GE P642, Technical Manual

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V01002
DNP Latch
ON
DNP Latch
ON
DNP Latch
OFF
DNP Latch
OFF
Control Input
(Latched)
Aliased Control
Input
(Latched)
Control Input
(Pulsed )
Aliased Control
Input
(Pulsed )
The pulse width is equal to the duration of one protection iteration
Figure 154: Control input behaviour
Many of the IED’s functions are configurable so some of the Object 10 commands described in the following
sections may not be available. A read from Object 10 reports the point as off-line and an operate command to
Object 12 generates an error response.
Examples of Object 10 points that maybe reported as off-line are:
●
Activate setting groups: Ensure setting groups are enabled
● CB trip/close: Ensure remote CB control is enabled
●
Reset NPS thermal: Ensure NPS thermal protection is enabled
● Reset thermal O/L: Ensure thermal overload protection is enabled
●
Reset RTD flags: Ensure RTD Inputs is enabled
● Control inputs: Ensure control inputs are enabled
6.3.4 OBJECT 20 BINARY COUNTERS
Object 20, binary counters, contains cumulative counters and measurements. The binary counters can be read as
their present ‘running’ value from Object 20, or as a ‘frozen’ value from Object 21. The running counters of object
20 accept the read, freeze and clear functions. The freeze function takes the current value of the object 20 running
counter and stores it in the corresponding Object 21 frozen counter. The freeze and clear function resets the Object
20 running counter to zero after freezing its value.
Binary counter and frozen counter change event values are available for reporting from Object 22 and Object 23
respectively. Counter change events (Object 22) only report the most recent change, so the maximum number of
events supported is the same as the total number of counters. Frozen counter change events (Object 23) are
generated whenever a freeze operation is performed and a change has occurred since the previous freeze
command. The frozen counter event queues store the points for up to two freeze operations.
6.3.5 OBJECT 30 ANALOGUE INPUT
Object 30, analogue inputs, contains information from the IED’s measurements columns in the menu. All object 30
points can be reported as 16 or 32-bit integer values with flag, 16 or 32-bit integer values without flag, as well as
short floating point values.
Analogue values can be reported to the master station as primary, secondary or normalized values (which takes
into account the IED’s CT and VT ratios), and this is settable in the COMMUNICATIONS column in the IED.
P64x Chapter 16 - Communications
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