# US 4,545,210 A · Electronic program control for a refrigeration unit

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- Number: US 4,545,210 A
- Document ID: US4545210A
- Status: Granted
- Kind: A
- Application number: 06/597,331
- Filed: 1984-04-06
- Granted: 1985-10-08
- Earliest claimed: 1984-04-06
- Assignees: Carrier Corporation
- Inventors: Richard G. Lord
- Web page: https://patentgrep.com/patent/US4545210A

## CPC

- F25B 49/02: for compression type machines, plants or systems
- G05B 19/106: {for selecting a program, variable or parameter}
- F25B 2400/06: Several compression cycles arranged in parallel
- F25B 2400/075: with parallel compressors
- G05B 2219/15011: Configuration of operating system
- G05B 2219/25092: Customized control features, configuration
- F25B: REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- G05B: CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS (systems for controlling or regulating non-electric variables G05D; systems for regulating electric or magnetic variables G05F; control devices or systems insofar as characterised by mechanical features only G05G)

## Abstract

Programmable headers with fixed jumpers are used at the input of a microprocessor to develop a binary code for use by the microprocessor to configure the microprocessor to the physical characteristics of an assembled refrigeration unit. The programmable header is programmed at the factory by selectively breaking the jumpers to develop the binary code. The programming of the microprocessor for accessory equipment can be performed by field service personnel by using small DIP switches to develop a binary code for the microprocessor.

## Claims

### Claim 1

A method of programming the electronic processor control board of a refrigeration unit at the final assembly of the unit which comprises:
determining the physical characteristics of the refrigeration unit;
arranging a configuration header having a plurality of conducting wires therethrough on the processor control board;
assigning each of said plurality of conducting wires to a preselected input of a microprocessor;
electrically connecting the assigned conducting wire to an input of a microprocessor; and
selectively developing a binary code for each input of the microprocessor by allowing or not allowing a signal through each conducting wire to be impressed on the input of the microprocessor to program the microprocessor to the determined physical characteristics of the refrigeration unit.

### Claim 2 (depends on 1)

A method as set forth in claim 1 further comprising the steps of:
electrically connecting at least one switch means to said microprocessor for each optional accessory added to the refrigeration unit whereby the switch means is set after final assembly of the unit to develop a binary code for the optional accessory.