Serial access memory cartridge for programmable logic controller

Details Serial access memory cartridge for programmable logic controller Serial access memory cartridge for programmable logic controller

1994-12-29

1997-08-19

Gossage, Glenn

Static information storage and retrieval

Magnetic bubbles

Guide structure

395431, 365 52, 365221, G06F 1300, G11C 1700

Patent

active

056597053

ABSTRACT:
A serial access, electrically erasable, programmable read-only memory (EEPROM) is used to store user program and data and is disposed in a memory cartridge. The memory cartridge cooperates a base or master Programmable Logic Controller (PLC) and may be used to download a program into one or more master PLC's, or to upload a program from a master PLC to memory cartridge. Each PLC may include at least one input terminal and at least one output terminal for receiving and transmitting signals, at least one microprocessor, at least one memory device, and a connector for accessing the at least one memory device.

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patent: 5430859 (1995-07-01), Norman et al.
patent: 5455911 (1995-10-01), Johansson
patent: 5485590 (1996-01-01), Hyatt et al.

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