YASKAWA USAREM-A5A Bulletin page 34

6 . 6 L E D I N D I C AT I O N
LED M A I N i n c o r p o r a t e d c i r c u i t p r o t e c t o r a n d
7- s e g m e n t L E D s h o w s t a t u s o f S E R V O PA C K a n d
a l a r m .
Table 6 3 L E D Status Indications
Status of SERVOPACK
Control Power Applied
Main Power Applied
Base Current Interrupted
Current Conducting
(Normal Operation)
P Side Overtravel
N Side Overtravel
Table 6 4 A l a r m Display and Alarm Output Code
(SVALM and 3 -bit Output)
Display Code
Specifications
(LED) No
I I - I
Normal 8
OC ' ,
1
MCCB 2
2
RG 3
3
OV 4 4
151
OS
5
r C-
PG
UV 6
S
OL 'I 7
_
CPU
0
A/D
b
0 O u t p u t transistor is turned ON
X O u t p u t transistor is turned OFF
6 . 7 P R E C A U T I O N S FOR A P P L I C AT I O N
6 7 1 M i n u s Load
T h e m o t o r i s r o t a t e d b y t h e l o a d ; i t i s i m p o s s i -
ble t o a p p l y b r a k e ( r e g e n e r a t i v e b r a k e ) a g a i n s t
t h i s r o t a t i o n a n d a c h i e v e c o n t i n u o u s r u n n i n g .
Example: D r i v i n g a m o t o r t o l o w e r o b j e c t s
( w i t h n o c o u n t e r w e i g h t )
Since S E R V O PA C K h a s t h e r e g e n e r a t i v e b r a k e
c a p a b i l i t y o f s h o r t t i m e ( c o r r e s p o n d i n g t o
m o t o r s t o p p i n g t i m e ) , f o r a p p l i c a t i o n t o a m i n u s
l o a d , c o n t a c t y o u r YA S K A W A r e p r e s e n t a t i v e .
Indication
Any indications of 7-segment LED
is lit
MAIN L E D inside MCCB is lit
- i s lit
is lit
7-segment
LED
IQ 1 is lit
I n I is lit
Output Output Output
SVALM
1 2 3
x x x
0
X X
x x
0
x
0 0
X X
0
x
0
0
x Q
0
0
0
0
x x X
6 7 2 L o a d Inertia JL (GDO
T h e a l l o w a b l e l o a d i n e r t i a JL ( G M c o n v e r t e d t o t h e
motor s h a f t m u s t b e w i t h i n t e n t i m e s t h e i n e r t i a
o f t h e a p p l i c a b l e A C S E R V O M O T O R . I f t h e a l l o w -
able i n e r t i a i s e x c e e d e d , a n o v e r v o l t a g e a l a r m m a y
be g i v e n d u r i n g d e c e l e r a t i o n . I f t h i s o c c u r s ,
t a k e t h e f o l l o w i n g a c t i o n s :
• R e d u c e t h e c u r r e n t l i m i t .
• S l o w d o w n t h e d e c e l e r a t i o n c u r v e .
• D e c r e a s e t h e m a x i m u m s p e e d .
F o r d e t a i l s , c o n t a c t y o u r YA S K A W A r e p r e s e n -
t a t i v e .
6 7 3 H i g h Vo l t a g e L i n e
I f t h e s u p p l y v o l t a g e i s 4 0 0 / 4 4 0 V , t h e v o l t a g e
m u s t b e d r o p p e d , t h r e e - p h a s e 4 0 0 / 4 4 0 V t o
s i n g l e - p h a s e 2 0 0 V o r 1 0 0 V b y u s i n g a p o w e r
t r a n s f o r m e r. T a b l e 6 . 6 s h o w s t h e t r a n s f o r m e r
s e l e c t i o n . C o n n e c t i o n s h o u l d b e m a d e s o t h a t
the p o w e r i s s u p p l i e d a n d c u t t h r o u g h t h e p r i -
m a r y ( o r s e c o n d a r y ) s i d e o f t h e t r a n s f o r m e r .
6 . 8 P R E C A U T I O N S O F O P E R AT I O N
0
6 8 1 N o i s e Control
X
SERVOFACK u s e s i s a p o w e r t r a n s i s t o r i n t h e
x
main c i r c u i t . W h e n t h e s e d t r a n s i s t o r s a r e
s w i t c h e d , t h e e f f e c t o f l - o r —d:= ( s w i t c h i n g n o i s e )
x
may s o m e t i m e s o c c u r d e p e n d i n g o n t h e w i r i n g o r
x g r o u n d i n g m e t h o d .
The SERVOPACK i n c o r p o r a t e s C P U .
q u i r e s w i r i n g a n d t r e a t m e n t t o p r e v e n t
x
t e r f e r e n c e . T o r e d u c e s w i t c h i n g n o i s e
as p o s s i b l e , t h e r e c o m m e n d e d m e t h o d
x
a n d g r o u n d i n g i s s h o w n i n F i g . 6 . 1 4 .
x
(1) G r o u n d i n g m e t h o d ( F i g . 6 . 1 4 )
Motor f r a m e g r o u n d i n g
X
When t h e m o t o r i s a t t h e m a c h i n e s i d e a n d
g r o u n d e d t h r o u g h t h e f r a m e , C f
f l o w s f r o m t h e P W M p o w e r t h r o u g h t h e f l o a t -
i n g - c a p a c i t y o f - t h e m o t o r . T o p r e v e n t t h i s
e f f e c t o f c u r r e n t , m o t o r g r o u n d t e r m i n a l
( m o t o r f r a m e ) s h o u l d b e c o n n e c t e d t o t e r m i n a l
,Z of S R E V O PA C K . ( Te r m i n a l 8 o f S E R V O PA C K
s h o u l d b e d i r e c t l y g r o u n d e d . )
S E RV O PA C K S G 0 V
Noise m a y r e m a i n i n t h e i n p u t s i g n a l l i n e , s o
make s u r e t o g r o u n d S G 0 V . W h e n m o t o r
w i r i n g i s c o n t a i n e d i n m e t a l c o n d u i t s , t h e c o n -
d u i t s a n d b o x e s m u s t b e g r o u n d e d . T h e a b o v e
g r o u n d i n g u s e s o n e - p o i n t g r o u n d i n g .
t h e
— 27 —
T h i s r e -
noise i n -
as m u c h
o f w i r i n g
c u r r e n t
d
0