PLC Control System for the PKUNIFITY

A compact remote control system with the SIMATIC S7-300 PLC is being designed for Peking University Neutron Imaging FaciliTY (PKUNIFTY). PKUNIFTY consists of a 2.45GHz ECR Deuteron ion source, LEBT, a 201.5MHz RFQ cavity, HEBT and Be target. Now PLC control system for ECR ion source and LEBT has been completed and tested. This paper will present the structure of the control system, the HMI with useful data recording system, and some measures took to improve the system safety.

A 3.0 MV high current low energy Pelletron Accelerator facility (Model 9SDH-4, NEC, USA) with TORVIS (ion source for H+ and He2+ beam current H + ion ~ 50µA @ 6 mev, He 2+ at ~ 10 µA) and SNICS-II ion source for heavy ions has been commissioned as " National Centre for Accelerator Based Research " in the Department of Pure & Applied Physics, Guru Ghasidas Vishwavidyalaya, India. The first proton beam accelerated at terminal potential of 0.965 MV has been seen at ion beam analysis chamber in Nov. 2015. After conditioning the facility for about one month, we obtained the lower 10-8 torr vacuum in the beam lines and 3.0 MV terminal voltages at typical chain currents of 120 mA. In addition of system interlocks and passive shielding arrangements as per the AERB guidelines, we have also developed and implemented a PLC based control system to take care of search and secure procedure, ensuring the beam hall and other mandatory gates closure while the beam is on and switching off the machine whenever, the radiation crosses the specified limit. During the period, we faced several maintenance issues and completed the maintenance in-house successfully. This includes, opening of accelerator tank, replacing the OFC link between light link & terminal electronics box inside the Pelletron tank, calibration and routine maintenance of HVAC, compressor and Chiller units. A programmable logic controller (PLC) is an industrial computer control system that continuously monitors the state of input devices and makes decisions based upon a custom program to control the state of output devices. The programming Languages of PLC systems are ladder logic, block diagrams, assembler, or C. The interconnection among PLCs is via the bus provided by PLC manufacturers and they are easy to up-connect to a host computer by computer's I/O ports or a network. The control system uses Siemens hardware & Simatic Wincc flexible runtime SCADA software for user interfacing with the PLC system. The embedded software running on PLC samples the entire digital signal and communicates with SCADA software running on Operator Console (OC) and Display Stations (DSs) on a 100Mbps Local Area Network (LAN). PLC sends the current values of all signals to the OC on the Ethernet link periodically. PLC also sends the alarms and trips generated along with time stamp to the OC as and when they are detected. The OC saves the important signals at regular configurable intervals and sends the user commands to PLC. The configuration of the system is given below: Digital Inputs and Output

2020

During the CERN Long Shutdown 2 (LS2), the 200 MHz main acceleration system of the Super Proton Synchrotron (SPS) is being upgraded. Two cavities will be added to reach a total of six. Each new cavity will be powered by Solid State Power Amplifiers (SSPA) grouped into 16 "towers" of 80 modules each, in total 2560 modules. This paper describes the newly developed control system which uses a master PLC for control and interlock of each cavity and the slave PLC controllers for each of the solid state amplifier towers. The system topology and design choices are discussed. Control and interlocking of all subsystems necessary for the operation of an RF cavity are detailed, and the interaction between the master and slave PLC controllers is outlined. We discuss some preliminary results and performance of the test installation.

The superconducting cyclotron's vacuum control system has been developed at Variable Energy Cyclotron Center (VECC) indigenously. The s7 series of siemens plc system controls the whole process. A pc serves as the interface to the system for monitoring and control. The pc communicates with the plc system via serial port to the communication controller at plc side. There are two distinct part of the pc software. The first one is the vacuum server for the real-time communication with the plc using 3964r protocol and a TCP/IP server to communicate with the second part, the vacuum client. The vacuum client is the control and monitor ing interface for actual operation. It communicates with the vacuum server. The client gets master control depending upon IP address & the level of user authentication. The complete system starting from the fabrication of the Motor control Center (MCC) to the design of the monitoring & control software for pc and the user software for the plc have been developed in house. The heart of the system is plc -pc real-time communication protocol 3964r that needed to be implemented in c/c++ on real-time platform. The windows platform gives a very good graphical environment for human interface at the same time imposes lots of difficulties in implementing the real-time features. However, the protocol has been implemented with a few precautionary measures that windows platform ensures. Therefore, only a soft-real-time system could be implemented. The experience is quite interesting, specially developing the plc -pc real-time communication protocol under windows environment.

