7
vacon • 46
Fault tracing
Local contacts: http://drives.danfoss.com/danfoss-drives/local-contacts/
7.3
Other fault conditions
The following fault tracing diagram will help you to locate and fix some of the most usual problems.
If the problem persists contact your local distributor.
Figure 9. Fault tracing diagram for Modbus RTU
.
Ch
eck
cablin
g
Ch
eck
g
ro
u
n
di
n
g
9330.emf
N
o
co
m
m
u
n
ica
ti
o
n
Co
u
n
te
r
O
K
Po
o
r
co
m
m
un
ic
a
tion
Ch
eck
co
m
m
u
n
i-
ca
tion
st
at
us
(p
ar
.
5
.7.
3.
2.
1/5.
8.3
.2
.2
)
C
o
unt
e
r
d
oe
s
n
ot
ru
n
Co
un
te
r
fo
r
bad
fr
a
m
e
s
(se
e
Ta
bl
e
3)
in
cr
ea
se
s
Ch
e
ck
fie
ldbu
s
parame
te
rs
b
u
s
p
aram
eters
in
men
u
C
h
ec
k
o
th
er
fi
e
ld
-
Ch
e
ck
s
el
e
ct
e
d
pr
ot
oc
o
l
Ch
e
ck
te
rm
in
a
tio
n
re
s
is
to
rs
Ch
e
ck
that
b
o
th
en
ds
o
f
th
e
fi
e
ld
b
u
s
line
h
a
v
termi-
na
ti
on
re
si
st
or
s
(chapte
r
4
.4)
C
h
ec
k
p
a
ram
et
er
s
e
Is
th
e
d
e
vic
e
in
R
E
A
D
Y
sta
te
?
C
h
e
ck
M
as
te
r’
s
pa
ra
m
e
te
rs
Is
fi
eldb
us
se
le
ct
ed
as
co
ntr
o
l
p
lace
?
D
o
es
Ma
st
er
giv
e
RU
N
co
m
m
a
nd?
Ch
e
ck
cabl
in
g
Che
ck
term
inat
ion
re
s
is
to
rs
O
the
r
b
us
de
vi
ce
s
C
h
ec
k
conne
ct
ion
s
Ch
eck
th
e
le
d
o
n
keyp
a
d
Ch
eck
e
xt
e
rn
a
l
in
te
rl
o
ckin
g
s
(I/O)
Ch
e
ck
co
n
figu
ra
-
ti
on
s
(S
la
e
ad
d-
re
ss
,b
a
u
d
ra
te
e
tc
.)
v
Ch
eck
d
ist
a
n
ce
s
betw
e
e
n
ca
b
le
s,
se
e
ch
a
pt
er
4.
4.
Che
ck
cabl
e
ty
p
e
s,
se
e
ch
a
pt
er
3
.
Ch
eck
g
ro
u
n
di
n
g
,
se
e
chapter
4.
R
e
-
mem
b
er
to
ma
k
e
g
round
in
g
for
ea
ch
de
vic
e
!
Che
ck
te
rm
ina
ls
fo
r
lo
o
se
co
nne
ct
io
ns
Ch
ec
k
str
ip
pin
g
of
cab
les
and
cond
uc
to
rs
,s
ee
ch
ap
ter
4
.
Us
e
k
e
yp
a
d
to
m
o
n
ito
r
var
ia
bl
e
Ch
eck
that
b
oth
en
ds
of
th
fi
e
ldb
us
li
n
e
ha
ve
t
rmi
na
-
tion
re
sis
tor
s
(c
h
a
p
te
r
4.
4)
e
e
Ch
e
ck
cabl
e
fo
r
cu
ts
Check
cor
re
ct
plac
e-
me
nt
of
co
n
du
cto
rs
in
te
rminal
s
C
h
ec
k
o
th
er
ne
cess
a
ry
d
evice
s
(e
.g
.
ro
u
te
r)
Dr
iv
e
d
oe
s
n
ot
st
art
fr
o
m
the
b
u
s
Chec
k p
a
ra
m
e
ter
M
1
.15
o
r M3.2
.1
Summary of Contents for 100 INDUSTRIAL
Page 2: ......