6
Programmable Logic
General Description
The protective device includes programmable logic equations for programming inputs,
outputs, blocking of protective functions, and custom logic functions in the relay.
The logic provides control of the output relays based on the state of the inputs that can
be chosen from the assignment list (protective function pickups, protective function
states, breaker states, system alarms and module inputs – see
). The user can use the output signals of a logic equation as inputs in
higher equations (e. g.: the output signal of logic equation 10 might be used as an input
of logic equation 11).
t-On Delay
t-Off Delay
Gate Out
Timer Out
Out
Out inverted
Set
Reset
Type of logic gate selectable
S
R
Q
Q
Inverting settable
Delay Timer
AND
OR
NAND
NOR
Inverting settable
Inverting settable
Inverting settable
Inverting settable
IN4
IN3
IN2
IN1
Inverting settable
Reset Latched
LogicMain_E01
Fig. 50: Principle Overview.
If no signal is assigned to a logic gate (All inputs are “0”), then the output of the gate will
be set as follows:
• “0” for an AND gate
• “1” for a NAND gate
• “0” for an OR gate
• “1” for a NOR gate
If at least one input signal is assigned to a gate all not assigned inputs are set to:
• “1” for AND / NAND gates
• “0” for an OR / NOR gates
212
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EMR-3MP0
6 Programmable Logic