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| TPPB05 |
The Cryogenic Control System of BEPCII
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controls, cryogenics, superconductivity, monitoring |
169 |
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- M. H. Dai, Y. L. Huang, B. Jiang, K. X. Wang, K. J. Yue, J. Zhao, G. Li
IHEP Beijing, Beijing
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A cryogenic system for the superconducting RF cavity (SRFC), superconducting solenoid magnet (SSM), and superconducting quadrupole magnet (SCQ) has been designed and installed in the Beijing Electron-Positron Collider (BEPCII). The cryogenic control system is a fully automatic system using PLCs and EPICS IOCs and consists of three components. One is the Siemens PLC system for compressor control, another is the AB-PLC system for cryogenic equipment control, and they are integrated into the high-level EPICS system. The functions of cryogenic control include process control, PID control loops, real-time data access and data restore, alarm handler, and human–machine interface. The control system can also be automatically recovered from emergency. This paper will describe the BEPCII cryogenic control system, data communication between S7-PLC and EPICS IOCs, and how to integrate the flow control and the low-level interlock with the AB-PLC system and EPICS.
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| TPPB23 |
LHC Powering Circuit Overview: A Mixed Industrial and Classic Accelerator Control Application
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controls, monitoring, cryogenics, diagnostics |
211 |
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- H. M. Milcent, F. B. Bernard
CERN, Geneva
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Three control systems are involved in the powering of the LHC magnets: QPSs (Quench Protection Systems), PICs (Powering Interlock Controllers), and PCs (Power Converters). They have been developed and managed by different teams. The requirements were different; in particular, each system has its own expert software. The starting of the LHC hardware commissioning has shown that a single access point should make the tests easier. Therefore, a new application has been designed to get the powering circuit information from the three expert softwares. It shows synthetic information, through homogenous graphical interfaces, from various sources: PLCs (Programmable Logic Controllers) and WorldFIP agents via FESA (Front-End Software Architecture) and via gateways. Furthermore, this application has been developed for later use. During the LHC operation, it will provide powering circuit overview. This document describes the powering circuit overview application based on an industrial SCADA (Supervisory Control and Data Acquisition) system named PVSS with the UNICOS (Unified Industrial Control System) framework. It also explains its integration into the LHC accelerator control infrastructure.
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