Preface
SIPROTEC, 7SD80, Manual
E50417-G1140-C474-A1, Release date 09.2011
8
Besides these, graphical symbols are used according to IEC 60617-12 and IEC 60617-13 or symbols derived
from these standards. Some of the most frequently used are listed below:
■
Analog input variable
AND operation of input variables
OR operation of input variables
Exclusive OR (antivalence): output is active if only one of the inputs is
active
Coincidence: output is active if both inputs are active or inactive at the
same time
Dynamic input signals (edge-triggered) above with positive, below with
negative edge
Formation of one analog output signal from a number of analog input
signals
Threshold element with setting address and parameter names
Timer (pickup delay T adjustable) with setting address and parameter
names
Timer (dropout delay T not adjustable)
Edge-triggered time element with action time T
Static memory (SR flipflop) with setting input (S), resetting input (R),
output (Q) and inverted output (Q
), setting input dominant
Static memory (RS-flipflop) with resetting input (R) setting input (S),
output (Q) and inverted output (Q
), resetting input dominant
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