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LiAM User`s Manual

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1. LiAM User s Manual Local Display 4 3 Automatic Load Recognition Page When launching the automatic load recognition procedure by sending an MTUNE r command to the unit the power supply will not respond to any other command until the procedure is over During this time interval 1e less than 13 seconds the power supply monitor will display the message shown in the following Figure 29 Figure 29 display screen when LiAM is running an automatic load recognition procedure O Remote Control LiAM User s Manual 5 Remote Control The LiAM power supply module can be remotely controlled via a standard Ethernet 10 100 link accessible from the module front panel using a predefined set of commands 5 1 Preliminary Information In order to ensure a correct communication with a LIAM module the following rules have to be pointed out e commands TO the LiAM power supply module must be sent with a r carriage return OxOD hexadecimal number termination character e replies FROM the LIAM power supply also have a r carriage return OxOD hexadecimal number termination character A complete list of commands except for reserved commands is herein presented and an overview for each command syntax and functionality follows The configurability of this power supply leads to a very widespread command list thus typical users may only need a small set of commands in order to run the LiAM unit in a s
2. KJ MAAT T TS MALL DLL IT All Rights Reserved CAEN ELS d o o Rev 1 3 October 2014 e CAEN ELS d o o Kra ka ulica 2 6210 Se ana Slovenija Mail info caenels com Web www caenels com Table Of Contents 1 EMM APIE N bdk Gi RE neers EE N EE OE OE OON 10 1 1 FAMOS PREVIEV se de cio cts cts GE essa sass ee oi A ie De ee 10 1 2 SS TEM SUCUT E Re EE 12 SAFETY AND INSTALLATION assesseer used wes sos N es Ged oi se ee N eed 15 2 1 GENERAL SAFETY INFORMATION esse esse sees sees sees ee ee ee ee ee ee ee ee ee ee ee 15 2 2 ENA TINS EC OE ses NN Ee ee EE Ge EE ie 15 2 3 INJURY PRECAUTIONS af see see esse ese ees ee ese ee ee ee ee 16 2 3 1 Caution eeen 16 24 GROUNDING ee 16 2 5 INPUT RATO 17 2 6 OUTPEUS ee 17 21 LE CIRCUITS RSR Re ER EE Re 17 2 8 PART REPLACEMENT AND MODIFICATIONS ees esse sees see sees a 17 2 9 INSTALLATION INSTRUCTIONS ge es ee ees se ee ee ee ee ee ee eee 17 2 9 1 Installation and Cabling Procedure Se 19 on Covers optional ss see ee ER 22 2 KGS TED CABLE SECTIONS memmen se se ees ees ee se eee 24 2 EER GE RAIL Fa N N MAN 24 mad CRIP TIGE eoooeeoossoooe do 26 3 1 MEAT DESCRIPTION uses ese sees sees ee se ee ee ee ee ae sea ee e D 26 MENEN nal Protections ns iE 27 jel EE arnal Inter GEN 32 EN interlocks ET 33 3 1 2 2 Interlocks Activation States es es es ee ee ee ee ee ee ee ee ee ee ee ee 33 3 1 2 3 Interloc
3. Microsoft Windows Versione 6 1 7601 Copyright c 2009 Microsoft Corporation Tutti i diritti riservati C UsersMit iadcd dic telnet 192 166 0 10 9999 m e now press Enter on the prompt to enter configuration menu i EE leet EEN MMM MAC address 0204AE04372 Software version V6 7 0 1 100420 XPTEXE Press Enter for Setup Mode e on the device Telnet based menu first select the Server option by inserting 0 and by pressing Enter on the prompt O Remote Control LiAM User s Manual Fa Telnet 192168010 N lojo Es Min notification interval 1 s a Re notification interval S Trigger 3 Serial elie input disabled hannel HS Ch Trigger Ponte Trigger input2 Trigger Lipura Message Priority L Min notification interval 1 s Re notification interval Os Change Setup erver Channel 1 E mail Expert Security Def aults Exit without save Save and exi Your choicel Om Md md DO ANOUIWHE e when asked for the IP Address please enter the desired new IP address for the power supply Please note that the IP address must be entered as 4 three digit number e g 192 168 0 1 11 Telnet 192 168 0 10 Soe Trigger 3 verja elit input disabled hannel HDanne Trigger ELE input 2 input3 notification interval 1 s Re notification interval 5 Change Setup erver Channel 1 E mail Expert Security Def aults Exit
4. AK r procedure running for 13 seconds and power unit ignoring all commands during this time interval MTUNE example when module is ON MTUNE r NAKV EZG Remote Control LiAM User s Manual 5 4 IP Address Configuration The LiAM power supply unit Internet Protocol IP address can be configured remotely using two different procedures The situations can be mainly two e the actual power supply IP address is known by the user In these case the new IP address configuration can be performed via a basic Telnet connection e the actual power supply IP address is NOT known by the user In these cases the new IP address configuration can be performed by using the Devicelnstaller soitware An overview of the procedures to be followed using the just cited methods is herein presented LiAM User s Manual Remote Control 5 4 1 IP Address configuration TELNET connection If the power supply IP address is known by the user it is also possible to configure the new IP address by using a simple TELNET connection The TELNET connection must be established to port 9999 of the Ethernet device of the power supply module Please carefully follow the instructions in order to correctly set change the IP address of the LiAM power supply module e establish a TELNET connection to port 9999 of the module IP address e g 192 168 0 10 p p p n RER X ER Amministratore Prompt dei comandi g h P Me m8 af enn EE a
5. LOW level while interlock 1 when its input is supplied from and external source HIGH level the value to be written to the EEPROM cell 49 is the following MWG 49 I r The sent string has to be so interpreted e J e e WE 1 EE Ma Interlock 2 Interlock 1 on t care on t care LOW HIGH In order to make this command taking effect it is necessary to perform a MUP r Module Update Parameters command see MUP command section for further details Content of the interlock enable disable mask i e EEPROM cell 48 overrides the content of the cell 49 so that the values contained in cell 49 are discarded if the corresponding bit in cell 48 is 0 and the interlock is disabled The MRG 49 r command returns a string containing the ASCII correspondent of the interlock enable mask and contains information about what interlocks are activated at a LOW state and what are activated at a HIGH state 3 1 2 3 Interlock Configuration Example Magnets can be water cooled and there is a usual need for an interlock in case of the water cooling system fault Let s consider a water flow switch that by choice can be connected to interlock 2 of a LIAM interlock connector on the rear panel Water flow switch signals needs to be connected between pins 4 and 3 of the rear interlock connector in order to activate only interlock 2 the following command need to be sent to the LiAM module MWG 48 2 r O LiAM
6. __ LiAM User s Manual Remote Control 5 3 25 MTUNE Command Automatic Tuning Procedure The MTUNE r command is used in order to launch the automatic load recognition procedure on the LiAM power supply It is strongly suggested to run this procedure the first time a new load is connected to the power unit so that internal parameters are optimized for working with that specific load e g automatic rail switching and some other controls In order to run the automatic load recognition process the following command must be fed to the power unit MTUNE r The LiAM power supply replies with an acknowledgment AK r command if the procedure is correctly launched Please note that during the automatic tuning process lasting for about 13 seconds the communication is suspended and the power supply Ethernet socket ignores all received commands At the end of this procedure if successful the power supply stores the value of the estimated resistive part of the load in its internal non volatile memory The LIAM power units reply with a non acknowledgment NAK r command when e the output is enabled e the power supply has experienced a fault Please note that in order to make the computed Resr value take effect in the module operation a MUP r command needs to be sent to the power supply unit at the end of the procedure Examples MTUNE example when module is OFF and no faults are present MTUNE r
7. Technical Specifications for LiAM 6005 current controlled bipolar power supplies are herein presented LiAM 6005 Rated Output Power 300 W 3 x 200VAC 10 47 63 Hz Maximum Inductive Load Current Setting Resolution Output Current Read Back Resolution 65 HA Input Voltage Output Voltage Read Back Resolution Output Ripple O00kH2 ANS Output Monitor Gain 2 V A 2 Inputs configurable External Interlocks States 1 Output indicates if module is ON OFF Over Temperature Over Voltage Internal Interlocks Regulation Fault AC Phase Fail Load Fault Load energy dumping crowbar Circuit breakers Internal Temperature Voltage Rails Fuses Hardware Protections Technical Specifications LiAM User s Manual Output Current Output Voltage Auxiliary ADC Read Backs Status Register Voltage Rail Voltages Internal Temperatures Estimated Resistive Load Remote Connectivity Ethernet TCP IP Firmware Update Extra Features Short circuit Stability Local Display p 2 5 display Mechanical Dimensions measured on 1mH lo U x 550 mm crate m with connectors 84 LiAM User s Manual Annex A Output Connectors Annex A Output Connectors Connections to the load must be carried out considering that the DC output connector pinout made by terminal blocks is presented in Figure 30 Figure 30 output connector pinout The corresponding pinout is e pin 1 positive output terminal e pin 2
