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1. a zz oe Val ves Gauges TEnperar we Sensor s Figure 4 Architecture of vacuum control system of storage ring H her net P OCTAL485 Ethernet _ 1756 B16 17560816 Cont rd Logi x 5555 The ControlNet 6 is selected as the field bus to exchange data between PLCs It has high speed deterministic and repeatable network features and has producer consumer communication model It can have redundant media and can remove insert devices under power It is ideal for transmitting time critical vacuum system information and providing real time control The communication between IOCs and PLCs can be through ControlNet or alternatively Ethernet IP The interface 485 board of ControlNet on IOC is SST 5136 CN VME Two IOCs are planned for vacuum controls of storage ring positron and electron rings respectively The IOC interfaces directly with vacuum device controllers if the controllers use serial communication RS232 or RS485 for example gauge controller GC ion pump controller IPC temperature controller TC The ControlNet needs configuring before running The configuration method is as follows e Configure and start the SST card according to the card s user s manual e Prepare software RSNetworx to configure SST card Register new eds file in RSNetworx using EDS Wizard e Configure all the modules of ControlLogix PLC using software RSLogix5000 e Configure the produced and consumed tags in RSLogix5000 for Co
2. individual device control and easy for system configuration e It can store the max min readings on board e Initial values of DA and DO can be programmed e The built in watch dog reduces the ratio of failure System Architecture before Upgrade The original power supply control system of linac is shown in figure 1 which was upgraded from the former RS232 serial network A PC s serial port is connecting to a RS232 CAN converter The PC controls the CAN bus through the converter Each CAN node can control up to 4 magnet power supplies PS Figure 1 System architecture before upgrade System Architecture under EPICS The new power supply control system of linac under EPICS is shown in figure 2 On EPICS Input Output Control IOC side MVME2431 is used as the CPU board The IP module TIP810 version 2 0 is used as CAN controller module the IP carrier board is VIPC616 The former RS232 CAN converter is removed On EPICS Operating Interface OPI side SUN workstation running Solaris 8 or PC running Exceed is used for software development and machine operating Proceedings of ICALEPCS2003 Gyeongju Korea CPU BOARD IMWIVE2431 P Tl P810 I P CARR ER Vi PC616 Figure 2 System architecture under EPICS Software Development The software development consists of the following parts migration of CAN bus device driver design of new type of EPICS record EPICS database design and human machine interface HMI developme
3. 8 90 8 90 7 32 6 86 6 86 7 67 7 44 7 44 10 59 1022 1022 10 21 10 12 1012 ey 11 73 11 58 1158 Ser 10 91 10 73 1073 eral 20 02 19 77 19 77 SET 12 48 12 73 1273 Kew 13 66 13 41 13 41 ser EJ 13 84 13 79 13 79 ser Plie a 4095 Figure 3 An OPI screen for linac power supply control system 484 Proceedings of ICALEPCS2003 Gyeongju Korea CONTROLNET IN VACUUM CONTROL SYSTEM AT STORAGE RING The vacuum system is to maintain the high vacuum of beam chamber to ensure the positron and electron s accelerating and storing in it The vacuum control system will control and monitor the following devices ion pumps gauges valves and temperature sensors etc Two Allen Bradley ControlLogix PLCs are selected as the heart of the vacuum protection interlock system because ControlLogix is about 8 10 times faster and 30 cheaper than PLC 5 4 The SNS Project has selected the ControlLogix PLC as the standard PLC 5 The PLCs are used to monitor vacuum pressure and gauges interlock outputs and to provide control of the sector gate valves The PLCs also output interlock signals to RF system and other subsystems and receive interlock signals from other machine protection system MPS A ladder logic program resides and runs in the PLC processor to control the gate valves on a fail safe basis Based on EPICS the architecture of vacuum control system of storage ring 1s shown below Qontrol Net
4. Proceedings of ICALEPCS2003 Gyeongju Korea APPLICATIONS OF CANBUS AND CONTROLNET IN EPICS SYSTEM OF BEPCII Shifu Xu Xiangcheng Kong Qi Le Jijiu Zhao IHEP Chinese Academy of Sciences P O Box 918 10 Beijing 100039 P R China Abstract BEPC Beijing Electron Positron Collider is now upgrading to the BEPCI The BEPCII will serve high energy physics experiments and synchrotron radiation experiments which consists of a 1 55 1 89GeV_ linac accelerator two transport lines and a 1 2 8GeV storage ring The control system will upgrade using the Experimental Physics and Industrial Control System EPICS system The CANbus and ControlNet are chosen as the fieldbuses to communicate between the VME front end computers and the remote devices In order to utilize the CANbus devices of linac control system in BEPC we transferred the CANbus EPICS driver to EPICS system of BEPCII For some sub system of BEPCII we introduced ControlNet fieldbus and we use Allen Bradley programmable logic controller PLC as the remote controller In this paper we describe experiences with CANbus in linac control system of BEPCII and fieldbus ControlNet in a prototype system INTRODUCTION BEPCII which will be upgraded from BEPC consists of a 1 55 1 89GeV linac accelerator two transport lines and a 1 2 8GeV storage ring which is a double ring schema 1 To reach the goal of BEPCII the current control system should be upgraded The new control system is ba
