MAINTENANCE CIRCUIT

PROBLEM TO BE SOLVED: To improve the efficiency of maintenance work by making it unnecessary to install a communicating telephone laid between a central operation room and a site and conventionally required for maintenance work. SOLUTION: In a controller maintenance circuit constituted of a computer...

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Bibliographic Details
Main Author MAEKAWA YOSHIZO
Format Patent
LanguageEnglish
Published 09.02.2001
Edition7
Subjects
CONTROL OR REGULATING SYSTEMS IN GENERAL
CONTROLLING
FUNCTIONAL ELEMENTS OF SUCH SYSTEMS
MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS
PHYSICS
REGULATING
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Summary:PROBLEM TO BE SOLVED: To improve the efficiency of maintenance work by making it unnecessary to install a communicating telephone laid between a central operation room and a site and conventionally required for maintenance work. SOLUTION: In a controller maintenance circuit constituted of a computer 1 for executing control and plural remote PI/O substrates 22 connected through a network or a private line and capable of inputting a sensor signal, driving an actuator or the like, each PI/O substrate 22 is provided with a switch 23 for generating a maintenance request signal to the computer and a display 25 for permitting each PI/O substrate 22 to execute maintenance work after completion of signal isolation work necessary for the maintenance request from the substrate 22 to the computer 1 side.
Bibliography:Application Number: JP19990203032