8. The value section of the EEPROM is used to store calibration parameters identification thresholds interlock information etc and other user definable factors For more information on how to write parameters in the value area of the memory please refer to MWG Command section Replies from the LiAM power supply are in the following format cell_content r where e cell_content is the cell num content in an ASCII representation The MRG command being a reading command returns a response in any module condition Examples MRG example with cell num out of limits MRG 675 r i NAKV MRG example for cell 4 containing the maximum settable current limit A MRG 4 r S 1 r MRG example for cell 22 containing the module serial number MRG 22 r LIAM_130234 r O Remote Control LiAM User s Manual 5 3 6 MRI Command The MRI r command returns the readback value of the power supply actual output current Current readback values have a 18 bit resolution 17 bit sign and they are presented with a 5 digit precision Replies from the power supply controller to this command are in the following form MRI value r where e value is the output current value readback A The MRI command being a reading command returns a response in any module condition Examples MRI example when the module is OFF MRI r i MRI 0 00004 7 MRI example when the module is ON and regul
9. User s Manual LiAM Description A correct operation of the magnet cooling keeps the interlock input pins shorted while a fault has to be generated when the input becomes open a power source is needed with a pull up resistor the interlock 2 activation level needs to be set to HIGH with the following command MWG 49 2 r In order to make this settings take effect permanently since they are stored in non volatile memory a MUP r command needs to be sent to the power supply 3 1 3 Analog Current Monitor Each LiAM power supply has an output monitor signal that is fed to the rear panel BNC Bayonet Neill Concelman connector as shown in Figure 22 LE Figure 22 analog current monitor coaxial connector 7 This signal is a scaled version of the actual output current of the module and is directly obtained from buffering the current sensing circuit This output monitor rated at 10V can be very useful in order to check and debug the power supply current behavior directly with an oscilloscope The gain and bandwidth characteristics of this buffered voltage output are the following G V AZ2V A 0 51 f 3ap 50 kHz Please note that this signal being the connector directly mounted on the power supply chassis is ground referred and the maximum current that can be sunk sourced in order to maintain full output swing is rated at 5mA i e 2 kQ load resistor SSO LiAM Description LiAM User s Manual 3 2 Inter
10. service personnel 2 4 Grounding To minimize shock hazard the LiAM power supply unit must be connected to an electrical ground The ground terminal is present on the mains sockets on the back side of the crate and it is directly connected inside the chassis 0 oa LiAM User s Manual Safety and Installation 2 5 Input Ratings Do not use AC supply which exceeds the input voltage and frequency ratings of this instrument For input voltage and frequency rating of the module see Chapter 0 For safety reasons the mains supply voltage fluctuations should not exceed above voltage range 2 6 Output Connectors Do not plug or unplug output connections when power converters are on and the power units are regulating current on the electrical load 2 7 Live Circuits Operating personnel must not remove the 19 crates covers NOR touch the external terminal screw connection that may be supplied at dangerous potential No internal adjustment or component replacement is allowed to non CAEN ELS d 0 0 personnel Never replace components with power cables connected In order to avoid injuries always disconnect power plugs directly from the wall mains discharge circuits and remove external voltage source before touching components wait 5 minutes at least 2 8 Part Replacement and Modifications Always disconnect power terminals discharge circuits and remove external voltage source prior to fuse replacement wait 5 minutes at le
11. simultaneous setting of the fault bit Interlock 2 bit 6 this bit is set when the corresponding enabled external interlock trip This bit does not give any information about the activation state of the interlock signal 2 The setting of this bit implies the simultaneous setting of the fault bit Regulation Fault bit 7 this bit is set when a regulation fault is experienced The setting of this bit implies the simultaneous setting of the fault bit Rail Undervoltage bit this bit is set when an under voltage condition of one of the voltage rails 1 e voltage drops below a user defined threshold has been recognized As in other cases the setting of this bit implies the simultaneous setting of the fault bit Load Fault Status bit 9 this bit is set when a load fault condition appears this can be caused by an earth leakage current or an unknown change in the load resistance As in other cases the setting of this bit implies the simultaneous setting of the fault bit Over Voltage bit 40 this bit is set when an over voltage condition has been experienced on the output terminals of the LiAM unit on thus on the load if correctly connected The setting of this bit implies the simultaneous setting of the fault bit Rail Status 0 1 bit 12 13 the LIAM power supply unit has an adaptive behaviour of the voltage rails used to supply the output stage Voltage rails can be switched among thr
12. the Modules due to negligence on behalf of the User It is strongly recommended to read thoroughly this User s Manual before any kind of operation CAEN ELS d o o reserves the right to change partially or entirely the contents of this Manual at any time and without giving any notice Disposal of the Product The product must never be dumped in the Municipal Waste Please check your local regulations for disposal of electronics products LiAM User s Manual Read over the instruction manual carefully before using the instrument The following precautions should be strictly observed before using the LiAM Do not use this product in any manner not specified by the manufacturer The protective features of this product may be impaired if it is used in a manner not specified in this manual e Do not use the device if it is damaged Before you use the device inspect the instrument for possible cracks or breaks before each use e Do not operate the device around explosives gas vapor or dust e Always use the device with the cables provided e Turn off the device before establishing any connection e Do not operate the device with the cover removed or loosened e Do not install substitute parts or perform any unauthorized modification to the product e Return the product to the manufacturer for service and repair to ensure that safety features are maintained CAUTION e This instrument is designed for indoor use and in area
13. with low condensation LiAM User s Manual The following table shows the general environmental requirements for a correct operation of the instrument Environmental Conditions Operating Temperature Operating Humidity Storage Temperature Storage Humidity Requirements 5 C to 45 C 30 to 85 RH non condensing 10 C to 60 C 5 to 90 RH non condensing Introduction LiAM User s Manual 1 Introduction This chapter describes the general characteristics and main features of the LiAM linear bipolar power supply unit 1 1 LiAM Overview This power supply system ior electromagnets is a compact linear current controlled power supply system named LiAM 6005 Linear Amplifier Module 60V 5A The unit is designed in order to have true bipolar operation 1 e real zero crossing that allows smooth transitions around the zero current level Low noise and high stability are the main characteristics of these bipolar modules in order to obtain maximum performances on the relatively generated magnetic field in the accelerator facility The input ratings of the power supply unit are three phase 180 220VAC 50 60Hz adaptable to either the Japanese or US mains distribution network Single phase versions for the European market are available upon request Output current and output voltage values are displayed on a large display placed on the module front panel LEDs also placed on the module front panel give i
14. without save Save and exit Your choice IP Address 192 192 168 168 000 010 111 OO JO UT SD e Press the Enter key until reaching the Your choice screen again Now insert 9 ie Save and exit and press Enter again ia p mar Telnet 192 168 0 10 F Fi Server Channel 1 E mail Expert Security Def aults Exit without save Save and exit Your choice Le Address 192 192 168 168 000 10 111 Set Gateway IP Address Retmssk Number of Bits PA Host Part Q default 8 et DNS Server IP addr N art oN Telnet Web Manager LLE N KO O0 LOUT SD hange Setup erver Channel 1 E mail Expert Security Defaults Exit without save Save and exi Your choice E RE The device should now reboot in order for the changes to take effect O LiAM User s Manual Remote Control 5 4 2 IP Address configuration DeviceInstaller If the power supply IP address is not known by the user the best way to find out and to configure the module IP address is to use the Devicelnstaller software The Devicelnstaller software can be downloaded for free from the Lantronix website www lantronix com The LiAM modules can be connected to a global LAN or point to point recommended in order to obtain minimum delays maximum speed performance and to avoid possible communication problems Please note that for a point to point direct connection a twisted Eth