5. nt The goal of software development is to get the following functions e Monitor the current e Mode operation All the current values of PSs called a kind of mode can be saved and restored for future us e Single PS s knob and ramping Adjust individual power supply When the setpoint is larger or smaller than the current value it should ramp to the setpoint e All PSs ramping mode When loading a new mode all the power supplies should ramp from the current values to the setpoints simultaneously 4 TT fexport home xust can display aed he Quadruple Magnet PS Control NAME SAMPLE SETTING REF ON OFF ALARM SET 12 01 11 84 11 84 ser 11 51 11 45 11 45 12 58 1253 1253 13 03 12 72 12 72 6 38 6 12 6 12 9 46 9 28 923 ser 7 63 7 24 7 24 EZ 10 88 1060 1060 ser 7 26 7 15 7 15 es 11 60 11 35 11 35 SET 10 53 1032 1032 17 59 17 55 17 55 ser 6 59 6 38 6 38 7 05 6 83 6 83 a ser 6 32 6 17 6 17 x 0 save rest e The power supply s parameter s backup and restore for example the power supply s online offline information e CAN bus status can be monitored and reported e Change the polarity of steering magnet power supplies The existing EPICS CAN bus device driver should be transferred according to the custom CAN bus node s protocol and the system s requirements The main change is that the EPICS database record instance db file should be able t
6. ntrolLogix PLC e Set up network parameters in RSNetworx e g Network Update Time NUT maximum scheduled address SMAX maximum unscheduled address UMAX etc e Use RSNetworx to set up the corresponding produced and or consumed connections The EPICS device driver for 5136 CN VME has been developed 7 and has been tested in the prototype system The OPI is developed using EPICS OPI tool EDM SNL and TCL TK EPICS real time database is designed using tool VDCT CONCLUSION The field bus CAN and ControlNet have been selected as the main field buses to control devices in the control system of BEPCII CAN bus has been successfully used in the upgrading of BEPC linac power supply control system and ControlNet has been tested in a prototype system These applications will be helpful for developing other parts of BEPCII control system REFERENCES 1 http bipcS ihep ac cn download pdr_download htm 2 CAN in Automation CiA http www can cia 3 http www aps anl gov asd people anj ipac 4 J Y Tang et al A Distributed and Collaborative PLC lab for SNS ICALEPCS 99 Trieste Italy p370 1999 5 H C Hesuh et al Design and Development of the SNS Ring Vacuum I amp C System PAC 01 Chicago USA p779 2001 6 http www controlnet org 7 http www sns bnl gov epics cnet
7. o access different analog channels Another change is that the driver should distinguish the ai record s processing and the read back of DA To monitor the CAN bus status from OPI a new type of record canstatus have been developed which can provide CAN bus status information CAN bus node error messages transmitted message counter received message counter error event counter bus off event counter etc The heart of IOC is a memory resident database together with various memory resident structures There are about 620 records resident in IOC EPICS database configuration tool VDCT is used to design the real time database which is a multi platform tool written in JAVA EPICS OPI tool EDM is used to build the controlling and monitoring screens which is ease to use and can build friendly HMI To realise the mode operation and parameter s backup and restore the script language TCL TK is used which is ease to integrated in EDM The important part of software development is to meet the requirements of single power supply s ramping and all power supplies ramping which is carried out using State Notation Language SNL SNL is component of EPICS which provides a simple and powerful tool for programming sequential operation in a real time control system An OPI screen is shown in figure 3 NAME SAMPLE SETTING REF ON OFF ALARM SET 11 88 11 74 11 74 933 934 934 9 02 8 96 3 965 9 31 9 30 9 30 8 68
8. sed on EPICS system which is non commercial and open source and a lot of applications for accelerator commissioning and operating can be shared with other laboratories To meet the budget requirements of BEPCII some existing parts should be merged into or transferred to EPICS system Before upgrading the fieldbus CAN 2 was used to control magnet power supplies of the linac because of its reliability ease of use and wide acceptance and support by industry In the new control system of BEPCIH the existing CAN bus devices are still employed because the EPICS CAN bus device driver already exists 3 What needs to be done is migrating the device driver to the new environment and developing application software using EPICS tools To control the vacuum interlock system injection power supplies and cryogenic system of BEPCH the field bus ControlNet is introduced and Allen Bradley PLC is used as the remote controller CANBUS IN LINAC POWER SUPPLY CONTROL SYSTEM Can Bus Node Device The CAN bus Node which is FB remote I O module is custom intelligent device It provides digital analog mixed 483 input output functions namely 8 channels of analog input AD 4 channels of analog output DA 8 channels of digital input and output DI amp DO It has the following features e It conforms to CAN2 0A standard e Adopting RJ 45 connector is very convenient e The digital analog I O channels are mixed in a board This is suitable for

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