available and then present the settings for only these outputs.
An ID can be assigned to each contact output. The signal that can
(virtual output, element state, contact input, or virtual input). An additional FlexLogic operand can be used to
relay. Any change of state of a contact output can be logged as an Event if programmed to do so.
For example, the trip circuit current is monitored by providing a current threshold detector in series with some Form-A
contacts (see the trip circuit example in the Digital Elements section). The monitor sets a flag (see the specifications for
Form-A). The name of the FlexLogic operand set by the monitor, consists of the output relay designation, followed by the
name of the flag; for example,
In most breaker control circuits, the trip coil is connected in series with a breaker auxiliary contact used to interrupt current
flow after the breaker has tripped, to prevent damage to the less robust initiating contact. This can be done by monitoring
an auxiliary contact on the breaker which opens when the breaker has tripped, but this scheme is subject to incorrect
C30 CONTROLLER SYSTEM – INSTRUCTION MANUAL
is to "Disabled," the input is forced to off (logic 0) regardless of any attempt to alter the
VIRTUAL INPUT x type
Figure 5-71: Virtual inputs logic
CONTACT OUTPUT H1 ID

Cont Op 1
OUTPUT H1 OPERATE:

Off
OUTPUT H1 SEAL-IN:

Off
CONTACT OUTPUT H1

EVENTS: Enabled
.
Cont OP 1 IOn
is "Self-Reset," when the input signal
Range: up to 12 alphanumeric characters
Range: FlexLogic operand
Range: FlexLogic operand
Range: Disabled, Enabled
a contact output can be any FlexLogic operand
OPERATE
INPUTS/OUTPUTS
5
the
SEAL-IN
5-151