CPU OF PLC, SYSTEM PROGRAM FOR PLC, AND RECORDING MEDIUM STORING SYSTEM PROGRAM FOR PLC

• Main Authors: EGUCHI, SHIGEYUKI, HAMASAKI, OSAMU, NISHIYAMA, YOSHIHIDE, KOJIMA, TATSUYA
• Format: Patent
• Language: English; French; German
• Published: 14.05.2014
• Subjects: CALCULATING; COMPUTING; CONTROL OR REGULATING SYSTEMS IN GENERAL; CONTROLLING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS ORELEMENTS; PHYSICS; REGULATING

A system program causes, as an execution preparation process for a control operation of a PLC, execution of a process for producing a reception buffer for storing received input data, and execution of a process for producing, for each input data referred to by a control program, an input synchronization buffer used by the control program as a reference target for the input data. The system program causes, as an execution control process for the control operation of the PLC, execution of an input copy process for copying the received input data from the reception buffer to the input synchronization buffer corresponding to the input data, and execution of a control program start process for starting execution of the control program.