1. Alice TOF Production Readiness Review Gas Control Systems

2. General Philosophy Modular design – Identification of Gas Modules – Applies to both Hardware and Software Electrical and Controls Interfacing Hardware Housed in 3U high 19” Rack mounting Trays – Standardized Layout and Construction – easy relocation of electronics (minimal re-work) Where Possible, Use of Standard Industrial “Off the Shelf” components Hardware and Software Well Documented Allowing Work Load to be placed On Other Sections/Outside Contractors.

3. Controls Hardware

4. Component Selection Industrial PLCs - Schneider (Cern recommended) Quantum & Premium Industrial distributed I/O modules - Wago Cern Designed Radiation tolerant ELMB for Flow Cell readout Industrial Networks – Profibus, CanBus for I/O interfacing Some Gas Hardware with Profibus Interfaces “built in”. Ethernet Network (TCP/IP Modbus with UNICOS middleware for PLC to PLC and PLC to SCADA communications)

5. Control System Architecture Schneider “Quantum” PLC Schneider “Premium” PLC Wago Profibus I/O CanBus ELMB Profibus MFC Profibus Pump Controller Profibus DP TCP/IP Modbus CanBus

6. Device Interfacing Motor Speed Controller – Direct Profobus Interface Motor Starer (required above 1 Horsepower) Pump/M otor PLC with Profibius Module Flow Transmitter (4-20mA) Flow Switch (DI) Pressure Transmitter (0-5V) Isolating Barriers (Used between control system and gas rack when Flammable Gas Present) Wago I/O Modules with PB Coupler 4-20mA Controlled Power Regulator Heating Cable Pt100 Temperature Sensor

7. Cabling of Gas Racks Mixer Rack – Profibus daisy chain of 4 mass flow controllers

8. Mixer Rack - Electrical Box Cabling of Gas Racks

9. Wago I/O System

10. 750-301 Profibus DP Coupler 750-402 24V D/I (4 ch) 750-402 24V D/I (4 ch) 750-530 24V D/O (8 ch) 750-461 Temp. I/P (2 ch) 750-461 Temp. I/P (2 ch) 750-504 24V O/P (4 ch) 750-504 24V O/P (4 ch) 750-504 24V O/P (4 ch) 750-600 End Module 750-474 4-20mA I/P (2 ch) 750-401 24V D/I (4 ch) 750-554 4-20mA O/P (2 ch) 750-530 24V D/O (8 ch) 750-461 Temp. I/P (2 ch) 750-602 Separation Module 750-504 24V O/P (4 ch) 750-504 24V O/P (4 ch) 750-468 0-10V A/I (2 ch)

11. Controls Interface Tray

15. Industrial “Hot Swap” Power Supplies Control Chassis For CO2 Removal Module Control Chassis For Mixer Module Control Chassis For Pump Module (with Frequency Controller Mounted Away From Other Electronics) Control Chassis For Distribution Module Control Chassis For Purifier Module Schneider “Quantum” PLC Controls Rack Overview Schneider “Premium” PLC

16. Control Rack Bus Distribution Miniature Circuit Breaker Profibus 24VDC Distribution 3 Phase Distribution N+1 redundant power supply system Main Incoming Power Isolator

17. Electrical Schematics

19. PLC Software

20. UNICOS (Unified Control System) Develoed originally for the Cryogenics systems by GTD Alsthom, and now adapted in a colaboration to enable it to be equally applied to gas systems. Device Oriented approach to PLC programming, making use of Function Blocks written in Structured Text language For every hardware “Device” there is an equivalent software object – these objects fit into “classes” e.g. field objects, Process Control Objects etc – instances are created for each device Each Software Object has an equivalent object at the SCADA system, allowing devices (via the PLC) to fully report states, be taken into manual control, have parameters associated with them, be given interlocks etc

21. Software Structure GCS ALICE TPC TOP MODULE MIXER PURIFIERDIST. PUMP EXHAUST RECOVERY COLUMN A COLUMN B FIELD OBJECTS I/O OBJECTS

22. Software Structure

23. UNICOS Program Structure

24. URD (User Requirements Document) – Covers All Modules Generation of State Diagrams Design Approval Design Specification (for Each Module) Design Reviews Implementation/Coding Software Design

25. Module State Diagram

26. SCADA Software (Supervisory Control and Data Acquisition)

29. M

30. Modes of Operation

35. Piping & Instrumentation Drawings (P&IDs) and Instrument Identification

36. Piping & Instrumentation Drawings

37. Standard Identification Letters

38. Numbering Scheme

39. Examples Of Identification Coding

40. Controls Symbols

41. How to Read A P&ID