Mitsubishi MELSEC-K Instruction Manual page 86

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1 1 - 5
S t a r t
T h e r e a r e t h e f o l l o w i n g f i v e k i n d s o f p o s i t i o n i n g s t a r t :
( a )
I n d e p e n d e n t X - a x i s
s t a r t .
( b )
I n d e p e n d e n t Y - a x i s
s t a r t .
( c ) X - a x i s
z e r o p o i n t r e t u r n s t a r t .
( d )
Y - a x i s
z e r o p o i n t r e t u r n s t a r t .
( e )
I n t e r p o l a t i o n
s t a r t .
T h e s t a r t p r o g r a m e x a m p l e i s p o s s i b l e w i t h a n y o f t h e a b o v e
t y p e s , w i t h t h e f o l l o w i n g c o n d i t i o n s a s p r e r e q u i s i t e s
:
( 1 )
w i t h r e g a r d t o
( a ) a n d
( c ) a b o v e , t h e
s t a r t w i l l o c c u r
o n l y w h e n i n t e r p o l a t i o n s t a r t a n d X - a x i s
s t a r t , X - a x i s
z e r o
p o i n t r e t u r n s t a r t , a n d X - a x i s
BUSY a r e a l l i n t h e OFF s t a t u s .
( 2 )
W i t h r e g a r d t o
( b )
a n d
( d ) a b o v e , t h e s t a r t w i l l o c c u r
o n l y ' w h e n i n t e r p o l a t i o n s t a r t a n d Y - a x i s
s t a r t , Y - a x i s
z e r o p o i n t
r e t u r n
s t a r t ,
a n d
Y - a x i s
BUSY a r e a l l i n t h e OFF s t a t u s .
( 3 )
w i t h r e g a r d t o
( e ) a b o v e , t h e s t a r t w i l l o c c u r o n l y w h e n
c o n d i t i o n s ( 1 ) a n d
( 2 )
a b o v e a r e f u l f i l l e d .
( 4 )
A f t e r o u t p u t
o f t h e s t a r t s i g n a l f r o m t h e s e q u e n c e r , t h e
s t a r t c o m p l e t i o n s i g n a l i s o u t p u t w h e n t h e KD71 r e c e i v e s t h e
s t a r t s i g n a l , a n d c o n t i n u e s t o b e o u t p u t u n t i l t h e s t a r t s i g n a l
i s OFF.
( 5 )
D a t a n u m b e r s a r e s e t b e f o r e h a n d a t D20 f o r i n d e p e n d e n t
X - a x i s
s t a r t ,
D 2 1 f o r i n d e p e n d e n t Y - a x i s
s t a r t , a n d D 2 2 f o r
i n t e r p o l a t i o n
s t a r t .
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