Keyword: PLC
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WEC1 The Do’s and Don’ts in Process Controls - Lessons Learned Over 35 Years controls, software, cryogenics, hardware 1
 
  • M.R. Clausen, T. Boeckmann, J. Hatje, O. Korth, M. Möller, J. Penning, H.R. Rickens, B. Schoeneburg
    DESY, Hamburg, Germany
 
  Designing, implementing and maintaining process control systems for cryogenic plants requires different viewpoints compared with those in machine controls. 24/7 operations for more than a year is a basic requirement. Hardware and software must be designed to fulfill this requirement. Many projects are carried out with industrial partners. Companies specify the process control logic which gets implemented by the local DESY team. Responsibilities, time tables and milestones must be clearly defined in such a case. Several cryogenic installations have been equipped with state of the art process control systems for cryogenic controls. Where the last one being the European XFEL. In the course of time commercial and open source systems were implemented and maintained. Control loops were basically always implemented in front end controllers running the real-time operating system VxWorks and EPICS as the control system toolkit. The approach to use PLCs will be discussed as an alternative approach. Large installations like the European XFEL require good project planning. Our success story will finalize our look back and initiate our look forward.  
slides icon Slides WEC1 [2.559 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-PCaPAC2018-WEC1  
About • paper received ※ 12 October 2018       paper accepted ※ 15 October 2018       issue date ※ 21 January 2019  
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WEP01 EtherCAT Driver and Tools for EPICS and Linux at PSI EPICS, controls, real-time, Linux 22
 
  • D. Maier-Manojlovic
    PSI, Villigen PSI, Switzerland
 
  EtherCAT bus and interface are widely used for external module and device control in accelerator environments at PSI, ranging from modulator and undulator communication and control, over motion control, basic I/O control, all the way to Machine Protection System for the new SwissFEL accelerator. A combined EPICS/Linux driver package has been developed at PSI, to allow for simple and mostly automatic setup of various EtherCAT configurations. The driver is capable of automatic scan of the existing devices and modules, followed by self-configuration and finally autonomous operation of the EtherCAT bus real-time loop. Additionally, the driver package supports the user PLC to manipulate EtherCAT data in real time, implements fast real-time (single cycle) slave-to-slave communication (skipping EPICS layer or PLC completely), features guaranteed one-shot trigger signals otherwise not supported by EPICS and much more. All the standard EtherCAT functions are supported, including the complete reprogramming of slave configurations and configuration generation for programmable slaves, such as EL6692 and EL6695 network bridges.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-PCaPAC2018-WEP01  
About • paper received ※ 08 October 2018       paper accepted ※ 16 October 2018       issue date ※ 21 January 2019  
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WEP13 Control System Upgrade for the FFAG Accelerator Complex at KURNS controls, EPICS, FFAG, LabView 60
 
  • Y. Kuriyama, Y. Fuwa, Y. Ishi, Y. Mori, H. Okita, T. Uesugi
    Kyoto University, Research Reactor Institute, Osaka, Japan
 
  Fixed field alternating gradient (FFAG) accelerator complex has been operated as a proton driver for the experiment of accelerator driven system (ADS) at Institute for Integrated Radiation and Nuclear Science, Kyoto University (KURNS)*.  PLC based control system has been developed and the operator interface has been connected to PLC via network. Originally, a LabVIEW based operational interface was chosen to construct the system because of its easiness. However we met an upgrade problem, and a new control system based on EPICS instead of LabVIEW was introduced in 2010. In the spring of 2018, the replacement from LabVIEW to EPICS has been almost completed except for the beam interlock system and the LINAC control system provided by LINAC production company (AccSys). Also, the EPICS archiving tool (Archiver Appliance) has been invoked and operated at the end of 2017. This Presentation reports the details of the current control system and also the upgraded GPIB control and storage system.
*Formerly, Kyoto University Research Reactor Institute (KURRI).
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-PCaPAC2018-WEP13  
About • paper received ※ 10 October 2018       paper accepted ※ 15 October 2018       issue date ※ 21 January 2019  
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WEP30 Design of Reliable Control with Star Topology Fieldbus Communications for an Electron Cyclotron Resonance Ion Source at RIBF controls, ECR, ECRIS, EPICS 105
 
  • A. Uchiyama, N. Fukunishi, Y. Higurashi, M. Komiyama, T. Nagatomo, T. Nakagawa, J. Ohnishi
    RIKEN Nishina Center, Wako, Japan
  • K. Kaneko, M. Tamura, H. Yamauchi
    SHI Accelerator Service Ltd., Tokyo, Japan
 
  In RIBF project, a superconducting linac will be implemented in order to enhance the beam energy necessary for promoting super heavy element experiment. A new 28 GHz electron resonance ion source has been installed upstream of them. Its control system will be consisted of Yokogawa FA-M3 series which is a porgrammble logic controller (PLC) with EPICS because of many achievements in case of RIBF control system. On the other hand, in the previous system with PLCs there was a disadvantage of low reliability for communications between PLC stations. Additionally, some devices (eg, oven, mivoc etc.) are changed for the generation of various kind of ions each times, therefore higher expandability is required. In the new system, we have designed the control system by utilizing star topology fieldbus for communications between the PLC stations to establish safety and expandability. In this conference, we report on the details of the system.  
poster icon Poster WEP30 [44.243 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-PCaPAC2018-WEP30  
About • paper received ※ 15 October 2018       paper accepted ※ 17 October 2018       issue date ※ 21 January 2019  
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WEP31 Design of PLC Temperature Flow Acquisition System Based on EPICS rfq, EPICS, interface, controls 109
 
