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Data Entry Rules Make sure you respect the following rules when you enter a ladder diagram:

Rules

Incorrect

 

 

Correct

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Each coil must only be

 

 

 

 

 

 

 

 

 

 

 

 

 

I1-------------

[Q1

 

 

I1-------------

 

 

[Q1

 

entered once in the right

 

 

 

 

 

 

 

I2-I3----------

TT1

 

 

T1

 

 

 

 

hand column

 

 

 

 

 

 

 

 

T1-------------

[Q1

 

 

I2-I3

 

TT1

 

 

 

 

 

 

 

 

Z1

 

 

 

Z1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Elements used as

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

I1-------------

TT1

 

contacts may be entered

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

T1-------------

[Q1

 

as many times as

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

I3-T1

 

[M2

 

necessary in the 5 left

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

I1-M2

 

[Q2

 

hand columns.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Links must always run

 

 

 

 

 

 

 

 

 

 

 

 

 

I1-I2-I3

 

 

 

 

I1-I2-I3-------

[M1

 

from left to right.

 

 

 

 

 

 

 

 

--

 

 

 

 

M1----I4-I5-I6-[Q1

 

 

 

 

 

 

 

 

 

 

 

 

I4-I5-I6-[Q1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

If S coils (SET) are used in

If no R (Reset) coils are used,

An R (Reset) coil must be used

a diagram, also use an R

the corresponding coil will

for reset purposes.

 

 

(Reset) coil.

always be set to 1.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Note: Smart relays run programs from top to bottom and from left to right.

42

SR2MAN01 11/2007

Page 35
Image 35
Schneider Electric SR2MAN01 user manual M1----I4-I5-I6-Q1, Rules Incorrect Correct