15. 1 set C I set Co 1 set c3 1 set Imax Col read c I read c I read C3 read Co V_read c V_read Cc V_read c3 V_read reserved Max Temperature Load Resistance Serial Number AC Phase Undervoltage Protection Rail Switching Voltage Threshold Rail Switching Voltage Hysteresis Calibration Date Identification reserved Slew Rate A s reserved Regulation fault threshold A reserved Load fault threshold V Load fault and regulation iterations reserved Interlock Enable Disable Mask Interlock Activation State Mask LiAM Description Description Zero order current calibration coefficient 1 order current calibration coefficient 2 L_order current calibration coefficient 3 _order current calibration coefficient Maximum settable current set point Zero order current calibration coefficient 1 order current calibration coefficient 2 L_order current calibration coefficient 3 d order current calibration coefficient Zero order voltage calibration coefficient 1 order voltage calibration coefficient 2 4 order voltage calibration coefficient 3 _order voltage calibration coefficient Maximum heatsink temperature Load resistive part value Module serial number Under voltage protection threshold 13 5V Voltage threshold for switching rail voltage Voltage hysteresis on rail value Date of last calibration Module identification name Module slew rate value Maximum allowable regulation fault current Maximum allowable voltage differ
16. 3 this value V defines the voltage threshold below what the power supply generates an AC fault condition Rail Switching Voltage Threshold cell 24 this value V defines the centered value of the voltage threshold that switches the rail voltages to a higher or lower level in order to optimize power dissipation Rail Switching Voltage Hysteresis cell 25 this value V defines the voltage hysteresis that enables the rail voltages to a higher or lower level in order to optimize power dissipation This voltage hysteresis value was especially implemented in order not to have continuous rail switching when working at voltage levels close to threshold defined in cell 24 Calibration Date cell 26 this value a string contains the date of the last calibration of the LiAM The name of the magnet connected or its identification can be directly written into this cell Identification cell 27 this value a string defines the LiAM module identification name and can be read withthe MRID t command The name of the magnet connected or its identification can be directly written into this cell Slew Rate cell 30 this value A s determines the slew rate value of the power supply The module ramps using the command MRM r at a defined set point with this pre defined value of slew rate Regulation Fault Threshold cell 37 this value A defines the maximum allowable value calculated as the difference from t
17. AK r or NAK r this non acknowledgment reply is generated as it is for the MRM command when e the set value is out of range the maximum settable current value is user defined and stored in EEPROM cell 4 e _ the module is OFF it is necessary to turn the module ON first e the module performing a ramp it is necessary to wait for the power supply to end the previous ramp or a waveform Examples MWI example with the module OFF MWI 3 55679 r H NAK r MWI example with the module ON and already regulating MWI 1 32 r AK r Remote Control LiAM User s Manual 5 3 24 PASSWORD Command The PASSWORD command can be used to unlock the internal EEPROM cells that are password protected in order not to let inexperienced users to change some power supply parameters that might compromise the correct operation of the module See Internal Memory Mapping section for further details on password protected cells These cells are accessible only to CAEN ELS d o o personnel or to experienced users The correct form format for this command is as follows PASSWORD password r where e password is the module password to unlock protected EEPROM cells Replies from the power supply are in the form AK r or NAK r this non acknowledgment reply is generated when the written password is incorrect Examples PASSWORD example with a wrong password PASSWORD elephant r NAK 7 a
18. Hz EE Introduction LiAM User s Manual Ethernet External Interlocks Analog Output Monitor Auxiliary PS 5A 60V Three phase A Digital Linear Input Logic Output And stage Control Three Phase Transformers Output Stage Power Figure 3 simplified block diagram of the LiAM unit LiAM User s Manual Safety and Installation 2 Safety and Installation Please read carefully this general safety and installation information before using the product 2 1 General Safety Information This section contains the fundamental safety rules for the installation and operation of the system Read thoroughly this section before starting any procedure of installation or operation of the product Safety Terms and Symbols on the Product These terms may appear on the product e DANGER indicates an injury hazard immediately accessible as you read the marking e WARNING indicates an injury hazard not immediately accessible as you read the marking e CAUTION indicates a hazard to property including the product 2 2 Initial Inspection Prior to shipment this system was inspected and found free of mechanical or electrical defects Upon unpacking of the system inspect for any damage which may have occurred in transit The inspection should confirm that there is no exterior damage to the system such as broken knobs or connectors and that the front panels are not scratched or cracked Keep all packing material until the inspectio
19. Manual 3 LIAM Description A description of the LiAM module is herein presented with some in depth explanations on the basic power supply functionalities 3 1 General Description The LIAM power supply front panel Figure 17 presents the three phase circuit breaker two holes for the air inlet necessary for the front to rear fan cooling system a standard RJ 45 Ethernet socket a local display a rotary encoder with push button capability a small hole for accessing the local unit reset and four LED indicators Figure 17 LiAM module front view As can be seen from the following picture Figure 18 the Ethernet communication has two different integrated LEDs i e Activity and Link that present the behavior described in Table 2 Activity LED Meaning Off No activity Amber Half duplex Green Full duplex Link LED Meaning Off No link Amber 10 Mbps Green 100 Mbps Table 2 RJ 45 indicators LiAM User s Manual LiAM Description Activity LED Link LED LIAM 6005 FAULT AC OK DIAGNOSTICS OUTPUT Figure 18 LiAM front panel details The LEDs are indicators of the power supply status and have to be interpreted as follows e FAULT LED the red light indicates that the LiAM module has experienced a generic fault that can be either an internal protection trip or an external interlock intervention This light does not turn off after a fault until a unit status register reset has been perf
20. Manual LiAM Description 3 1 1 1 Voltage Rail Fuses The current drawn from the voltage rails both positive and negative is protected by fuses The rated fusing current is 8A T and both the fuse holders are accessible from the module rear panel and can be substituted Installed fuses are 5 x 20 mm format 3 1 1 1 Circuit Breaker The circuit breaker placed infront of the power supply unit allows users to turn on and off the LiAM power unit and also protects it from faults caused by transformers malfunctions and or short circuits The circuit breaker turns the power supply off if a fault condition arises The circuit breaker position should be found as shown in Figure 19 after a fault condition i e set to 0 Figure 19 input circuit breaker 3 1 1 1 Rails Under voltage Protection The module voltage rails are continuously monitored by the internal logic in order to verify their correct operation If at least one of the two voltage rails positive and or negative drops below a pre defined threshold the module signals a fault condition This fault protection always trips whenever a voltage rail fuses has blown 3 1 1 1 AC Phase Fail If at least one of the phases is missing the module internal protection of AC phase fail trips and generates a fault condition that automatically turns the module output off The AC OK green light on the module front panel turns off every time this fault occurs When all three input pha
21. T FAULT MODULE ON mm N OO AU Aan Aa Table 5 16 bit 2 byte internal status register The status register value can be directly read by users using the MST r command The returned item is a 2 digit hexadecimal ASCII string corresponding to the equivalent status register A brief description of all the binary flags is here presented Module ON bit 0 this bit is set if the module is enabled and correctly regulating output current Fault bit 1 this bit is set if the module has experienced a fault e g generated by an external interlock or an internal protection trip and the status register has not been reset AC Fault bit 2 this value is an AC fault condition is present e g a phase loss O LiAM User s Manual LiAM Description Over Temperature bit 3 this bit is set when an internal over temperature condition has been experienced The setting of this bit implies the simultaneous setting of the fault bit Crowbar bit 4 this bit is set when the voltage at the output terminals of the module triggers the crowbar protection see Internal Protections section for further details The setting of this bit implies the simultaneous setting of the fault bit Interlock 1 bit 5 this bit is set when the corresponding enabled external interlock trip This bit does not give any information about the activation state of the interlock signal 1 The setting of this bit implies the
22. This feature is necessary when having large current in large inductive loads since the energy that gets stored into the load can be of a large entity and it could cause problems and damages A monitor output rated at 10V for a 5A output current is also present on the rear panel of the power supply on a BNC connector and it can be used for external monitoring purposes The cooling of the LiAM 6005 a critical task when using linear power supplies is performed by speed regulated fan forced air convection with a front to rear direction Other features of the LiAM power units as remote firmware upgrade short circuit stability etc are further on described in this manual EE Introduction LiAM User s Manual 1 2 System Structure A LiAM 6005 power supply unit Figure 1 is composed by a standard 2U 19 crate with a depth of 550 mm a maximum of 578 mm considering also AC input interlocks and output terminal connectors Figure 1 front view of a LiAM 6005 unit On the rear side of the power supply unit are visible the air outlets for cooling output connection terminals interlock and output status connector three phase inputs rail fuses and the analog output monitor coaxial connector Output Monitor Three phase Input Output Terminals Interlocks and output status Figure 2 rear view of a LiAM 6005 unit Channel interlock and current output connectors AC line input and DC Link power and
