IL17574C
Page 6-4
Effective Date: 2/04
IQ 300
Page 6-4
Effective Date: 2/04
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IQ 3 0 0 T ro u b le s h o o tin g G u id e
S y m p to m
P ro b a b le C a u s e
P o s s ib le S o lu tio n
O n e o r m o re v o lta g e
p h a s e s re a d
in c o rre c tly
•
In c o rre c t P T
ra tio
•
C h e c k P t ra tio u s in g th e V ie w
S e tp o in ts s c re e n o f th e d is p la y
m o d u le . A d ju s t if in c o rre c t u s in g th e
e d it s e tp o in ts s c re e n .
In c o rre c t o r z e ro
c u rre n t re a d in g s
•
In c o rre c t C T
ra tio
•
C h e c k C T ra tio u s in g th e V ie w
S e tp o in ts s c re e n o f th e d is p la y
m o d u le . A d ju s t if in c o rre c t u s in g th e
e d it s e tp o in ts s c re e n .
In c o rre c t P o w e r
re a d in g s
•
In c o rre c t
p h a s in g o f v o lta g e
a n d (o r) c u rre n ts
•
C h e c k p h a s in g a n d v e rify
c o n n e c tio n s w ith w irin g d ia g ra m s .
U n it fa ils to
c o m m u n ic a te o v e r
P o w e rN e t n e tw o rk
•
W ro n g o r
c o n flic tin g a d d re s s
s e t fo r IQ 3 2 0
•
In c o rre c t b a u d
ra te s e t fo r th e
IQ 3 2 0
•
C o m m u n ic a tio n
w irin g e rro r
•
C h e c k th e a d d re s s o f th e IQ 3 2 0
b a s e u n it v ia a d is p la y m o d u le a n d
v e rify th a t th e s o ftw a re is a d d re s s in g
th e p ro p e r u n it.
•
C h e c k th e b a u d ra te s e t fo r th e
b a s e u n it v ia a d is p la y m o d u le a n d
v e rify th a t it is th e s a m e a s th e s y s te m
ra te .
•
V e rify th a t w irin g c o n fo rm s to
p ro p e r w irin g b a s e ru le s . (s e e T D
1 7 5 1 3 )
D is p la y m o d u le L C D
s c re e n is b la n k
•
C o n tra s t is s e t
to o lo w
•
P o w e r to
d is p la y m o d u le is
a b s e n t
•
P re s s a n d h o ld th e E N T E R b u tto n
th e p re s s a n d h o ld th e “d o w n ” s c ro ll
b u tto n to a d ju s t th e c o n tra s t.
•
C h e c k C a te g o ry 5 c a b le
c o n n e c tio n to d is p la y m o d u le a n d
b a s e u n it. C h e c k c o n tro l p o w e r fu s e s ,
w irin g c o n n e c tio n s , a n d v o lta g e le v e l.
D is p la y m o d u le
d is p la y s a s te ris k s in
p la c e o f n u m b e rs
•
P ro c e s s o r n o t
re s p o n d in g to
d is p la y
•
F a u lty C a te g o ry
5 c a b le
•
E x c e s s iv e
M o d b u s
c o m m u n ic a tio n s
•
P ro c e s s o r fa ilu re re q u ire s fa c to ry
re p a ir.
•
R e p a ir o r re p la c e C a te g o ry 5 c a b le .
•
R e d u c e M o d b u s c o m m u n ic a tio n s .
D ig ita l in p u t fa ilu re
•
H e a v y M o d b u s
c o m m u n ic a tio n s
•
R e d u c e M o d b u s c o m m u n ic a tio n s ,
re fe r to S e c tio n 3 .3 .5
Table 6.1 Troubleshooting Guide
