18-22 May 2015
1200 Molecular Plant Science Building, Michigan State University
EST5EDT timezone
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Contribution 15 minute contribution

1200 Molecular Plant Science Building, Michigan State University -

Paired Redundant IOCs with Redundant Hardware

Speakers

  • Dr. Scott BAILY

Primary authors

Co-authors

Abstract content

Last year we installed a dual redundant master timing system at LANSCE. A fiber-optic fanout concentrator module acts as a switch to select which timing generator is used to control the accelerator. Each generator consists of two IOCs, which must fail over as a pair. We modified the redundant IOC software from DESY to be able to synchronize some PVs but not others, and allow both IOCs to control hardware simultaneously. If the master stops generating timing signals, our software on the slave first commands the switch and then tells the IOCs to follow suit. I will discuss the modifications we made, and our experience in operating these IOCs.