Delta DVP-ES2/EX2/SS2/SA2/SX2/SE manual S24 OUT, Restrictions on Using Certain Instructions

5 . Sequential Function Chart

cReturning to the initial step in the same sequence.

dJumping up/down to non-adjacent steps in the same sequence.

SFC:

OUT S0

S21

X2

S24 OUT

S25

X7

S25 returns to the initial step S0 by using OUT.

Ladder diagram:

	S0		Jump to another step
	S		of step
S21			Using OUT S24
	S
		X2
S23			S24
	S
S24			Return to initial step
	S
S25			Using OUT S0
	S
		X7
			S0
			RET

e Driving steps

SFC: Ladder diagram:

in different

sequences.

OUT

S0

OUT

S1

S0 S

S21

Drive the step in different sequence

Using OUT S42 Step

S21

X2

S23

OUT

S41

S42

S43

S

S23

S

S1 S

S42

S

S43

		sequence
X2
	S42	initiated
		by S0
	RET
		Step
		sequence
		initiated

Two different step sequence: S0 and S1 S23 returns to initial step S0 by using OUT. S43 returns to initial step S1 by using OUT.

S

by S1

RET

Cautions for Driving Output Point:

Once LD or LDI instructions are written into the second line after the step point, the bus will not be able to connect output coils directly otherwise errors will occur when compiling the ladder diagram. The following diagram explains the methods for correcting the ladder ion correct diagram.

Sn

S

BUS

Y0

M0

Y1

Y2

Sn

S Y0

Y2 or

M0

Y1 Modify the position of M0.

Sn

S Y0

M0

Y1

M1000 Y2

Normally open contact in RUN mode

Restrictions on Using Certain Instructions:

Serial/parallel circuits or instructions in general ladder diagram are also applicable in step points of

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