Dat
e of
I
s
sue
04/
22/
2008
Par
t No.
194341
Optical data coupler LS611
Trouble shooting
24
10
Trouble shooting
10.1
General problems
Error
No.
Erro type
Indicators
Error reasons
Measures
Signal
RX TX PWR
1
No display
off
off
off
No operating volt-
age
2
No communica-
tion
Off or
red
off
on
Low reception
level, transfer
blocked
Alignment of the
opposite optical
data coupler
(cf.chapter 6.2.2)
3
Bar graph is not
extended com-
pletely despite
correct alignment
x
on
No error;
Individual scale
deviation in the
high-level range
No
4
Weak RX and/or
TX display
Normal
on
No error;
Intensity depends
on bus load and
baud rate
No
5
Signal display with
the opposite side
switched off
Yellow
on
LS611 is directed
precisely on the
reflector or on the
opposite station of
LS611
No, if bus opera-
tion is not dis-
turbed
Otherwise:
Increase axle
spacing to reflec-
tor; lower reflector
of LS611, if and
when required
PWR
PWR
RX TX
SIGNAL