23. ails Figure 28 Readout display screen when module is ON and regulating 1 A current 47 Local Display LiAM Users Manual This field is factory defined as LIAM XXXXXX where XXXXXX are digits 0 to 9 representing the serial number of the power supply module The second line shows the internal readback of the module actual output current value with a resolution of 100 uA on the displayed value The third line shows the internal readback of the module actual output voltage value with a resolution of 100 uV on the displayed value The fourth line indicates the status of the power supply unit This status can be one of the following OK the module 1s correctly operating FAULT the module has experienced a fault condition The fault condition can be caused by either an internal protection trip e g AC fault over temperature condition etc or an external fault i e external interlocks The Status FAULT indication is always combined with the red FAULT light ht up on the module front panel A remote reset of the power supply status register must be performed in order to clear this status only if the conditions that generated the fault had been removed Please note that the Status OK indication does not indicate that the module is turned on and or sinking sourcing current to the load the indication of the ON status of the power unit can be monitored by the blue OUTPUT light on the front panel O
24. alibration parameters identification thresholds etc and some cells are password protected Replies from the power supply are in the form AK r or NAK r this non acknowledgment reply is generated when e the cell number cell num is out of range negative or greater than 511 e he selected cell is password protected In order to make changes take effect a MUP r command must be sent to the power unit if not these changes will take effect at the next LiAM reset or power cycle Examples MWG example of a correct write cell 4 and changes taking effect immediately MWG 4 3 8 r i AK r MUP r AK r MWG example cell 1 is password protected MWG 1 1 234 r NAK 7 TOE LiAM User s Manual Remote Control 5 3 23 MW Command The MWI command can be used to set the output current value and it is used when fast set point changes are needed The use of this command is alternative to the MRM Module RaMping the power supply reaches the desired output current value just using the internal analog PID regulator parameters without ramping with the pre defined slew rate to the new set point This command is usually needed when running feedback related applications and for small changes in the output current The correct form format for this command is as follows MWI value r where e value is the desired output current value A Replies from the LIAM power supply are in the form
25. and MRESET r e the module output is already ON Examples MON example when the bulk power supply is enabled ON and no fault conditions MON r AK r MON example when the system is already ON MON r NAK r Remote Control LiAM User s Manual 534 MRESET Command The MRESET r command has to be used in order to perform a complete reset of the module status register this 1s needed for example to enable the channel output again after a fault condition has been fixed In order for the power supply to keep its status register values reset it is necessary that the cause of the previous fault condition if any has been removed Reply from the LIAM module is always AK r except 1 the module is off in this case the power unit replies witha non acknowledgment NAK r Examples MRESET example MRESET r AK r LiAM User s Manual Remote Control 535 MRG Command The MRG r command returns the value stored in the value parameter of a desired internal memory EEPROM cell The correct form for the reading request is as follows MRG cell_num r where e cell num is the EEPROM cell number The on board EEPROM memory used to store module information as calibration parameters identification thresholds has 512 cells so that cell num is limited between O and 511 requests containing cell values exceeding these limits obtain a non acknowledgment reply NAK r
26. and The MRN r command returns the value of the negative power rail voltage i e negative DC Link Readback values have a unipolar 12 bit resolution Replies from the LiAM power supply unit to this command are in the following format MRN value r where e value is the measured DC Link voltage V Even if the internal ADC dedicated to this purpose has a 12 bit resolution this value is presented to the user only with a 100 mV resolution The MRN command being a reading command returns a response in any module condition Examples MRN example when the rail voltages are disabled MRN r MRN 0 0 r MRP example when the negative rail is at mid level voltage MRN r MRN 53 6 r O LiAM User s Manual Remote Control 5311 MRR Command The MRR r command returns the estimated value of the connected load resistive part obtained directly from an Automatic Load Recognition procedure strongly suggested or directly written by the user Please check the MTUNE r command for further information on how to run this procedure Replies from the LiAM power supply unit to this command are in the following format MRR value where e value is the measured resistance Link voltage Q The resistance value is computed from the current and voltage readback values and it is presented with a 4 digit precision The MRR command being a reading command returns a response in any module condition E
27. ast Other parts substitutions and modifications are allowed by authorized CAEN ELS d o o service personnel only 2 9 Installation Instruetions Follow these instructions in order to correctly install the LiAM power supply system PLEASE READ THIS SECTION CAREFULLY IN ORDER TO AVOID ANY SHOCK HAZARD Install the 2U LiAM 6005 system crate in a standard 19 cabinet as shown in the following Figure 4 EZG Safety and Installation LiAM User s Manual carne EEN LIAM 6005 Figure 4 installation of LiAM units in a 19 cabinet The three phase input connections i e earth and the three lines L1 L2 and L3 are placed ona terminal block connector on the rear of the crate as shown in Figure 5 Figure 5 rating plate and three phase input terminal connector The power supply rating plate can be found on the rear panel of the LiAM power unit indicating input ratings 3 x 200 VAC 10 50 60 Hz 550W input power ZA WARNING A Please connect the EARTH cable to the terminal connection marked with the following symbol FIRST oa LiAM User s Manual Safety and Installation A WARNING AY BE AWARE THAT ONCE CONNECTED THE AC VOLTAGE LINES Z1 L2 and L3 are ACCESSIBLE FROM THE REAR SCREW HOLE TERMINALS AS INDIGATED IN THE FOLLOWING FIGURE Figure 6 screw terminals at dangerous potential NEVER connect LI L2 and L3 lines if AC power is present on the corresponding cable
28. ating MRI MRI 2 34563 r TO LiAM User s Manual Remote Control 5 3 7 MRID Command The MRID r command returns the LIAM module identification name as a string The reply from the power supply contains the value stored in cell 27 of the module EEPROM and it assumes the following format module 1d r where e module id is the module identification stored in non volatile memory as an ASCII string This command is equivalent to the MRG 27 r command being the cited cell content the user selected module identification name The identification of the module can either be the power supply serial number a user defined name or the reference name of the magnet that the corresponding LiAM unit supplies very useful in large installations The MRID command being a reading command returns a response in any module condition Examples MRID example with the module identification SkewMag1 3 MRID r SKEWMAG1 3 r Remote Control LiAM User s Manual 5 3 8 MRM Command The MRM command is used to set the value of the desired output current set point MRM value r where e value is the output current desired set point A The difference between the MWI r command and the MRM r command is that the first one generates a direct change in output current while the second one makes the power supply go from the previous to the actual current value performing a ramp defined by a s
29. atisfying way 5 2 List of Commands The user available commands as well as a brief description and their read or write functionality are summarized in the following table Table 6 Command Description Read Write FDB Feedback command W MOFF Turn the module OFF W MON Turn the module ON W MRESET Reset the module status register W O 50 LiAM User s Manual MRG MRI MRID MRM MRP MRN MRR MRT MRV MRW MSP MSR MST MTUNE MUP MWG MWI PASSWORD VER Read selected EEPROM value cell Read output current value Read module identification Set output current value ramp Read positive rail voltage value Read negative rail voltage value Read estimated resistance value Read output stage maximum temperature Read output voltage value Read estimated active output power value Read last stored output current setpoint Read or write slew rate value Read module internal status register Launch automaticdoad tuning procedure Update all EEPROM parameters Write selected EEPROM value cell Set output current value no ramp Write password to unlock password protected cells Read module model and installed firmware versions Table 6 LiAM module command list Remote Control z 22227977 2272 wR EDD DZ ZJ It is important to notice that some commands are write only commands e g MWI to set output current and some others are read only commands e g MRI to read output current value The only command tha
