Direct interface between fuel pump and computer cash/register

Details Direct interface between fuel pump and computer cash/register Direct interface between fuel pump and computer cash/register

1993-06-18

1994-03-29

Smith, Jerry

Boots, shoes, and leggings

222 52, G06F 1520, B67D 508

Patent

active

052991350

ABSTRACT:
An interface unit for interfacing a peripheral bus of a computer system with a dispensing system for dispensing a material, such as gasoline, and which includes a plurality of dispensers for controlling the dispensing of the material. The interface unit includes a controller and a first communication link for providing bidirectional communication between the controller and the material dispensers. A second communication link is connected with an internal bus on the interface unit and the peripheral bus of the computer system to provide bidirectional communication between the controller and the computer system. The second communication link includes a window memory for storing code and a bus interface. The bus interface includes an access control port for communicating access codes between the peripheral bus and the controller and a memory control for selectively connecting either the internal bus or the peripheral bus with the window memory in a manner that only one of the controllers and the peripheral bus may access the window memory at a time. A database of dispensing data collected from the plurality of dispensers is defined in a controller memory. Polling commands are sent from the controller to the dispensers and responses are collected over the first communication link. The controller is programmed to repetitively generate polling commands for the dispensers and to update the database with resulting responses. Inquiry commands are served from the computer system to the database for retrieving from the database data that is responsive to the inquiry commands.

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Options and Listings sheet entitled "Bennett PC-300 Electronic Pump Controller," published by Bennett Pump Company in the U.S., 1985, (no month).
Installation, Service Manual and Parts List entitled "PC-300 Electronic Pump Controller 1 to 32 Hoses," published by Bennett Pump Company in the U.S., 1985 (no month).
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Manager's Manual entitled "Access 410/430 System," published by Bennett Pump Company in the U.S., 1988, (no month).
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IEEE Standard 796-1983 entitled "Microcomputer System Bus," published by the Institute of Electrical and Electronic Engineers, Inc. in the U.S., Dec. 29, 1983.

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