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DVP-ES2-EX2-SS2-SA2-SX2-Operation Manual

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5. Sequential Function Chart<br />

Returning to<br />

SFC:<br />

Ladder diagram:<br />

the initial<br />

step in the<br />

same<br />

sequence.<br />

Jumping<br />

up/down to<br />

non-adjacent<br />

steps in the<br />

same<br />

sequence.<br />

OUT<br />

S0<br />

S21<br />

S24<br />

S25<br />

X7<br />

OUT<br />

X2<br />

S25 returns to the initial<br />

step S0 by using OUT.<br />

S0<br />

S<br />

S21<br />

S<br />

S23<br />

S<br />

S24<br />

S<br />

S25<br />

S<br />

X2<br />

X7<br />

Jump to another step<br />

of step<br />

Using OUT S24<br />

S24<br />

Return to initial step<br />

Using OUT S0<br />

S0<br />

RET<br />

Driving steps<br />

in different<br />

sequences.<br />

SFC:<br />

OUT<br />

S0<br />

S21<br />

S23<br />

OUT<br />

X2<br />

OUT<br />

S1<br />

S41<br />

S42<br />

S43<br />

Two different step sequence: S0 and S1<br />

S23 returns to initial step S0 by using OUT.<br />

S43 returns to initial step S1 by using OUT.<br />

Ladder diagram:<br />

S0<br />

S<br />

S21<br />

S<br />

S23<br />

S<br />

S1<br />

S<br />

S42<br />

S<br />

S43<br />

S<br />

X2<br />

Drive the step in<br />

different sequence<br />

Using OUT S42<br />

S42<br />

RET<br />

RET<br />

Step<br />

sequence<br />

initiated<br />

by S0<br />

Step<br />

sequence<br />

initiated<br />

by S1<br />

Cautions for Driving Output Point:<br />

Once LD or LDI instructions are written into the second line after the step point, the bus will not be<br />

able to connect output coils directly otherwise errors will occur when compiling the ladder diagram.<br />

The following diagram explains the methods for correcting the ladder ion correct diagram.<br />

Sn<br />

S<br />

BUS<br />

M0<br />

Y0<br />

Y1<br />

Y2<br />

Sn<br />

S<br />

M0<br />

Modify the<br />

position of M0.<br />

Y0<br />

Y2<br />

Y1<br />

or<br />

Sn<br />

S<br />

M0<br />

M1000<br />

Normally open<br />

contact in RUN<br />

mode<br />

Y0<br />

Y1<br />

Y2<br />

Restrictions on Using Certain Instructions:<br />

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

5-7

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