Momentum Modbus Plus 170 PNT Series Guide de l'utilisateur Page 360

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Vue de la page 359
Ladder Logic Elements and Instructions
360
870USE10110 July 2004
Standard Ladder Logic Elements for M1 Processor Adapters
Ladder Logic
Symbols
The table below provides the meaning of standard ladder logic symbols.
Symbol Meaning Nodes
Consumed
Normally open (N.O.) contact 1
Normally closed (N.C.) contact 1
Positive transitional (P.T.) contact 1
Negative transitional (N.T.) contact 1
Normal coil 1
Memory-retentive or latched coil; the two symbols mean the
same thing, and the user may select the preferred version for
online display.
1
Horizontal short 1
Vertical short 0
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