Mitsubishi Electronics Q173CPU(N) ユーザーズマニュアル

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6 MOTION SFC PROGRAMS

6.10 Y/N Transitions

When routes are branch at a transition condition enables and disable, "Shift Y/N
transition" or "WAIT Y/N transition" will be useful.

Name Symbol

Function

Shift Y/N

transition

(Not
completion
of condition)

(Completion
of condition)

WAIT Y/N

transition

(Completion

of condition)

(Not
completion
of condition)

• When a transition condition set at Gn

enables, execution shifts to the lower
step. When that condition disables,
execution shifts to the right-connected
step.

• Differences between "Shift Y/N" and

"WAIT Y/N" are the same as those
between "Shift" and "WAIT".

A Y/N transition is designed to describe the following two-route selective branch
program easily.

• G0 and G1 programs should be different only in

acknowledgement/negation of the conditional expressions.
(Example 1)

(Example 2)

IFB1

[G 0]

[G 1]

!M0

[G 0]

D0!=K100

[G 1]

D0=K100

• Set the G0 program shown in above (Example 1) or (Example

2) as a G0 program.

• The Motion SFC program list codes after conversion are the

same as in the conventional description (different only in the
Motion SFC chart representation). Therefore, "automatic
search for free G number automatic generation of program
which conditional expression part is logically negated" is
performed during program editing to occupy two G programs.
Using "Program editor" to delete a Y/N transition does not
delete the automatically generated G program (G1 below).
Use "Program use list" to delete that program.

IFB1