SAFETY RELAY SYSTEM, GROUPING OUTPUT UNIT FOR SAFETY RELAY SYSTEM, AND CONTROL METHOD FOR SAFETY RELAY

摘要

PROBLEM TO BE SOLVED: To provide a safety relay system capable of stopping the other devices related to a specified device when the specified device is brought into a state in which safety cannot be secured and stopped. SOLUTION: This safety relay system is so related beforehand that when an external connection device is brought into a non-drive state based on input conditions, the other external connection devices interlockingly brought into the non-drive state is brought into the non-drive state and when the other external connection device is brought into a non-drive state, the external connection device is interlockingly brought into a non-drive state. The system comprises a local input for inputting safety information on the external connection device and a global input for inputting safety information on the other external connection devices interlocked with the non-drive of the other external connection devices to bring the external connection device into the non-drive state. The system also comprises a local output for outputting drive/non-drive signals to the external connection device based on the safety information on the external connection device and a global output for outputting drive/non-drive signals to the other external connection devices interlockingly linked to the non-drive of the external connection device. COPYRIGHT: (C)2005,JPO&NCIPI