Y/N Transitions - Mitsubishi Electric R16MTCPU Programming Manual

3.10

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
Shift Y/N transition
WAIT Y/N transition
A Y/N transition is designed to describe the following two-route selective branch program easily.
[Y/N transition is not used]
IFB1
G0 G1
[Y/N transition is used]
IFB1
G0
Symbol
(Not
completion
of condition)
Gn
N
Y
(Completion
of condition)
(Not
completion
of condition)
Gn
N
Y
(Completion
of condition)
G0 and G1 programs should be different only in
acknowledgement/negation of the conditional expressions.
(Example 1)
[G 0] [G 0]
M0 !M0
(Example 2)
[G 0] [G 0]
D0!=K100 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
G0
Function
• 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".
G1
3 MOTION SFC PROGRAMS
111
3.10 Y/N Transitions
3