Boots – shoes – and leggings
Patent
1979-01-09
1981-01-27
Ruggiero, Joseph F.
Boots, shoes, and leggings
364104, 364120, G06F 900, G06F 1546
Patent
active
042479010
ABSTRACT:
A programmable controller of the type used to solve relay ladder diagrams is taught. The programmable controller includes a memory into which is placed a digital representation of the rungs of the ladder diagram. The disposition of various switches and coils are periodically sampled by other portions of the programmable controller and stored in other memory locations. At appropriate times between sampling intervals, the various memory information are combined and provided to a relay line solver which comprises part of the programmable controller. The sequence in which the information is provided to the relay line solver is determined by the sequence of ladder diagram entry into the memory by the programmer. The sequence of entry is determined during the entry process in a real time frame by apparatus within the programming panel which utilizes the interconnection of contact information which is provided by the operator in the manipulation performed. The interconnection information is utilized to determine which contact is to be entered next in sequence. This information is supplied to the operator by way of a display or other suitable readout device so that movement to the appropriate next contact may be made each time for entry thereof.
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"PLC Programming & Operation"-Bulletin No. 1774, Allen-Bradley Company.
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"Logitrol Control"-General Electric Co., General Purpose Control Dept., Bloomington, Ill. 61701, Jan. 1977.
"CL8881 Programmable Controller Program Box-Square D Comp.", Jan. 1975, pp. 1-21, Milwaukee, Wis.
"ICP.sup..TM. Industrial Programmable Controller Memory Loader/Monitor _(L/M)", Industrial Solid State Controls, Inc., York, Pa., pp. 1-28, Jan. 1973.
Cherba David M.
Martin Jonathan F.
Moran M. J.
Ruggiero Joseph F.
Westinghouse Electric Corp.
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