UNICOS-CPC applied to Cryogenics and specifications Benjamin Bradu EN-ICE-PLC February 2014

Summary UNICOS-CPC for LHC cryogenics Overview of the cryogenic systems Functional decomposition UNICOS implementation Control System Specifications Specification documents Functional Analysis UNICOS-CPC Design

LHC cryogenics 3

Sector Refrigeration plant 4 Nitrogen Tanks Dryer for adsorbers MP Buffer

PLC for LHC cryogenics 5

Refrigeration plants K ( K) 4.5 K ( K) Courtesy to L. Tavian

Storage and distribution 7 Storage Distribution Courtesy to L. Tavian

Process Control Object decomposition Identify Process Control Objects (PCO) Defined as units or Equipment modules in IEC Collection of actuators and/or other units Can carry out a finite number of processing activities Contains all the necessary equipments to carry out these activities Can execute procedural sequences Can drive other PCO Can be driven by another PCO A “Top PCO” is a PCO without master Driven by operator to start/stop the complete plant Example of PCO : A Compression Station : 2 compressor + 4 valves 8

Process Decomposition : Top PCOs MP Buffer Interconnection Box Sector (Magnets) 4.5 K 1.8 K

Process Decomposition : 2 nd PCO layer Warm Compression Station 4.5 K MP Buffer Interconnection Box Sector (Magnets) 1.8K Sector Refrigeration Plant Warm Compression station 4.5 K 1.8 K ARC Section Long Straight Section

3 rd PCO layer in a compression station 11 High Stage Compression Station Boosters Pressure Control Connect Oil LP Oil HP

3 rd PCO layer in a 4.5K 12 Precooler T23 T45 T67 T89 TA Shields Adsorber1 Adsorber3 Connect CB Vaccum Adsorber2 4.5K Helium Main Flow Load Interface

Ending PCO 13 Adsorber3 Input Valve Output Valve Hand Valves OnOff Valves Motor Slide Valve Booster 2

I/O Objects UNICOS break down in PLC Device Type = Object Class PLC instance SCADA Instance Equipment modules/Units Process Control Objects (PCO) Control modules Field Objects I/O acquisition I/O Objects Operation team must be able to act on each object In degraded operation conditions operation crew can overcome process logic requests Field Objects Control Objects I/O Boards Control Valve Equipment module (Turbine 1) AI position AO position Control Valve DI End switch DO position OnOff Valve Equipment module (Adsorbeur) UNIT (CRYOPLANT) C P O Equipment module (Cold Box) Equipment Module (Compressor Station) AI position AO position

LHC Compressor station decomposition 15

LHC Cold-Box Decomposition 16

Specifications for UNICOS-CPC 17

Specification Document Set 18 Requirement documents Process & Instrumentation Diagram Instrument List (1) Functional Analysis (1) Design documents UNICOS xml specification 1 UNICOS Logic Templates 1 PLC code SCADA objects P C 1 : Template provided by CERN-EN-ICE Generators + C

What is a good set of specifications? Easy to understand for other people Terminology/Acronyms definitions “Comments” in documents Easy to find particular information Same place according to information type Limit cross references in documents Easy to modify Information located at a unique place No doubloons 19

Functional Analysis Descriptive document Oriented for Continuous Process Control (CPC) Exhaustive document No PLC language inside No platform oriented Structured English, drawings and diagrams can be used Hierarchically oriented Describe the automatic behavior of the process General description of process Decomposition of the process into control units Exhaustive descriptions for each control unit Actuator behaviors Regulation loops Alarms and interlocks Possibilities given to operators

Table of content of a Functional Analysis 21

Thank you for your attention Any Questions ?