30. based on the cascade of a linear three phase AC DC stage and a linear current controlled output stage particular technique allows for automatic rail switching i e voltage rails switch between different voltage levels in order to optimize efficiency an also a dedicated automatic load recognition procedure was implemented see dedicated sections for further details Auxiliary AC DC and DC DC power supplies are also linear in order to avoid any switching noise that could be generated by the device Linear transformers are optimized to reduce magnetic flux leakage that could cause EMI Electro Magnetic Interference Control of the output current is made by a high resolution and low drift Digital to Analog converter DAC that sets a resolution of about 160uA on the module output current setpoint Current sensing is performed with a particular array of precise shunt resistors that guarantees extremely low temperature drifts and excellent linearity External configurable interlocks are also provided on the LiAM 6005 rear panel in order to have the power supply connected if needed to some external devices safety circuitries A solid state status output is also available on the rear panel of the device it allows the monitoring of the module output stage enabled disabled by opening closing a contact A load energy protection damping circuit is implemented in order to protect the power supply and the load from over voltage conditions
31. before disabling the output drivers so that the maximum time for the power unit to turn off from its maximum current value is Is this is done in order to avoid voltage overshoots that would be anyway smoothed and limited by the crowbar especially for high currents on strongly inductive loads Replies from the power supply module to a MOFF r command are in the acknowledgment form AKV Sending a MOFF r command when the module output is already disabled generates an acknowledgment response i e AK r Examples MOFE example when the LiAM module output is already disabled MOFF r AK r MOFF example when the LiAM module is ON and supplying current MOFF r AK r S LiAM User s Manual Remote Control 5 3 3 MON Command The MON r command is intended to turn on the LIAM output thus enabling the output current terminals and allowing the power supply to regulate and feed current to the connected load After the reception of an MONV command the power supply automatically sets output current to OA zero when enabling the output Replies from the power supply to a MOFF r command are in the form FAK r when the command is correctly executed or NAK r The NAK r reply is obtained if e the LiAM unit isin a FAULT condition it is necessary to reset the status register after a generic fault condition in order to turn the power supply ON again see comm
32. control signals are all available on the SY3634 rear panel as shown in Figure 2 OEE LiAM User s Manual Introduction The LIAM 6005 Linear Power Supply main block diagram with its principal features is hereafter presented in Figure 3 The proposed control scheme is a well known topology that guarantees high stability and high reliability for the entire system The three phase transformers convert the mains input power rated at 200VAC and 50 60 Hz to different DC voltages Vpp Vpp and V aux and they act as the main AC DC section Please note that for safety and protection issues all input phases are protected with circuit breakers carefully read Installation section in order to safely and correctly install LiAM 6005 power units The Vaux voltages are used to power up the control electronic sections of the power supply and are obtained from different windings with respect to the power voltages The digital control section of the LIAM 6005 takes care of the general power supply diagnostics the interfacing to the Ethernet communication module the control of the DAC the display handling and some other tasks Module can perform waveforms as sine or square waves or any other user defined waveform controlling the LIAM 6005 via Ethernet connection this can easily be performed by transmitting to the power supply the desired waveform on a point by point basis the maximum data rate frequency for the set points is more than 100
33. controller to this command are in the following form MSP alue r where e value is the last stored The MSP Ss a response in any module condt Exam MSP MSP 456 r 69 Remote Control LiAM User s Manual 5 3 16 MSR Command The MSR command it is the only read write command for LiAM and allows reading and setting of the value of the slew rate in A s of the power supply The reading command is structured as follows MSR V and the related reply format is MSR value where value is actual slew rate value for the power supply A s that is the content of the EEPROM cell 30 with a 5 digit precision The value of the slew rate can also be set between lower limit of 0 A s and upper limit of 100 A s using the MSR command and adopting the following syntax MSR set value r where set value is desired slew rate value A s The MSR setting command generates upon reception an acknowledgment Le AK r reply if the value is correctly set and with a NAK Mr if e the set value is incorrect e g out of limits e he module is still performing a ramp it is necessary to wait for the power supply to end the previous ramp Examples MSR reading example MSR r MSR 15 00000 7 MSR setting example with a value out of limits MSR 13005V NAK r MSR setting example to a correct value MSR 5 5 r AK r O LiAM User s Manual Remote Cont
34. e protection e AC phase fail e Over temperature e Output over voltage e Regulation fault e Load fault Protection redundancy ie hardware and software was especially implemented in order to guarantee a double level of reliability for the specified type of power supplies An overview of all available protections as well as a brief description of their behavior is presented in the following sections 3 1 1 1 CB CrowBar The LiAM module protection against output over voltage conditions is guaranteed by a crowbar protection circuit that as in the case of the over current protection one has a double level of reliability 1 e both hardware and software This protection is hardware activated when the output voltage crosses a threshold of about double rating with respect to the maximum output voltage VCB TH 130V that is usually caused by a large di t dt value on a large reactive load The crowbar circuit also guarantees dissipation of the residual energy stored in the load when turning off the power supply output stage from a high current value on a high inductive load 1 e 5A on a 100mH magnet This protection also activates a galvanically isolated logic signal that generates a firmware interrupt on the on module Digital Signal Processor when this signal is activated the processor sets a flag in the status register that needs to be reset before re enabling the channel output again ao LiAM User s
35. ee different levels i e off mid voltage max voltage increasing the overall efficiency and making it similar to a Class G amplifier If these bits are set to OO the rails are off if set to Ol are at mid voltage and if set to 10 are at max voltage level Ramp Execution Flag bit 4 this bit is set when the LiAM unit is performing a ramp to a new set point After the ramp is finished and the new set point is reached this flag is cleared Turning Off bit 15 this bit is set while the LIAM module is turning off The power supply in order to avoid undesired over voltage due to the connected inductive load turns the output off by following a smooth behaviour i e ramps down to zero current level with a pre defined slew rate of 5A s O LiAM Description LiAM User s Manual 3 4 Adaptive Rail Switching The LiAM power supply is designed in order to obtain minimum irradiated and conducted noise by using linear AC DC stages linear DC DC stages and analog control loop of the output current In order to optimize the overall efficiency of the unit thus reducing internal power dissipation and cooling and increasing reliability an adaptive technique of voltage rail switching was especially implemented The output stage is composed of a linear bipolar true zero crossing power circuit configuration which sources or sinks current from two symmetrical voltage rails 1 e positive and negative An int
36. ee ences 71 5 3 18 MUN TE N ees ese 72 5 3 20 ad Mo ae AA AE EO ese 73 5 3 22 MV O SCN MM AA On ee 74 55 23 MEE Geopende EE EE mn 75 5 3 24 weer A 76 5 3 25 MTUNE Command Automatic Tuning Procedure 77 5 4 IP ADDRESS CONFIGURATION ees sees esse ees see ee see dee ee ee de eee en oons 78 5 4 1 IP Address configuration TELNET connection ee ees ese see sees ee see 79 5 4 2 IP Address configuration Devicelnstaller ee RR en S1 6 TECHNICAL SPECIFICATIONS secs 000 000 0 0000 000 0 0000 000000 dd oo ee 83 ANNE GET PUT CONNECTORS eeoeeossesseossossessesssossossesseooo M T ERNE 85 00 February 1 2013 OL February 26 2013 First draftrelease 7 LO March 82013 Firstrelease ___ explanation EN February 10 2014 Output and Input power protection cover added 13 October 307 2014 Manual graphics changed 0 1 1 0 1 1 1 2 1 3 LiAM User s Manual Safety information Warnings CAEN ELS will repair or replace any product within the guarantee period if the Guarantor declares that the product is defective due to workmanship or materials and has not been caused by mishandling negligence on behalf of the User accident or any abnormal conditions or operations Please read carefully the manual before operating any part of the instrument ZN WARNING A High voltage do NOT open the boxes CAEN ELS d o o declines all responsibility for damages or injuries caused by an improper use of
