Peer-to-peer register exchange controller for industrial program

Details Peer-to-peer register exchange controller for industrial program Peer-to-peer register exchange controller for industrial program

1988-10-17

1991-02-12

Ruggiero, Joseph

Boots, shoes, and leggings

364140, 364900, 3649269, 3649314, 3649421, 364949, 364951, G06F 1546, G06F 1516

Patent

active

049929267

ABSTRACT:
A communication network for programmable logic controllers (PLC) wherein selected memory means of each PLC has at least two ports directly accessible by other PLC and certain registers of the PLC are identical. Each PLC further has an interblock gap timer to signal the PLC when its transmit time slice is to occur. The time slice consists of a block transmit time and an interblock gap time. The total update time has been optimized to engable efficient, high-speed transfer of blocks of data between the PLCs.

REFERENCES:
patent: 4304001 (1981-12-01), Cope
patent: 4550366 (1985-10-01), Toyama et al.
patent: 4570257 (1986-02-01), Olson et al.
patent: 4607256 (1986-08-01), Henzel
patent: 4608661 (1986-08-01), Sasaki
patent: 4680753 (1987-07-01), Fulton et al.

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