American Standard Inc.

Trane International Inc.

Patrick J Wilson

Paul C Rentmeester

Robert E Krocker

Robert M Swanson

Merle A Renaud

Tony J Wood

Terence D Baier

Mark E Nurczyk

Kirk W Johnson

A system for servicing a computer controlled machine comprising: a computer controlled machine including a device operable to perform a function, a controller controlling the operation of that device, and a data access port for transferring data and commands from the controller; and a service tool operably connected to the data access port, the service tool including a remote communications capability, a computer, and diagnostics and graphing software; and an expert observer system operably linked to the remote communications capability of the service tool and including historical machine data, machine sales information, software revisions for the controller, additional diagnostics software, and an expert observer capable of providing a mentor capability to the operator of a service tool.

HVAC service tool with internet capability

A microprocessor-based frequency shift keying (FSK) data communications module. The microprocessor selectively modulates and demodulates data directly in terms of a square wave pulse train in which a first frequency is used to convey a binary '1' and a second frequency to convey a binary '0'. An input and an output port on the microprocessor are selectively coupled to a transmission line through a transformer, by means of electronic switches. Also included are a bandpass filter for shaping the square waves into sine waves and for filtering noise, and means including a notch filter for generating a carrier detect signal input to the microprocessor, when incoming data is detected on the transmission line. Many of the components in the module are used for both transmitting and receiving data.

Microprocessor FSK data communications module

Growing community of inventors

La Crosse, WI, United States of America

Patrick J Wilson