| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a timing synchronizing means between dual processors for performing a safety function highly reliably. <P>SOLUTION: In the safety control system having a safety device which performs the safety function to output a stop command to a power converter and other operation related to safety with a first processor and a second processor, the first processor and the second processor include timing synchronizing means for mutually transferring external interruption signals to the other party processor generated with transmission timing or reception timing of safety data periodically transmitted. The timing synchronizing means monitors an active time in which interruption occurred by a synchronizing signal stays in an active state and an activation interval to be a generation cycle of the interruption signal and performs predetermined safety processing only when the active time and the activation interval are within a set threshold range. <P>COPYRIGHT: (C)2012,JPO&INPIT |