2018

NSC KIPT Neutron Source on the base of subcritical assembly involves 100 MeV/100 kW electron linear accelerator as a driver [1,2,3,4]. Because the Neutron Source is nuclear facility, all technological systems of the facility are under regulation of State Inspection of Nuclear Regulation of Ukraine that is working in accordance with international nuclear regulation legislation. This regulation demands certain requirement to the design and realization of the facility control system in order to provide the conditions of the facility safe operation. In the paper, the features of control system of the linear accelerators as a part of nuclear facility NSC KIPT Neutron Source are described. THE STRUCTURE OF CONTROL SYSTEM Control System of the Linear Accelerator of "Nuclear Facility" is designed for monitoring and control the equipment of the accelerator and the accelerator transportation channel in all operation modes, ensuring the safety of the operation of the "Neutron so...

Journal of Physics: Conference Series, 2019

The instrumentation and control system (ICS) for a subcritical assembly for molly-99 production (SAMOP) reactor experimental facility is presented in this paper. The system is designed based on the defense-in-depth concept. SAMOP reactor is fuelled by uranyl nitrate and driven by an external neutron source from Kartini reactor beam-port. The ICS was designed using 2 neutron detectors of fission chamber and compensated ionization chamber types and provided with a safety rod made from boral used for shutting-down the reactor in emergency condition. The method used for reactor protection system is based on hardwire with a fail-safe principle. The safety rod drive mechanism is designed by using rack and pinion, and provided by the safety button of key release and electromagnetic holder status.

2008 11th International Biennial Baltic Electronics Conference, 2008

Today new terms like "distance learning", "remote laboratories", "virtual learning environments" etc have emerged. The TUT Department of Electrical Drives and Power Electronics has launched design project of remotely controlled electrical drives laboratories where students can make experiments on real objects. Designing a remote laboratory presumes finding solutions to problems regarding technical and security requirements as well as the integration into a wider distance learning environment. As mentioned the PLC (Programmable Logic Controller) based control of remote laboratory experiments is quite a complex solution, however it provides some advantages in the electrical drives remote laboratory.

New Physics: Sae Mulli, 2015

Superconducting cavities, a HWR#2 cryomodule (type-2 cryomodule for a half-wave resonator cavity) and a local control system for remote control of HWR#2 cryomodule have been developed at the heavy ion accelerator RAON. PLC (programmable logic controller) and Labview software-based on a PC (Personal Computer) have been designed for the local control system of the cryomodule. This local control system operates devices and monitors and archives all signals from the devices. It includes an interlock and alarm system, as well. In this report, we describe the local control system of the HWR#2 cryomodule, which was developed in early 2015 and was tested at cryogenic temperatures.

Atom Indonesia, 2011

DESIGN AND CONSTRUCTION OF THE CONTROL SYSTEM FOR BATAN SMALL ANGLE NEUTRON SCATTERING SPECTROMETER (SMARTer). A 36 m Small Angle Neutron Scattering (SANS) Spectrometer (SMARTer) has been installed in Serpong, Indonesia in 1992. As time goes by, the original main computer was out of order and the instrument had not been operated since 2003. In order to activate the SMARTer, in the year 2005, a work on designing and constructing a new control system for SMARTer was carried out. The main component of this control system is a programmable peripheral I/O (IC PPI 8255) and was assembled as a plug-in board at an ISA slot of a personal computer. An IC PPI 8255 was programmed to control the mechanical movements of the instrument's components: four neutron guide tubes, six pinholes collimator, a detector and a beam stopper. The test either with or without neutron beam has shown that this control system can be implemented for the mechanical movements of SMARTer. Error of moving the detector in the distance range of 1.5 m-18 m is only 1 mm and the other movements have no error at all (precise).

2015

The KEKB accelerator control system including a control computer system, a timing distribution system, and a safety control system are described. KEKB accelerators were installed in the same tunnel where the TRISTAN accelerator was. There were some constraints due to the reused equipment. The control system is based on Experimental Physics and Industrial Control System (EPICS). In order to reduce the cost and labor for constructing the KEKB control system, as many CAMAC modules as possible are used again. The guiding principles of the KEKB control computer system are as follows: use EPICS as the controls environment, provide a two-language system for developing application programs, use VMEbus as frontend computers as a consequence of EPICS, use standard buses, such as CAMAC, GPIB, VXIbus, ARCNET, RS-232 as field buses and use ergonomic equipment for operators and scientists. On the software side, interpretive Python and SAD languages are used for coding application programs. The pu...