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LCLS Week 5 April, 2005 Steve Lewis

LCLS Week 5 April, 2005 Steve Lewis. Vacuum Standards. (I) Two Basic Approaches. Sensors + analog wires to PLC + Ethernet/IP to EPICS Serial for auxiliary functions “Dumb” controllers OK “Smart” controllers + serial to IOCs Inter-controller wiring optional Mixture of above. G. G. P. V.

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LCLS Week 5 April, 2005 Steve Lewis

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  1. LCLS Week5 April, 2005Steve Lewis Vacuum Standards

  2. (I) Two Basic Approaches • Sensors + analog wires to PLC + Ethernet/IP to EPICS • Serial for auxiliary functions • “Dumb” controllers OK • “Smart” controllers + serial to IOCs • Inter-controller wiring optional • Mixture of above

  3. G G P V C O 1a. Sensor-Analog-PLC-IOC • Operator uses portable console • Gauge/controller read-outs available • Minimal valve panel provided • PLC provides both single-sector and global control • Analog wiring to devices • Some loss of detail • EPICS uses Ethernet/IP for full access • Star-wiring to switches • EPICS “master” sequencing available <=Hardware-to-PLC: analog PLC I/O <=PLC-to-IOC & PLC-to-PLC: Ethernet/IP IOC <=IOC-to-OPI: Ethernet/CA P: Pump G: Gauge V: Valve C: Controller O: Operator

  4. G G P V C C O 1b. Sensor-Controller-Analog-PLC-IOC • Operator uses portable console • Gauge/controller read-outs available • Minimal valve panel provided • PLC provides both single-sector and global control • Analog wiring to devices • Some loss of detail • Delegate to smart gauge controller • EPICS uses Ethernet/IP for full access • Star-wiring to switches • EPICS “master” sequencing available <=Hardware-to-PLC: analog PLC I/O <=PLC-to-IOC & PLC-to-PLC: Ethernet/IP IOC <=IOC-to-OPI: Ethernet/CA

  5. G G P V C C O 1c. Sensor-Controller-Analog-PLC-IOC-Serial • Operator uses portable console • Gauge/controller read-outs available • Minimal valve panel provided • PLC provides both single-sector and global control • Analog wiring to devices • Delegate to smart gauge controller • EPICS uses Ethernet/IP for full access • Star-wiring to switches • Additonal serial path for more details • EPICS “master” sequencing available <=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

  6. G G P V C C O 2a. Sensor-Controller-Serial-Analog-IOC • Operator uses controllers directly • Minimal valve panel provided • Each sector is fully autonomous • EPICS uses serial for controller access • Analog wiring to valve • Inter-sector control only via EPICS <=Hardware-to-PLC: analog <=Hardware-to-IOC: analog Controller-to-IOC: Serial=> IOC <=IOC-to-OPI: Ethernet/CA

  7. G G P V C C 2b. Sensor-SmartController-Serial-IOC • Operator uses controllers directly • Each sector is fully autonomous • EPICS uses serial for full access • Inter-sector control only via EPICS Controller-to-IOC: Serial=> IOC <=IOC-to-OPI: Ethernet/CA

  8. (II) Choice of PLC family • ControlLogix • More expensive • Needs cross-connects • More options (like serial) • Takes rack space • FlexLogic • Cheaper • Direct to “screw terminals” • No serial • Probably needs driver upgrade • Can install in cabinets (DIN-rail) • Can be mixed

  9. LCLS Global Standards… • Choices for Gauges • MKS-937A w/317-CEP and 422-CCG • 15msec response option • Other? • Choices for Ion Pumps • Dual; Quad; ? • MPS-2 • SafeCONN • Kaiser • StarCell • Other?

  10. SNS Vacuum MPS Interlock Response Time 8/22/2004 jtang@sns.gov In 5 ms, PLC sends out MPS fault after the CCG setpoint relay opens CIP real-time remote IO response time via EtherNet/IP Scan Measured 10ms 12ms 20ms 15ms 50ms 25ms 100ms 75ms 90ms after PLC commands its SGV to close, the valve moves off its open limit switch contact In 2.5 ~3ms, PLC commands its SGV to close MPS stops beam within 20us after it receives vacuum SGV interlock The SGV travel time from open to fully closed is about 430ms MKS CCG setpoint relay opens 2.5ms 5ms 12ms* 15ms 25ms 75ms 90ms 520ms 0ms TurnOff 24Vdc to valve solenoid Valve not open Valve closed • 5 ms response time for PLC to send MPS fault after its local CCG relay set point opens (few single shot measurements) • SGV travel time is about 430ms and it moves off its open limit switch after 90ms (add “turnOff 24Vdc to SGV solenoid” as MPS interlock condition) • Fastest CIP real-time remote IO response time via EtherNet/IP is 15ms(single shot measurement)

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