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CERN Control Standards

CERN Control Standards. Front-End Computer Layer Stéphane Deghaye BE/CO/FE 01-07 - 2014. Agenda. Scope of the talk Hardware aspects Software aspects Contact list. Scope. Control system based on a 3-tier architecture Graphical User Interface running in the control room

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CERN Control Standards

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  1. CERN Control Standards Front-End Computer Layer StéphaneDeghaye BE/CO/FE 01-07-2014

  2. Agenda • Scope of the talk • Hardware aspects • Software aspects • Contact list 2 CERN Control Standards – Front-End Computer Layer

  3. Scope • Control system based on a 3-tier architecture • Graphical User Interface running in the control room • Business tier running on servers • Real-time control running on Front-End Computers • This presentation doesn’t cover the high-level control aspects • Front-End Computer (aka FEC) • Embedded system (no HDD, screen, keyboard) connected to the mains and Ethernet • Real-time control (and acquisition) of the hardware High-level Low-level 3 CERN Control Standards – Front-End Computer Layer

  4. Hardware aspectsControllers • FEC platforms • VME bus crate (ELMA) + MEN A20 CPU (several sizes avail.) • PICMG 1.3 (Kontron industrial PCs), PCI & PCI-e supported • Low-level controllers • PLCs (Siemens) • PXI crates • Mini-PCs 4 CERN Control Standards – Front-End Computer Layer

  5. Hardware aspectsModules • Generic I/O modules for VME & PCI(-e) • Function generation • Digital I/O • Analogue I/O • ADC & Digitiser (up to 8 GSa/s) • Timing and fine delay (CTR,...) • … • Other more specific modules also available (e.g. RS422, Mil1553) but w/o the complete integration 5 CERN Control Standards – Front-End Computer Layer

  6. Hardware aspectsExtensions • FMC – ANSI/VITA mezzanine standard • No predefined pin layout (except mezzanine ID with I2C) • Analogue part on the mezzanine & FPGA on the carrier board • CERN-made carriers available (low pin count version) • VME (2 FMCs) • PCI-e (1 FMC) • Integration of new non-FMC modules (VME or PCI-e) by the collaboration also possible 6 CERN Control Standards – Front-End Computer Layer

  7. Hardware aspectsPurchases & installations • The Controls group provides a service for the procurement and installation of the FECs and their modules • Strongly recommended to use the service to ensure: • Hardware type is exactly the one supported • Installations are done according to the CO rules • Installations are recorded and documents properly • Interventions are possible by the support team • Payment is done thanks to CERN budget codes (project, team…) 7 CERN Control Standards – Front-End Computer Layer

  8. Software aspectsOS & drivers • All FECs are now running Linux as operating system • Two versions available: • Scientific Linux CERN 5 (based on RHE 5) – 32 bits • Scientific Linux CERN 6 (based on RHE 6) – 64 bits • All CO supported modules (VME/PCI-e) come with their kernel driver and user library • CO provides a kernel driver generator should new module be integrated (Encore) 8 CERN Control Standards – Front-End Computer Layer

  9. Software aspectsReal-time applications • Real-time applications are developed with FESA. • FESA is a toolthat helps with: • Design/modelling of the class • Boiler-plate code (generated from the design) • Communication • Data handling • Real-time scheduling • … • Should new FESA classes be developed, consider registering to the training (3 days) C++ framework 9 CERN Control Standards – Front-End Computer Layer

  10. Software aspectsGeneric FESA classes • For CO supported modules, there are one or several FESA classes already available. E.g. • Arbitrary/Periodic function generation • Digital/Analogue I/O (several modes) • ADCs and digitisers (kHz  GHz) • Pulse generation and manipulation (Timing receiver, fine delay…) • Existing classes can be extended (composition/association) to build a specific system or post-process further the data (e.g. cursor…) • In some cases, high-level generic applications are available (OASIS, function editor…) 10 CERN Control Standards – Front-End Computer Layer

  11. Software aspectsLow-level controllers • The communication between the FECs and the low-level controllers (e.g. PLC) is done thanks to the IEPLC library • “Data block exchange” type of protocol • Tool to design the data structure and generate the code 11 CERN Control Standards – Front-End Computer Layer

  12. Integration with CO high-level software • Not to be overlooked • Generic high-level don’t support all possibilities given by the low-level  integration tests early in the process • CMW-RDA is the main communication protocol (middleware) and must be use if custom solutions are put in place • Sending data over the network is not sufficient for the generic tools; require database description and proper integration  strive for using CO supported solutions 12 CERN Control Standards – Front-End Computer Layer

  13. For more details on… • FEC platforms & procurement: Marc VandenEynden • Installations: Claude Dehavay • Generic modules & extension (FMC): Javier Serrano • Low-level controller & IEPLC: Frank Locci • Operating system: Stephen Page • FESA framework: StéphaneDeghaye • Generic module software: Steen Jensen • Analogue signal acquisition: AnastasiyaRadeva 13 CERN Control Standards – Front-End Computer Layer

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