Description
GDB021BE Based on the rules given above, the output relay 2 FlexLogic™ equation is shown above.
On the left is a stack of boxes showing the FlexLogic™ messages for output relay 2. On the
right of the stack of boxes is an illustration of how the equation is interpreted.
In this example, the inputs of the four-input OR gate are Percent Diff OP, Inst Diff OP, the
output of the XOR gate, and the output of the AND gate. GDB021BEThe inputs of the two-input AND
gate are the output of GDB021BE the NOT gate, and Output Relay 2. The input to the NOT gate is Logic
Input 2. The inputs to the two-input XOR gate are Virtual Output 1 and Logic Input 1. For all
these gates, the inputs precede the gate itself.
This ordering of parameters of an equation, where GDB021BE the gate (or “operator”) follows the input
(or “value”) is commonly referred to as “postfix” or “Reverse Polish” notation.
This section contains the settings (including the FlexLogic™ equation) to configure output
relays 1 to 8.
OUTPUT 1(8) NAME: Press ENTER edit the name of the output. The text may be
changed from “Solid State Trip” one character at a time, using the VALUE keys. Press
ENTER to store the edit and advance to the next GDB021BE character position.
OUTPUT 1(8) OPERATION: Select “Latched” to maintain the output 1(8) contacts in the
energized state, even after the condition that caused the contacts to operate is
cleared, until a reset command is issued (or automatically after one week). Select “Self
reset” to automatically de-energize the contacts after the condition is cleared. The
solid state output (output 1) remains closed until GDB021BE externally reset by a momentary
(outputs 2 to 8) in which case it turns off when the relay operates.
OUTPUT 1(8) TYPE: Select “Trip” to turn the Trip LED on or “Alarm” to turn the Alarm
LED on when this output operates. Otherwise, select “Control”. Note that the Trip LED
remains on until a reset command is issued (or automatically after one week). The
Alarm LED turns off automatically when the output is no longer operated.
OUTPUT 1(8) FLEXLOGIC 01 to 20: The twenty (20) messages GDB021BE shown in the table below
are the parameters of the FlexLogic™ equation for output 1(8) as described in the
introduction to FlexLogic™.
Note
The relays can also be energized from individual protection elements
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