DOE Review 11 May 2005 Stephen A. Lewis Vacuum Standards DOE Review 11 May 2005 Stephen A. Lewis

Gauges, valves, and controllers connect to PLC with analog wires 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

PLC is distributed Basic Approach 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

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

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

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