LS-221-BL Technical Reference
Doc. #710220125
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d is a b le d . A ll d ig ita l o u tp u ts a re s h o rt c irc u it p ro te c te d . If a n y o f th e m is o v e rlo a d e d , a ll
o u tp u ts a re d is a b le d a n d O P F is s e t to lo g ic o n e . T o d is tin g u is h b e tw e e n th e tw o
re a s o n s , O P F s h o u ld b e c h e c k e d w ith a ll o u tp u ts re s e t. In th is c a s e o n ly m is s in g o r o u t
o f ra n g e o p e ra tin g p o w e r c a n a c tiv a te O P F . T h e c u rre n t O P F v a lu e is la tc h e d a s O P F L
a t th e m o m e n t th e s e rv o lo o p is b ro k e n .
R/W access
D7
D6
D5
D4
D3
D2
D1
D0
Base Addr + 0xB
Read
EMG
STP
MPF
OPF
EMGL
STPL
MPFL
OPFL
Table 7: OPF status
•
E m e rg e n c y S to p In p u t (E M G )
L S -2 2 1 -B L is e q u ip p e d w ith e m e rg e n c y s to p in p u t. T o o p e ra te L S -2 2 1 -B L , a n o rm a lly
c lo s e d c o n ta c t m u s t b e c o n n e c te d to th a t in p u t. O p e n in g th e c o n ta c t w ill im m e d ia te ly
d is a b le th e a m p lifie rs a n d a ll o u tp u ts a n d w ill s h u t o ff th e o u tb o u n d p o w e r s o u rc e s . If th e
e m e rg e n c y s to p is a c tiv a te d , E M G is s e t to lo g ic o n e , o th e rw is e is re s e t to lo g ic z e ro .
E M G is c o n tin u o u s ly a v a ila b le to th e h o s t a n d th e c u rre n t E M G v a lu e is la tc h e d a s
E M G L a t th e m o m e n t th e s e rv o lo o p is b ro k e n .
R/W access
D7
D6
D5
D4
D3
D2
D1
D0
Base Addr + 0xB
Read
EMG
STP
MPF
OPF
EMGL
STPL
MPFL
OPFL
Table 8: EMG status
•
S to p In p u ts (S T P ) (o p tio n a l)
S o m e o f th e g e n e ra l p u rp o s e in p u ts o r a s e le c te d c o m b in a tio n o f th e m c a n b e u s e d a s
a n a d d itio n a l e m e rg e n c y s to p . T h is is a c u s to m o p tio n a n d m a y b e in s ta lle d b y u s e r
re q u e s t. B y d e fa u lt it is n o t u s e d . W h e n th e o p tio n is in s ta lle d a n d s to p in p u t is a c tiv a te d ,
S T P is s e t to lo g ic o n e . U n d e r n o rm a l c o n d itio n s S T P is lo g ic z e ro . S T P is c o n tin u o u s ly
a v a ila b le to th e h o s t a n d th e c u rre n t S T P v a lu e is la tc h e d a s S T P L a t th e m o m e n t th e
s e rv o lo o p is b ro k e n .
R/W access
D7
D6
D5
D4
D3
D2
D1
D0
Base Addr + 0xB
Read
EMG
STP
MPF
OPF
EMGL
STPL
MPFL
OPFL
Table 9: STP status
•
C u rre n t L im it (C L )
W h e n o n e o r m o re o f th e p o w e r a m p lifie rs re a c h th e p ro g ra m m e d c u rre n t lim it th e
c o rre s p o n d in g C L s ig n a l is s e t to lo g ic o n e . O th e rw is e C L is lo g ic z e ro . C L 0 , C L 1
re p re s e n t th e c u rre n t o v e rlo a d re s p e c tiv e ly fo r c h a n n e l 0 , 1 . W h ile th e s e rv o lo o p is
c lo s e d (i.e . A E = 1 ), C L 0 a n d C L 1 s h o w th e a c tu a l s ta te s o f th e c u rre n t lim ita tio n fo r th e
c o rre s p o n d in g c h a n n e ls . If th e s e rv o lo o p is b ro k e n (i.e . A E = 0 ), C L 0 a n d C L 1 k e e p th e
C L v a lu e s fro m th e m o m e n t th e s e rv o w a s s h u t d o w n . B y re a d in g th e re g is te r th e h o s t
c a n d e te rm in e o v e rlo a d in g o f w h ic h c h a n n e l h a d c a u s e d th e p ro b le m .
R/W access
D7
D6
D5
D4
D3
D2
D1
D0
Base Addr + 0xA
Read
AE
RST
OPT
SPS
CL1
CL0
Table 10: CL status
