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User Manual of Thermometric Bi-spectrum Network Positioning system
the RS485 industry standard so that it will lead to some problems such as signal
reflection, anti-jamming ability decline when the devices are faraway. At this time,
the positioning system will be uncontrollable, or self-running, etc.
32#
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.
Troubleshooting of RS485 communication
Problem
1. The address or baudrate of the
The
positioning
positioning system does not
match with those of remote
system
control device.
does the
self-test
2. The wire RS485+ connects to
action but
the interface RS485- and wire
cannot be
RS485- connects to the interface
controlled
RS485+.
remotely.
3. The RS485 wire is
© Hikvision
1#
Figure A-9 Star Shape Connection
RS485 Distributor
A+
B-
Figure A-10 RS485 Distributor
Possible Reasons
6#
Controller
15#
120Ω
1#
120Ω
2#
120Ω
16#
To Solve the Problem
1. Adjust the address and
baudrate of the remote control
device to match with those of the
positioning system.
2. Connect the wire RS485+ to the
interface RS485+ and wire RS485-
to the interface RS485-.
3. Reconnect the RS485 wire
135
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