Abstract
Fully utilizing programmable sequence controllers, interlock systems for the Photon Factory beamlines were newly designed and constructed for providing the reliable and versatile control logic that is required for beamline characteristics. The systems, accommodated with radiation safety and vacuum interlock logic as well as protection logic for various components against heat and radiation damage, are in operation on eight beamlines. A centralized monitoring system, to which all interlock systems for the beamlines are connected through optical fiber links, was constructed for simultaneously monitoring the operation status of the interlock systems. Individual operations of each interlock system are also controlled by the monitoring system. Log data collected by the monitoring system are summarized and analyzed in order to provide the necessary information for smooth and safe operation as well as for further improvements of the beamlines. The interlock and the monitoring systems are described along with operational remarks.
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