Browse Prior Art Database

Controller-To-Controller Loop Inter-connect

IP.com Disclosure Number: IPCOM000048654D
Original Publication Date: 1982-Feb-01
Included in the Prior Art Database: 2005-Feb-09
Document File: 2 page(s) / 43K

Publishing Venue

IBM

Related People

Sawtschenko, AP: AUTHOR [+2]

Abstract

This article describes a loop configuration in which a master controller and a slave controller are interconnected through the master controller loop. The slave controller controls its own loop.

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Controller-To-Controller Loop Inter-connect

This article describes a loop configuration in which a master controller and a slave controller are interconnected through the master controller loop. The slave controller controls its own loop.

Master controller 10 includes a primary loop adapter 12 to which a plurality of terminals 14A through 14E are connected through a closed loop. Most of the terminals 14A through 14E may be data input/output devices, such as point of sale terminals or printers. However, one or more of the terminals may be a slave controller, of which 14B is one example. The slave controller 14B is connected to the master controller loop through a secondary loop adapter 16 and to its own loop through a primary loop adapter 18. The terminals 20A through 20E, like the terminals 14A through 14E, may be data input/output devices or perhaps controllers for a tertiary loop of terminal devices.

The master and slave controllers operate independently of each other with each controller performing its designated functions and providing support for its connected loop. From the master controller's point of view, the slave controller appears like any other terminal in its loop. However, the two controllers provide a communications facility between an application program in the master controller and an application program in the slave controller, permitting the slave controller to consolidate system data before transmitting it to the master controller.

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