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DOE Review 11 May 2005 Stephen A. Lewis

DOE Review 11 May 2005 Stephen A. Lewis. Vacuum Standards. Basic Approach. Gauges, valves, and controllers connect to PLC with analog wires PLC provides high-integrity single-sector and inter-sector control

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DOE Review 11 May 2005 Stephen A. Lewis

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  1. DOE Review11 May 2005Stephen A. Lewis Vacuum Standards

  2. Basic Approach • Gauges, valves, and controllers connect to PLC with analog wires • PLC provides high-integrity single-sector and inter-sector control • Technicians use portable console, controller panels, and optional valve panel for local operations • PLCs connect to IOCs with Ethernet/IP • Cat-5 wiring is physical star but logical bus • “Smart” controllers use serial to IOCs for auxiliary functions

  3. Basic Approach • PLC is distributed • Processor and some I/O in main chassis • Additional I/O in adapter/scanner cluster • All connect using Ethernet/IP—same Cat-5 wiring plant

  4. G G P V C C O Canonical Architecture <=Hardware-to-PLC: analog PLC I/O <=PLC-to-IOC & PLC-to-PLC: Ethernet/IP Controller-to-IOC: Serial=> IOC <=IOC-to-OPI: Ethernet/CA

  5. Choices for PLC family • Allen-Bradley ControlLogix • More expensive • Needs cross-connects • More options (like serial) • Takes rack space • Driver exists (SNS) • Allen-Bradley FlexLogic • Cheaper • Direct to “screw terminals” • No serial • Probably needs driver upgrade • Can install in cabinets (DIN-rail) • Can be mixed • CLX for comm; FLX for I/O

  6. LCLS Global Standards… • Choice for Gauges • MKS-937A w/317-CEP and 422-CCG • 15 msec response option now (SNS) • 8 msec will be persued if warranted • A few hot-filament ion gauges will be required • Choices for Ion Pumps (in progress) • Gamma Digitel-MPC • SAFEConn connector and cables safety engineered • 2 supplies@ 500mA; 2 outputs each • Full functionality; serial comm • Kaiser IPS-300 (current SLAC usage) • StarCell connector and cables more administration-centric • 4 supplies@ 50mA; 2 outputs each

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