37. enabling disabling mask the two external interlocks are numbered from 1 and 2 Example if only interlock 2 has to be enabled the following command needs to be sent to the power supply MWG 48 2 r The sent string has to be so interpreted pt 1 En EE Interlock 2 Interlock 1 EL ao Le Enabled Disabled In order to make this command taking effect it is necessary to perform a MUP r Module Update Parameters command see MUP command section for further details The MRG 48 r command returns a string containing the ASCII correspondent of the interlock enable mask and contains information about what interlocks are enabled and what are disabled 3 1 2 2 Interlocks Activation States Each LiAM external interlock can be chosen to trip at a HIGH or a LOW logic level A value of 1 means that the interlock trips when the input signal to the corresponding interlock is shorted and a 0 that the corresponding interlock trips when the input is open LiAM Description LiAM User s Manual The value to be written is the ASCII string formed by 2 hexadecimal digits that corresponds to the binary activation state mask the eight external interlocks as for the interlock enable disable mask are numbered from 0 to 7 Example consider that both interlocks 1 and 2 are enabled i e a 3 string is contained in the EEPROM cell 48 and interlock 2 needs to trip when the corresponding input signals are shorted
38. ence Number of iterations to trip faults Enabling disabling external interlocks Definition of external interlocks active state Table 4 internal EEPROM Value section Please note that cells marked in blue are password protected 37 LiAM Description LiAM User s Manual All settable parameters either password or non password protected need to be updated in order to take immediate effect on the module operation a MUPMr command needs to be sent to the LiAM module after all parameters have been set by MWG commands Please note again that cells marked in blue are password protected and need to be unlocked in order to write their content Please refer to Table 4 and to write values to configure correctly the LiAM module and note that the command to be used is MWG command to write the respective value cell content The LiAM power unit controller automatically handles EEPROM addresses for the value cell section so that the MWG command is almost transparent to the users and there is no need to write complicated cell addresses Example suppose that the maximum settable current Imax for the specific LiAM module has to be changed to 3 88A Referring to Table 4 this value is not password protected and it is placed at value section cell number 4 The following command needs to be sent to the LiAM unit MWG 4 3 88 r and should receive an acknowledgment reply from the power supp
39. erlock 1 Solid State Relay return A UM B N Solid State Relay Table 3 rear interlock terminal connector pinout This connector is a 6 position terminal block type connector The corresponding pinout is shown in Figure 21 Figure 21 interlock terminals on LiAM rear panel Please notice that all interlock pins are galvanically isolated irom ground and from outputs terminals nevertheless the absolute maximum voltage referred to ground that pins can sustain is 13V En 0 LiAM User s Manual LiAM Description Note The absolute maximum current that can be sunk sourced by the output status relays solid state relay pins 5 and 6 is LOOmA Interlock 1 the displayed interlock name shown on the front display can be changed with the user requirements see MWF command and Memory mapping sections for further details is hardware activated when at least high level LVTTL 3 3V are applied between pin 2 and return pin 1 Suggested cable section for interlocks and output status connections is 0 25 mm i e 23 AWG 3 1 2 1 Interlocks Enabling Disabling Each LiAM external interlock can be enabled and disabled by writing to the interlock enable mask to the EEPROM cell 48 A value of 1 means that the interlock is enabled while a 0 value that the corresponding interlock is disabled The value to be written is the ASCII character formed by a single hexadecimal digit which corresponds to the binary
40. ernal automatic rail switching technique allows the rails of the units to switch between three different voltage levels OFF MID voltage HIGH voltage This technique works correctly in conjunction with the automatic load recognition function i e MTUNE r and yields a predictive switching of these rail values in a completely transparent way for the users taking part of the advantages of class G amplifiers even though the LIAM is not a class G En LiAM User s Manual LiAM Description 3 5 Automatic Load Recognition An automatic procedure to estimate load resistive value was implemented in order to guarantee more efficient and safe operation on the LiAM power supply units By running the MTUNE command the power supply automatically start a procedure that recognizes the connected load resistive value by setting the output current to pre defined levels 1A value then measuring the output voltage and storing the content in the internal non volatile memory Once launched the entire procedure last 13 seconds so that the module communication is not accessible by the user during this time interval The procedure result is Resp Q computed as follows Vour Rest T OUT where Vour and lour are the output voltage V and output current A readback values respectively Maximum value for Rgsr Is 250 This resistance value is then stored only if the process is successful in the module internal me
41. ernet cable must be used The next few steps must be followed in order to assign a new IP address to the LiAM 6005 module e Connect to the desired LIAM module with a twisted Ethernet cable e Verify that the Link LED on the RJ45 connector is turned on amber for a 1OMbps connection or green for a 100Mbps connection e Launch the Devicelnstaller program e Select the XPort device where you want to change the IP address S Lantronix Devicelnstaller 4 1 0 3 File Edit View Device Tools Help Deed Search Assign IP Upgrade Sa Lantronix Devices 1 device s Device Details Web Configuration Telnet Configuration 5 aig Local Area Connection 140 105 8 160 Port on oe EE ay Name Group Comments Device Family Port Type Port 03 ID x5 Hardware Address 00 20 44 93 F6 86 Firmware Yersion Extended Firmware Version 6 1 0 0 e Click on the Assign IP icon S Lantronix Devicelnstaller 4 1 0 3 File Edit 4 Device Tools Help a ps a waan Devices 1 devicels Device Details Web Configuration Telnet Configuration ais Local Area Connection 140 105 8 160 a ee AE N o Port on je XPort 03 firmware v6 1 0 0 P se E may Name Group Comments Device Family Port Type Port 03 ID x5 Hardware Address 00 20 44 93 F6 86 Firmware Version Extended Firmware Version 6 1 0 0 e Select Assign a specific IP address and then click Next Remote Cont
42. ful in order to check if all the loads connected to the power supplies in a large facility installation are correct and recognizes abnormal load variations Considering Jour as the output current readback value Isgr as the last stored setpoint and Iry as the pre defined threshold the regulation fault trips if the following condition 1s verified Rest lour Vour gt Vry where Rgsr is the estimated load resistive value computed running the function MTUNE r The actual real resistive value can be then be expressed by the following relation Vout Rroap lour By substituting this last equation into the previous one the load fault condition can be further expressed as follows Vry lour Resr Rroapl gt Rest Rroap gt AR where AR V lou and can be considered as the maximum allowable and acceptable load variation ZZZ LiAM Description LiAM User s Manual This fault could trip for example if the connected load changes after the last time an MTUNE r procedure was ran on the power supply this fault helps keeping the installation correctly into operation as planned 3 1 2 External Interlocks Each LiAM power supply module has two different input interlocks and an output status signal contact couple that are directly available on the rear panel interlock connector The pin index is summarized in Table 3 Pin Number Function 1 Interlock 2 Interlock 2 Interlock 1 Int
43. g this bit the power supply ignores all other data contained in the set_reg and in the i set fields thus replying and giving information on its internal status reg i_set and i read Thanks to this feature the power unit can be controlled only with a single command thus reducing driver or EPICS IOC complexity and maximizing bandwidth Example Suppose that the LiAM power supply unit is turned on and it is regulating a 4 5000A output current on a 15Q resistive value The user then sends the following command FDB 50 01 2453 r FDB 6001 01 2453 4 04 5002 r After sending the FDB command the PS turns on it was already ON in this example and sets its current to 1 2453A reaching this setpoint with a ramp defined by the slew rate value stored in the power supply non volatile memory oa _ LiAM User s Manual Remote Control The entire reply from the power supply referred to the format just presented can be interpreted as follows 55 Module is ON Ramp is executing Ramp execution flag NO faults are present the rail at their high level handled automatically by the LiAM module internally Remote Control LiAM User s Manual 532 MOFF Command The MOFF r command is intended to turn off the LIAM power supply output thus disabling the output current terminals The MOFFV command automatically sets output current to OA zero with a SA s factory default slew rate
