3xLOGIC VISIX Camera - Manual (Page 37)

Installation Manual
|
VISIX
PTZ
Network
Camera
10225 Westmoor Drive, Suite 300, Westminster, CO 80021 | www.3xlogic.com | (877) 3XLOGIC 37
Figure
A-­‐9
Star
Shape
Connection
For
such
case,
the
best
way
is
adding
a
RS485
distributor.
This
product
can
effectively
change
the
star-­‐shape
connection
to
which
satisfies
the
requirement
of
RS485
industry
standard,
in
order
to
avoid
those
problems
and
improve
the
communication
reliability.
Refer
to
the
following
figure.
Figure
A-­‐10
RS485
Distributor
! Troubleshooting
of
RS485
communication
Problem
Possible
Reasons
To
Solve
the
Problem
The
speed
dome
does
the
self-­‐test
action
but
cannot
be
controlled
remotely.
1.
The
address
or
baudrate
of
the
speed
dome
does
not
match
with
those
of
remote
control
device.
1.
Adjust
the
address
and
baudrate
of
the
remote
control
device
to
match
with
those
of
the
speed
dome.
2.
The
wire
RS485+
connects
to
the
interface
RS485-­‐
and
wire
RS485-­‐
connects
to
the
interface
RS485+.
2.
Connect
the
wire
RS485+
to
the
interface
RS485+
and
wire
RS485-­‐
to
the
interface
RS485-­‐.
3.
The
RS485
wire
is
disconnected.
3.
Reconnect
the
RS485
wire
tightly.
4.
RS485
wire
is
broken.
4.
Change
a
RS485
wire.
The
speed
dome
can
be
controlled
but
not
smoothly.
1.
The
connection
is
loose.
1.
Reconnect
the
RS485
wire
tightly.
2.
RS485+
or
RS485-­‐wire
is
broken.
2.
Change
a
RS485
wire.
3.
The
speed
dome
is
too
far
away
from
the
remote
control
device.
3.
Add
a
terminal
resistor.
4.
Too
many
speed
domes
are
connected.
4.
Add
a
RS485
distributor.
6#
主控
设备
1#
32#
15#
120Ω
120Ω
120Ω
1#
2#
16#
A+
B-
485分配器
Controller
Device
RS485
Distributor