Delta DVP-ES2 User Manual download pdf (Page 13)

1. PLC Concepts

1-5

1.5 Ladder Logic Symbols

The following table displays list of WPLSoft symbols their description, command, and memory

registers that are able to use the symbol.

Ladder Diagram

Structure

Explanation Instruction Available Devices

NO (Normally Open)

contact / A contact

LD X, Y, M, S, T, C

NC (Normally Closed)

contact / B contact

LDI X, Y, M, S, T, C

NO contact in series

AND X, Y, M, S, T, C

NC contact in series

ANI X, Y, M, S, T, C

NO contact in parallel

OR X, Y, M, S, T, C

NC contact in parallel

ORI X, Y, M, S, T, C

Rising-edge trigger

switch

LDP X, Y, M, S, T, C

Falling-edge trigger

switch

LDF X, Y, M, S, T, C

Rising-edge trigger in

series

ANDP X, Y, M, S, T, C

Falling-edge trigger in

series

ANDF X, Y, M, S, T, C

Rising-edge trigger in

parallel

ORP X, Y, M, S, T, C

Falling-edge trigger in

parallel

ORF X, Y, M, S, T, C

Block in series

ANB None

Block in parallel

ORB None

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 701 702

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