Lonworks - United Technologies Carrier Unit Vent Open Integration Manual


Jumper set to EIA-485

Proper connection wiring

Unique rotary address switches 1 – 99. If controllers have duplicate addresses, network communication can
be lost.
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 controller recognizes physical changes (DIP switches, rotary switches, and jumpers) upon power up.
Modbus Exception Codes that might be returned from this controller
Codes
01
02
04

LonWorks

WARNING
When you handle the LonWorks Option Card:

Do not contaminate the printed circuit board with fingerprints, moisture, or any foreign material.

Do not touch components or leads.

Handle the board by its edges.

Isolate from high voltage or electrostatic discharge.

Ensure that you are properly grounded.
Unit Ventilator
Integration Guide
Name Description
Illegal Function The Modbus function code used in the query is not
supported by the controller.
Illegal Data The register address used in the query is not supported
Address by the controller.
Slave Device The Modbus Master has attempted to write to a non-
Failure existent register or a read-only register in the
controller.
13
Communications wiring
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