Siemens SIPROTEC 7ST6, Руководство пользователя, Страница: 6 / 356

Preface
6
7ST6 Manual
E50417-G1176-C251-A3
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:
■
External binary output signal with number (device indication)
used as input signal
Example of a parameter switch designated FUNCTION with
the address 1234 and the possible settings ON and OFF
Input signal of an analog quantity
AND gate
OR gate
Exclusive OR (antivalence): output is active, if only one of
the inputs is active
Coincidence gate (equivalence): output is active if both
inputs are active or inactive at the same time
Dynamic inputs (edge–triggered) above with positive, below
with negative edge
Formation of one analog output signal from a number of
analog input signals
Limit stage with setting address and parameter designator
(name)
Timer (pickup delay T, example adjustable) with setting
address and parameter designator (name)
Timer (dropout delay T, example non-adjustable)
Dynamic triggered pulse timer T (monoflop)
Static memory (RS-flipflop) with setting input (S), resetting
input (R), output (Q) and inverted output (Q)
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