Abstract:
Dynamic operating conditions of a fluid logic integrated circuit module are shown on a front panel circuit schematic diagram with dynamic pressure indicators located for viewing at monitored schematic circuit positions to provide diagnostic information for servicing or monitoring a system sequence. The module comprises a sandwich array of two logic element plate layers with an intermediate taut flexible elastomer diaphragm layer common to a plurality of logic elements spaced on the two logic plates with mating cavity wells for the individual logic elements disposed on opposite sides of the diaphragm. Adjacent one logic element plate is the pressure indicator panel having a foam layer common with a plurality of indicator units, which are connected to preselected monitor points in the module to display the states of the elements and the pressure conditions of the supply fluid sources or input and output channels. A back panel includes a visual circuit connecting diagram for the particular custom circuit showing where to connect hoses between various modular access channels, so that the systems can be connected and put into service on-site by unskilled personnel. A set of indicators thus connected into any particular circuit design is set apart for viewing in position on a schematic circuit overlay on the front panel which blocks out the unused indicators in the module.
Abstract:
An on-line diagnostic system is provided working conjointly with but not interfering with the operation of a logically controlled industrial control system. Thus binary digital words are displayed at a centralized location for comparison with a scroll chart to indicate irregularities of operations by listing invalid words and to pinpoint correctional techniques with a predetermined servicing recommendation for invalid word combinations. In a preferred embodiment the system is a fluid controlled binary operated cyclic control system provided with logic elements interconnected for automatically progressing through a cyclic operation mode controlling flow paths for working fluid under pressure in a desired sequence to thereby perform a work function. The preferred fluid logic elements comprise a compartment separated into two chambers by a flexible diaphragm which is flexed by pressure differentials to block or open fluid flow paths through the respective chambers. Binary indications as to status of these flow paths are provided as pressure readings at a plurality of key flow path positions thereby producing the binary word information specifying the nature of malfunctions.
Abstract:
Pulse actuated binary fluid responsive logic elements are connected in a control system for a fluid flow network operating a fluid responsive mechanism. The logic elements are interconnected to respond to a trigger pulse and automatically sequence through a cycle of operation sensing and responding to fluid pressure conditions at control points in the flow network. A portion of the control points are monitored with diagnostic binary pressure indicators to indicate the status of the network during the control sequence by display of binary words. For correcting malfunctions a comparison chart indicates the nature of invalid words and the corresponding procedure for correcting the malfunctions sensing that word structure, thereby expediting servicing by semi-skilled personnel without detailed knowledge of the system operation.