44. he actual output current set point before generating a fault condition Load Fault Threshold cell 39 this value V defines the maximum allowable voltage difference measured as the difference between the predicted voltage value and the actual value of the output voltage Interlock Enable Disable Mask cell 48 this cell contains and defines the 1 digit hexadecimal ASCII number that represents the binary mask for the individual setting of interlocks 1 and 2 see Interlocks Enabling Disabling for further information Interlock Activation State Mask cell 49 this cell contains and defines the l digit hexadecimal ASCII number that represents the binary mask for the individual setting of activation state of interlocks 1 and 2 see Interlocks Activation State for further information O LiAM Description LiAM User s Manual 3 3 Status Register Each LiAM module has an internal 16 bit status register that contains all useful information about the power supply operation this register is updated in real time and it is always accessible by the users via the remote connection The internal status register structure is presented in Table 5 bit 15 is the MSB and bit O the LSB Status bit Cell Caption 15 TURNING OFF 14 RAMP EXECUTION FLAG 3 5 12 RAIL STATUS 1 0 11 reserved 10 OVER VOLTAGE LOAD FAULT STATUS RAIL UNDERVOLTAGE REGULATION FAULT INTERLOCK 2 INTERLOCK 1 CROWBAR OVER TEMPERATURE AC FAUL
45. in the following form HMR V value r where e value is the output voltage readback V measured at the module output terminals The MRV command being a reading command returns a response in any module condition Examples MRV example when the module is OFF MRV r i MRV 0 00012 r MRV example when the module is ON and regulating output current MRV r MRV 28 34563 r Remote Control LiAM User s Manual 5 3 14 MRW Command The MRW r command returns the actual value of the estimated active power supplied to the connected load This estimation being computed as the product of the output voltage and the output current readback values has also an 18 bit resolution and it is presented with a 5 digit precision Replies from the power supply LiAM controller to this command are in the following form MRW value r where e value is the output active power readback W estimated as the product of output voltage and output current readbacks The MRW command being a reading command returns a response in any module condition Examples MRW example when the module is OFF MRW r MRW 0 00432 r MRW example when the module is ON and regulating output current MR WY MRW 207 32445 r a E LiAM User s Manual Remote Control 5 3 15 MSP Command The MSP r command returns the value of the power supply last stored set point current value Replies from the LiAM unit
46. ith the module ON MUP r NAKV En C LiAM User s Manual Remote Control 5 3 20 VER Command The VER r command returns information about the LIAM power supply model and the currently installed firmware versions The response to a VER r command is in the following format HVER LIAM6005 FW verv where e FW ver is the firmware version currently installed on the module Please remember to keep them up to date by checking for updates upgrades on the website www caenels com The VER command being a reading command returns a response in any module condition Examples VER example VER r VER LIAM6005 1 0 r O Remote Control LiAM User s Manual 5 3 22 MWG Command The MWG command lets users write a desired value item in a defined internal EEPROM cell The correct form format for this command is as follows MWG cell num cell content where e cell num is the EEPROM cell number e cell content 1s the ASCII content to be written to the EEPROM cell cell num The on board EEPROM memory used to store module information as calibration parameters identification thresholds and divided in two sections field and value has 512 cells so that cell num is limited between 0 and 511 writing operations containing cell values exceeding these limits obtain a non acknowledgment reply NAK r This value section of the EEPROM is used to store descriptive c
47. k Configuration Example MESS 34 eut Monitor ES 35 3 2 INTERNAL MEMORY MAPPING Se 36 SR TE S O CO IE 38 3 3 STARUS IR GISTEN ii 40 3 4 ADA PTE 42 3 5 AUTOMATIC oe EA an 43 LOCAL DISPLAY neee ene eene o nono soc oocossoc ee 46 4 1 BOOT UP PAGE AA eenen 46 4 2 le uie N eo EE EE sne 47 4 3 AUTOMATIC LOAD RECOGNITION PAGE naan eenen ees se ee ee ee ee ee ee 49 PEDDIE CONTE OL inaa 50 5 1 PRELIMINARY INFORMATION aan ees sees se ee ee ee ee ee ee ee ee ee ee ee ee ee 50 De PAST OP COMMANDS ensen sneerde OE EE EE OG EG Ee RE IE EDE neen 50 5 3 COMMANDS OVERVIEW osse oen ed ses Dee des buen ndi Gee ee n Ee 51 535931 FDE Command beeren en ee ie ee GE ee ende 53 5 3 2 MOEF Command eee ee ee ee ee ee ee ee ee ee ee ee ee ee 56 BES MON Commesse EE RE nnee 57 5 3 4 MRESET Command ES SS Se ee ee ee ee ee ee ee 58 S20 EEN EE NE RE OE OE EE EO 60 EA COMMON ER a st OE OE RE OE N 61 EE EE EE 61 IIo MRM COMO rE E E EE EE EE GE Ee 62 23 9 MRP GCommand N N N ne 63 5 3 10 MRN AAR OE Sioteskoadion dian tantisndacscusedatbedseaentnndewetace 64 5 3 11 MRR Command nn ee ee ee ee ee ee ee ee ee ee ee ee ee ee 65 3 12 MERE CO AE OE EE EE AE 66 5 3 13 MRV ENS OE OO EEE EENE EN 67 5 3 14 MRW Command AA c ccccccccssccsssccssccessccssccsscccssccescecssceeseees 68 5 3 15 MSP Command A 69 5 3 16 MSR Comma 70 5 3 17 MST Cas ese ees
48. lew rate in A s stored in the EEPROM cell 30 The LiAM module responds with acknowledgment command AK r if the value is correctly set and with a NAK r if e the set value is out of range the maximum settable current value is user defined and stored in EEPROM cell 4 e the module is OFF it is necessary to turn the module ON first e the module is performing a ramp it is necessary to wait for the power supply to end the previous ramp Examples MRM example with the LiAM module in OFF state MRM 2 872 r NAKV MRM example with the LiAM module ON and not ramping MRM 3 1234 r AK r Q LiAM User s Manual Remote Control 539 MRP Command The MRP r command returns the value of the positive power rail voltage i e positive DC Link Readback values have a unipolar 12 bit resolution Replies from the LiAM power supply unit to this command are in the following format MRP value r where e value is the measured DC Link voltage V Even if the internal ADC dedicated to this purpose has a 12 bit resolution this value is presented to the user only with a 100 mV resolution The MRP command being a reading command returns a response in any module condition Examples MRP example when the rail voltages are disabled MRP r MRP O OV MRP example when the positive rail is at mid level MRP r MRP 55 3V O Remote Control LiAM User s Manual 5 3 10 MRN Comm
49. ly i e FAK Now the value 3 88 is stored in the value cell number 4 which is the cell 0x4080 since the value section offset is equal to 0x4000 bytes and each cell length is Ox20 byte The Imax value not being password protected takes effect on the module operation but only after a MUP r command is sent to the LIAM 32 1 Value Section Cells Herein in order to correctly configure and check the power supply operation a brief description of the value section user definable cells is presented Imax cell 4 the value contained in this cell defines the maximum current A that a user can set to the LiAM module This value needs to be included between a lower limit OA and rated output current 0 1 A Max Temperature cell 20 this value C defines the temperature threshold above what the power supply generates an over temperature fault condition The temperature is directly measured on different points of the output stage and the highest value is taken into account Load Resistance cell 21 this value Q defines the estimated value calculated automatically from the power supply of the load resistive part 1e magnet cabling Please refer to the MTUNE r command for further details EE 0 LiAM User s Manual LiAM Description Serial Number cell 22 this cell contains the serial number of the power supply AC Phase Under Voltage Protection cell 2
50. mory and it is used into normal operation to perform diagnostics e g regulation fault routine and to operate the Adaptive Rail Switching In order to check if the estimated resistive value of the load has been correctly estimated the user needs to send to the power supply an MRR r command that returns the value of the last stored resistance Please note that in order to make the computed Rgsr value take effect in the module operation a MUP r command needs to be sent to the power supply unit Example I Consider now running the automatic load procedure by sending an MTUNE r command to the power supply connected to a magnet load The Resr value computed from this procedure is found to be 4 350 In normal operation the LiAM power supply automatically recognizes that the maximum required output voltage for this load is equal to Vourlmax Resp 5 21 75 V where SA is the maximum output current rating of the power supply The load connected to the LiAM unit would then never need the voltage rails to be at HIGH level and into normal operation then only the MID voltage configuration will be used thus drastically reducing the internal power dissipation of the module LiAM Description LiAM User s Manual The behavior of the unit output current output voltage and the voltage rails considering this example situation is shown in Figure 24 please note that a point by point 0 1 Hz current sine wave is fed to the power su
51. n has been completed If damage is detected file a claim with carrier immediately and notify CAEN ELS d o o service personnel via fax or via e mail message to info caenels com EE Safety and Installation LiAM User s Manual 2 3 Injury Precautions This section contains the fundamental safety rules for the installation and operation of the system in order to avoid injuries 2 3 1 Caution The following safety precautions must be observed during all phases of operation service and repair of this equipment Failure to comply with the safety precautions or warnings in this document violates safety standards of design manufacture and intended use of this equipment and may impair the built in protections within CAEN ELS d o o0 shall not be liable for user s failure to comply with these requirements To avoid electrical shock or fire hazard do not apply a voltage to a load that is outside the range specified for that load Do Not Operate Without Covers To avoid electric shock or fire hazard do not operate this product with covers or panels removed Do Not Operate in Wet Damp Conditions To avoid electrical shock do not operate this product in wet or damp conditions Do Not Operate in an Explosive Atmosphere To avoid injury or fire hazard do not operate this product in an explosive atmosphere Do Not Operate With Suspected Failures If you suspect there is damage to this product have it inspected by qualified
