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SME2-IS - Manual - 06 - 2021
INTRODUCTION
Symbols.ai
Symbols
Internal logical signal (output); may be a logical state (e.g. U>> Start) or a numerical value
The variable is available in read (ThyVisor + communications interfaces)
External logical signal (input); may be a digital input command or an SW command
The variable is available in read (ThyVisor + communications interfaces)
Internal signal (e.g. state of the Breaker Failure signal relative to the second threshold of function 50)
The variable is not available in read (non-availability is indicated by the lack of an arrow)
AND and NAND logical ports
OR and NOR logical ports
Comparator block (e.g. tripping threshold U>>)
Calculation block (e.g. maximum phase current value)
Regulation (e.g. tripping threshold I>>)
The variable is available in read and can be set with ThyVisor + MMI
Commutator
Resettable timer with tripping delay
(tripping time tON)
Non-resettable timer with tripping delay
(tripping time tON)
Non-resettable timer with reset delay
(reset time tOFF)
Tripping characteristic (dependent/independent)
&
≥1
EXOR logical port
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