| 摘要 |
<P>PROBLEM TO BE SOLVED: To enable a control program to use at least received input data in an appropriate manner even when an input-output processing and a control program are not in one-to-one correspondence with each other without requiring the processing therefor by the control program itself. <P>SOLUTION: A system program executes, as an execution preparation processing of a control operation of a PLC, a processing for generating a reception buffer to store received input data in storage means and a processing for generating, for each of input data referred to by a control program, an input synchronization buffer made into the reference destination of the input data by the control program in the storage means. The system program executes, as an execution control processing of a control operation of the PLC, an input copy processing for copying the received input data on an input synchronization buffer corresponding to the input data from the reception buffer and a control program start processing for executing and starting the control program. <P>COPYRIGHT: (C)2013,JPO&INPIT |
