Commissioning The Controller For Lonworks Communication; Troubleshooting Lonworks Communication - Carrier RTU Open v5 Integration Manual

Communications wiring

Commissioning the controller for LonWorks communication

Before a device can communicate on a LonWorks network, it must be commissioned. Commissioning allows the
system integrator to associate the device hardware with the LonWorks system's network layout diagram. This is
done using the device's unique Neuron ID.
A network management tool such as Echelon's LonMaker is used to commission each device, as well as, to assign
addressing. Specific instructions regarding the commissioning of LonWorks devices should be obtained from
documentation supplied with the LonWorks Network Management Tool.
When a new device is first commissioned onto the LonWorks network, the system integrator must upload the
device's External Interface File (XIF) information. LonWorks uses the XIF to determine the points (network
variables) that are available from a device. The RTU Open has a set of predefined network variables. These
variables can be bound or accessed by the Network Management Tool.
The Browse feature of the Network Management Tool allows you to read real-time values from the RTU Open. The
Network Management Tool allows you to test integration prior to binding the controller's network variables to other
LonWorks nodes.

Troubleshooting LonWorks communication

The most common communication problems result from not properly following the configuration steps outlined
above in this manual. Review all of the steps and use the following list to check your settings.
Verify accuracy of the following:
Hardware settings for speaking LonWorks (8 Data bits, No Parity, and 1 Stop bit):

Baud rate DIP switches 1 and 2 set to 38.4 kbps

Protocol DIP switches DS3 - DS6

LON network terminated on LonWorks Option Card pins 1 and 2

The BAS is connected properly to the LonWorks Option Card's 2-wire TP/FT-10 Net port, which is polarity
insensitive. The BAS may have to configure jumper or DIP switches on their end to support TP/FT-10.
NOTES

If RX LED is solid, then the terminations are incorrect.

If the network has greater than 32 devices or exceeds 2,000 feet, a Repeater should be installed.

If a controller begins or ends a network segment, a terminating resistor may be needed.

The RTU Open must be properly commissioned onto the LonWorks network. See Commissioning the
controller for LonWorks communication (page 18).

The BAS must be connected properly to the LonWorks Option Card's 2-wire TP/FT-10 Net port, which is
polarity insensitive.
Software settings defined through the Equipment Touch device. To confirm settings, obtain a Modstat of the
device. On the Equipment Touch, click the link to the Modstat.
RTU Open v5
Integration Guide
18
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