ONICON System-10 Dualnet - Manual (Page 28)

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System-10 Dual Network Interface Installation Guide 05/14 - 0972-1
Page 28
REPORTED PROBLEM POSSIBLE SOLUTIONS
Device will not communicate with
the network controller. (BACnet IP or
MODBUS TCP/IP output) • A unique IP address is required for each device on
IP network. Duplicate addresses will cause multiple
devices to respond to the same poll. (See section
1.7.2 of this manual for details.)
• Managed IP networks may require that a gateway IP
address be programmed into the ONICON IP device.
(See section 1.7.2 of this manual for details.)
Network communications are
disrupted when the device is
connected. (RS-485 Output) • The Baud rate setting must match the network Baud
rate. (See section 1.6.1 of this manual for details)
• Is the Receive LED flashing on the network board?
This LED will flash whenever there is traffic on the
network. If the LED is not flashing, look for an open
network cable.
• 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 1.7 of this manual for details.)
• 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 1.5
of this manual for details.)
• 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 System-10.
Network communications are
disrupted when the device is
connected. (BACnet IP or MODBUS
TCP/IP output) • A unique IP address is required for each device on
IP networks. Duplicate addresses will cause multiple
devices to respond to the same poll. This may cause
some of the devices on the network to quit working.
(See section 1.7.2 of this manual for details.)
Time out errors occur when polling
the device (MODBUS RS-485 or
MODBUS TCP/IP) • What registers are being polled? Polling for invalid
registers will slow the response time. The range of
valid integer registers is 40001-40068. The range of
valid floating point registers is 41003-41081.
• Resetting totals requires the network controller
to write a 1 to a register in our device. This takes
longer to accomplish than simply reading registers.
This can lead to time out issues. When dealing with
time out errors, temporarily extend the allowable
delay to see if the problem will go away.