Dahua DH-SD6323E-H, Installation Manual

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21
Figure 7-2
7.4 RS485 Bus FAQ
Phenomenon Possible Reasons Solution
Speed dome
can run self-
diagnosis but I
can not control
it.

Host address(baud rate) and
speed dome address(baud rate)
are not match;

Positive and negative end of
RS485 Bus are misconnected;

Connection cable is loose
；

RS485 Bus connection are cut
off;

Modify host or speed dome setup
；

Switch RS485 positive end and
negative end
；

Fix connection cable firmly
；

Replace RS485 Bus.
I can control
the speed
dome but is not
smooth

RS485 Bus connection are not
good
；

One RS485 bus is off
；

The distance between host and
speed dome is too far
；

Parallel connected too much
speed domes.

Connect RS 485 Bus again
；

Replace RS485 Bus
；

Add terminal matching resistance
；

Add RS485 distributor.
Note

This manual is for reference only. Slight difference may be found in the user
interface.

All the designs and software here are subject to change without prior written
notice.

All trademarks and registered trademarks mentioned are the properties of their
respective
owners.

If there is any uncertainty or controversy, please refer to the final explanation of us.

Please visit our website or contact your local service engineer for more
information.