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S5 Outputs
FlexLogic™ Rules
GE Multilin
Table 5–12: FlexLogic™ Gates
Gates
Number of Inputs
NOT
1
OR
2 to 19 (for 20 parameter equations)
2 to 9 (for 10 parameter equations)
AND
2 to 19 (for 20 parameter equations)
2 to 9 (for 10 parameter equations)
NOR
2 to 19 (for 20 parameter equations)
2 to 9 (for 10 parameter equations)
NAND
2 to 19 (for 20 parameter equations)
2 to 9 (for 10 parameter equations)
XOR
2 to 19 (for 20 parameter equations)
2 to 9 (for 10 parameter equations)
Inputs and gates are combined into a FlexLogic™ equation. The sequence of entries
in the linear array of parameters follows the general rules listed in the following
section.
1.
INPUTS TO A GATE ALWAYS PRECEDE THE GATE IN THE EQUATION.
2.
GATES HAVE ONLY ONE OUTPUT.
3.
THE OUTPUT OF A GATE CAN BE THE INPUT TO ANOTHER GATE. Therefore,
according to rule 1, the former gate will precede the latter gate in the equa-
tion.)
4.
ANY INPUT CAN BE USED MORE THAN ONCE IN AN EQUATION.
5.
THE OUTPUT OF AN EQUATION CAN BE USED AS AN INPUT TO ANY EQUATION
(INCLUDING FEEDBACK TO ITSELF).
6.
IF ALL PARAMETERS OF AN EQUATION ARE NOT USED, THE 'END' PARAMETER
MUST FOLLOW THE LAST PARAMETER USED.
As an example, assume that the following logic is required to operate Output Relay
2:
Percent Diff
OPERATE
Inst Diff
OPERATE
Virtual Output 1
OPERATE
Logic Input 1
ASSERTED
Logic Input 2
ASSERTED
FIGURE 5–46: FlexLogic™ Example
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 4-input OR gate are Percent Diff OP, Inst Diff OP,
the output of the XOR gate, and the output of the AND gate. The inputs of the 2-
input AND gate are the output of the NOT gate, and Output Relay 2. The input to the
NOT gate is Logic Input 2. The inputs to the 2-input XOR gate are Virtual Output 1
and Logic Input 1. For all these gates, the inputs precede the gate itself.
http://www.GEindustrial.com/multilin
Transformer Management Relay
OUPUT IS "1" (= ON)
IF...
input is '0'
any input is '1'
all inputs are '1'
all inputs are '0'
any input is '0'
odd number of inputs are
'1'
Output Relay 2
XOR
OR
OPERATE
AND
745
5–87
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