  • H. Zheng, H. Cao, Y.X. Chen
    IMP/CAS, Lanzhou, People’s Republic of China
 
  In the design of the ADS injector II, the RFQ cavity holds a supreme status, and the RFQ temperature and flow information are the key parameters for the cavity frequency tuning. To ensure the long-term, stable and accurate acquisition of temperature flow data is the core task of control. In this paper, the PLC temperature flow acquisition system which is based on EPICS design was described, and the EPICS driver of this PLC was developed independently. The driver uses TCP/IP connection to EPICS IOC, and the communication protocol uses the "data block overall transmission protocol", to ensure the stability of the device’s data communications. After 3 months of long-term operation inspection, this acquisition system can ensure long-term and stable acquisition of real-time temperature and flow data of the equipment, and be able to send control information to related controlled equipment. In addition, redundant PLCs and redundant IOCs were adopted in this acquisition system to make the switch to alternate channels within milliseconds once a channel fails.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-PCaPAC2018-WEP31  
About • paper received ※ 09 October 2018       paper accepted ※ 15 October 2018       issue date ※ 21 January 2019  
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WEP34 The Control System based on EPICS for the Experimental Target Prototype controls, target, EPICS, experiment 116
 
  • Q. Zhao, M.H. Cui, L. Li, M.B. Lv, L.L. Pang, C.W. Qiang, Y.B. Sheng, J.R. Sun, F. Wang, W.F. Yang, X.Y. Zhang, X. Zhang, S.X. Zhao, Y.B. Zhu
    IMP/CAS, Lanzhou, People’s Republic of China
  • C. Liu
    Lanzhou University, Lanzhou, People’s Republic of China
 
  Building a high power spallation target is one of the critical issues in Accelerator Driven System (ADS). The control system which was built based on the real-time distributed control software of experimental physics and industrial control system (EPICS) was attempted for the experimental target prototype. There are several sub-systems in the target system, e.g. the elevating system, the vacuum system, the heat-exchanging system. As an IOC, each sub-system was finally integrated into the control system of the target by different drivers and methods because different hardware devices were used for each sub-system. The ’SLS s7 driver’ which was devel-oped based on the Ethernet Interface was used for the communication between the Siemens PLCs and the Hu-man Machine Interface (HMI). The interfaces between Labview and EPICS were used for the NI (Nation-al Instruments) DAQs systems. In addition, the driver developed by ourselves was used for devices with serial ports, e.g. RS-232 or RS-485/422. The control system was finally proved stable and could basically meet the ele-mentary requirements of the spallation target system.  
poster icon Poster WEP34 [0.757 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-PCaPAC2018-WEP34  
About • paper received ※ 09 October 2018       paper accepted ※ 15 October 2018       issue date ※ 21 January 2019  
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THCA5 Rethinking PLCs: Industrial Ethernet for Large-Scale Real-Time Distributed Control Applications controls, hardware, software, network 136
 
  • B. Plötzeneder, O. Janda, A. Kru’enko, J. Trdlicka
    ELI-BEAMS, Prague, Czech Republic
  • P. Bastl
    Institute of Physics of the ASCR, Prague, Czech Republic
 
  Funding: Extreme Light Infrastructure - Phase 2 (CZ.02.1.01/ 0.0/0.0/15008/0000162; Ministry of Education, Youth and Sports CZ / European Regional Development Fund)
Many research facilities rely on PLCs to automate large slow systems like vacuum or HVAC, where price, availability and reliability matter. The dominant architecture consists of local units of controllers/ modules (programmed in IEC61131-3 languages), which operate mostly autonomously from a SCADA layer. While some vendors provide low-level stacks to encourage growth of their ecosystems, PLC programming remains largely within a closed, proprietary world. In this paper, we introduce a different way of thinking about PLC hardware. Working with the open stacks intended for the design of new EtherCAT (Beckhoff) / Powerlink (B&R) modules, we built an abstract C+± API to control the existing ones. These industrial ethernet busses can be propagated using standard network hardware, so any RT-Linux system can now control any PLC module from anywhere in our facility using high-level languages (C++, LabVIEW). This way, PLC modules are seamlessly integrated into our distributed TANGO-based control system. PC-PLC interfaces are no longer needed; or in the case of traditionally implemented subsystems (machine safety), trivial.
 
slides icon Slides THCA5 [2.456 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-PCaPAC2018-THCA5  
About • paper received ※ 18 October 2018       paper accepted ※ 25 April 2019       issue date ※ 21 January 2019  
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THP02 Current Status of the RAON Machine Protection System Development operation, controls, machine-protect, target 160
 
  • H. Jin, Y. Choi, S. Lee
    IBS, Daejeon, Republic of Korea
 
  For the RAON accelerator that transport beams with high energy and power, a machine protection system (MPS) that protects each device from sudden beam loss is necessary. For this reason, we have been preparing for the development of the MPS with the start of the RAON accelerator construction. For effective MPS operation and stable accelerator operation, we divided the MPS into four subsystems: fast protection system, slow interlock system, run permit system, and post-mortem system. Among them, the FPGA-based fast protection system and the PLC-based slow interlock system have been tested by prototypes and are currently working on the mass production. The run permit system and the post-mortem system are also undergoing basic design and software development. In this paper, we will describe the progress of the MPS development through detailed hardware and software development in the RAON accelerator and explain the future plans.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-PCaPAC2018-THP02  
About • paper received ※ 04 October 2018       paper accepted ※ 15 October 2018       issue date ※ 21 January 2019  
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