The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 29, 1981
Filed:
Apr. 12, 1978
Lawrence W Hill, Arlington, MA (US);
Thomas J Stoodley III, Lowell, MA (US);
Ronald Malcolm, Andover, MA (US);
Modicon Div. Gould Inc., Andover, MA (US);
Abstract
A small, low cost, programmable controller is described capable of solving user programs represented in networks having up to seven rows and eleven columns. A column solver is utilized to provide efficient and fast solution of the user control network. The programmable controller also solves calculate functions having multiple outputs to facilitate use of the output information in the control program. A programming panel using a CRT display shows one or more selected control networks and, in conjunction with the central processing unit of the programmable controller, provides for the insertion of networks between two existing networks. Since the networks are solved by the controller mainframe in a sequential fashion, this network insertion allows the user to optimize his or her control program when solution order of the networks is important. The output coil numbers of network rows may also be assigned by the user independent of their placement in the control program to further facilitate programming the controller. The programming panel includes a movable cursor on the CRT display which, in conjunction with a light-emitting diode (LED), allows the user to monitor the real-time power flow at any particular point in the displayed ladder diagram network. Specialized search features can also be specified by the user to simplify monitoring and de-bugging the control program.