Control system for securely protecting a control program when editing, executing and transmitting the control program

• Main Author: Katsuta Takao
• Format: Patent
• Language: English
• Published: 19.09.2017
• Subjects: CALCULATING; COMPUTING; CONTROL OR REGULATING SYSTEMS IN GENERAL; CONTROLLING; COUNTING; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRIC DIGITAL DATA PROCESSING; ELECTRICITY; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS; PHYSICS; REGULATING; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

A control system which protects a control program securely and improves a convenience for a particular user in reading and writing an execution-use control program from and into a PLC. The control system includes: a controller which controls a production apparatus; a development-use computer which converts a control program that describes control of the production apparatus, into the execution-use control program that can be executed by the controller, and encrypts the execution-use control program converted, thus generating an edit-use key for editing and an execution-use key for execution; and a management server which manages information on the user. The development-use computer registers the edit-use key in a user management table of the management server, and transmits the execution-use key and the execution-use control program to the controller.