User manual

Implementing a Basic Application

SR2MAN01 11/2007 155

Notation Used by the Smart Relay

Description The smart relay has a four line display used to show ladder diagrams.

Equivalencies

Between

Notations

In the table below are the equivalencies between representations of the most

common elements of the ladder language, in the 3 formats:

Note: The programming software allows you represent ladder diagrams in three

different formats:

z Electrical symbols,

z Ladder symbols,

z Smart relay symbols,

Electrical symbol Ladder symbol Smart relay symbols

"O" "C"

I1 or i1

[Q1

Set coil (SET)

SQ1

Reset coil (RESET)

RQ1

14 13

22 21

A2 A1