ONICON D-100 BACnet - Manual (Page 24)

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D-100 Display Module BACnet Installation and Operation Guide 05/14 - 0635-6 / 18341
Page 24
Reported Problem Possible Solutions
Network communications are
disrupted when the device is
connected. • The RS485 network cable connections are polarity
sensitive and must be connected the same way on
every device (i.e. + to + and - to -). (See section 1.4.1 of
this manual for details.)
• Is the transmit LED flashing? The transmit LED will
only flash when the device is responding to a poll.
A unique address is required for each device on the
network. Duplicate addresses will cause some or all
of the devices on the network to quit working. (See
section 1.6.1 of this manual for details.)
• A unique IP address is required for each device on
TCP/IP networks. Duplicate addresses will cause
multiple devices to respond to the same poll. This will
cause some or all of the devices on the network to quit
working. (See section 1.6.2 of this manual for details.)
Network communications are
disrupted when the device is
connected (cont.). • Shield drain connections should be daisy
• chained in the same manner as the
• signal cables for RS485. The shield drain
• wire should be left unterminated at the
• end of the cable and connected to earth
• only at the network master controller.
• Shield wires must not be connected to the
• RS485 connector on the D-100.