Schneider Electric SR2MAN01 user manual Rules, Incorrect, Correct

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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