Trace Memory; Virtual Outputs - GE 745 TRANSFORMER MANAGEMENT RELAY Instruction Manual

5 SETPOINTS
Trace memory is the oscillography feature of the 745. All system inputs are synchronously digitized at a sam-
pling rate of 64 times a power cycle. Upon occurrence of a user-defined trigger condition, the 16 cycles of oscil-
lographic waveforms are captured into trace memory. The trigger condition is defined by a FlexLogic™
equation, and the number of pre-trigger cycles of data captured is programmable.
This section contains the settings (including the FlexLogic™ equation) to configure trace memory triggering.
S TRACE MEMORY
S [ENTER] for more
NO. OF PRE-TRIGGER
CYCLES: 12 cycles
TRACE TRIG FLEXLOGIC
01: Any Element PKP
The Trace Memory default Flexlogic is as follows:
TRACE TRIG FLEXLOGIC:
Virtual outputs are FlexLogic™ equations whose output (or result) can be used as inputs to other equations.
The 745 has 5 virtual outputs. One application of these outputs may be to contain a block of logic that is
repeated for more than one output.
This section contains the FlexLogic™ equations to configure virtual outputs 1 to 5.
S VIRTUAL OUTPUTS
S [ENTER] for more
VIRTUAL OUTPUT 1 (2-5)
S VIRTUAL OUTPUT 1
S [ENTER] for more
VIRTUAL 1 FLEXLOGIC
01: END
GE Power Management
This message indicates the start of the TRACE MEMORY section. To continue
these setpoints press
EN TE R
Range: 1 to 15 (steps of 1)
Enter the number of cycles of data, of the 16 cycles of waveform data to be
captured, that are to be pre-trigger information.
Range: any FlexLogic™ input or gate
The following 10 messages are the parameters of the FlexLogic™ equation
for trace memory triggering as described in the introduction to FlexLogic™.
01: Any Element PKP
02 to 12: END
This message indicates the start of the VIRTUAL OUTPUTS section. To
continue these setpoints press
This message indicates the start of the VIRTUAL OUTPUT 1 (2-5) section.
To continue these setpoints press
section.
Range: any FlexLogic™ input or gate
The following 10 messages are the parameters of the FlexLogic™ equation
for virtual output 1 (2-5) as described in the introduction to FlexLogic™.
745 Transformer Management Relay

5.7.5 TRACE MEMORY

or press for the next section.
M E SSA G E

5.7.6 VIRTUAL OUTPUTS

or press
E N TE R
M E SSA G E
or press
EN TE R
M E SS AG E
5.7 S5 OUTPUTS
5
for the next section.
for the next
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