52. nal Memory Mapping Each LiAM power supply module has an on board EEPROM memory that stores all information about calibration parameters module identification thresholds interlock configuration etc Some of these fields can be user defined and are extremely useful in order to exactly fit the power supply to the specific application EEPROM memory size is 256Kbits and is divided into two main different sections each one consisting of 128Kbits One of these two sections is not used in the LiAM power supply series it is used in other power units by CAENels The only section used is the following e VALUE section This structure can be seen in Figure 23 Byte address VALUE 0x4000 0x4020 Ox41FF Figure 23 EEPROM memory structure The EEPROM cell size is 0x20 bytes 1 e 32 bytes and being the content stored in ASCII string format the total string can contain 31 bytes r termination character mandatory to correctly read and store the content Some EEPROM cells are password protected and can be unlocked using the PASSWORD command these cells are only accessible by experienced CAENels personnel The EEPROM value structure and the cell content description are presented in Table 4 O LiAM User s Manual Cell SAAN EA UM BA NY p jen 12 13 19 20 21 22 23 24 25 26 27 28 29 30 31 36 37 38 39 40 41 46 48 49 Cell Caption Co
53. ndication of the module operational status Remote connectivity to LIAM 6005 as for all other CAENels instrumentation is guaranteed by means of a standard RJ 45 Ethernet connection TCP IP that allows to easily control and monitor the functionalities of the power supply unit current setting output current reading and setting temperature monitoring etc The digital control solution with respect to external analog one gives the advantages of greatly improved noise immunity the analog voltage control signals that come from external DACs are subject to noise pick up and this effect is greatly amplified when needing very precise output currents or output voltages Easiness of control of large installations is also one of the big advantages of Ethernet connectivity since everything can be handled from the control system directly to the modules Maintenance issues are also easier and faster to carry out with the fact that the firmware for all the modules can be upgraded remotely Accuracy of the output current is also a great advantage of using digital interface the calibration of the output current is performed using a digital third order polynomial fit curve directly on the module itself so that external DACs drifts or non TO LiAM User s Manual Introduction linearity are avoided bypassed since they would not be included in the computation of the calibration curves This LIAM 6005 power unit rated at 300W output power is
54. negative output terminal as indicated on the label that can be found over the terminal connector where also output current and output voltage ratings are presented Suggested cable section for output is 1 5 mm 2 mm or 15 AWG 14 AWG WARNING Please be aware that the output voltage of the LiAM 6005 module can reach a maximum of 60V so that the screw terminals of these connections can be found at a high voltage with respect to EARTH potential O
55. nstalled on the rear side of the crate in order to avoid contact of the users with conductors at a dangerous potential The cablings of the three phase input conductors are shown hereafter Please be sure to execute all these operations with the AC mains unplugged from the power distribution network The AC mains cable needs to be fit inside the hole centering also a plastic cable tie that it is housed inside the plastic housing pass the cable tie inside the two small holes as shown in Figure 11 Figure 11 AC mains conductors and cable tie Now fix the three conductors and the PE cable to the screw terminals placed on the rear side of the crate as shown in Figure 12 Figure 12 AC mains conductors connected to the terminal blocks The plastic protection can now be fixed to the rear panel by screwing the four screws placed on the four corners of the housing Once connected it is necessary to 0 LiAM User s Manual Safety and Installation tie the cable tie in order to secure the connection of the main conductors to the casing as shown in Figure 13 Dane Figure 13 protection cover of AC mains in its final configuration Once everything is fixed you can cut the exceeding plastic part of the cable tie and then finally turn on the AC mains on the wall plug The suggested cable to be installed with this plastic protection cover is a 4 x 15 mm type An example of a typical installation cabine
56. ormed and the cause of the fault has been removed e DIAGNOSTICS LED the light it is serviced 1e toggled by the control electronics at every diagnostic routine execution If this LED is not toggling between on and off state the internal diagnostics is not correctly executed by the module e AC OK LED the light indicates that the AC mains input for the modules are correctly working e OUTPUT LED the blue light indicates that the LiAM module is in ON state and it is correctly regulating the output current It is important to notice that the blue OUTPUT light and the red FAULT light cannot be on at the same moment because the module cannot correctly regulate output current if a fault is experienced and the output stage of the power supply is turned off The RESET hole accessible by using a small screw driver allows performing a re initialization of the LIAM internal firmware 3 1 1 Internal Protections Each LiAM module is equipped with multiple internal protections hardware and software to avoid unwanted behaviors or eventual damages to the unit and also to let users run the power supply safely All hardware protections are installed into the LiAM power units and are here listed e CB CrowBar protection O LiAM Description LiAM User s Manual e Voltage rail fuses e Circuit breaker Several firmware protections some of them redundant are also implemented and here listed e Rails undervoltag
57. pply 50 40 30 20 10 40 Figure 24 voltage rails behavior for a low value resistive load where the BLUE line is the output current the RED one the output voltage and the GREEN ones the rail voltages values Example 2 Consider now running the automatic load procedure by sending an MTUNE r command to the power supply connected to a magnet load and that the Resr value computed from this procedure is found to be 11 230 In normal operation the LIAM power supply recognizes that the maximum required output voltage for this load is equal to Vourlmax Rgsr SA 56 15 V where 5A is the maximum output current rating for the power supply In this case the LIAM power unit automatically recognized the output voltage needs when setting a new current value and uses an hysteresis threshold in order not to have several voltage rail commutations The behavior of the unit output current output voltage and the voltage rails considering this example situation is shown in Figure 25 please note that a point by point 0 1 Hz current sine wave is fed to the power supply O LiAM Users Manual LiAM Description 100 line ist gt rail volt O Local Display LiAM User s Manual 4 Local Display This chapter provides a brief description on the LiAM front panel local display indications and different operation screens pages 4 1 Boot up Page During power up or reset of the LiAM power supply unit the mod
58. rol 5 3 17 MST Command The MST r command returns the value of the power supply internal status register 16 bit Replies from the LiAM power supply module to this command are in the following format MST value r where e value is the ASCII representation of the internal status register value composed by 4 hexadecimal digits and corresponding to the 16 bit wide status register The MST command being a reading command returns a response in any module condition Examples MST example with the module ON ramping and voltage rails at mid level MST MST 5001 r EE Remote Control LiAM User s Manual 5 3 18 MUP Command The MUP r Module UPdate command performs an update of the power supply LiAM actual parameters with the parameters read from the module internal EEPROM As an example the MWE command updates only the content of the selected EEPROM field but not the corresponding LiAM parameters In order to make the module update its parameters it is necessary to perform the MUP r command this was done not to apply wrong or undesired transmitted values on the fly without wanting it Replies from the power supply are in the form AK r or NAK r this non acknowledgment reply is generated when e the LiAM module is ON it is necessary to shut down the channel with MOFF command first Examples MUP example with the module OFF MUP r AK r MUP example w
59. rol LiAM User s Manual Ne Assign IP Address A Assignment Method would you like to specify the IP address or should the unit get its settings from a server out on the network Obtain an IP address automatically 1 S 2 Vd Assign a specific IP address MV x ha bi Qi Pr TCP IP Tutorial IP Settings Please fill in the IP address subnet and gateway to assign the device The subnet will be filled in automatically as you type but please verify it for accuracy Incorrect values in any of the below fields can make it impossible For your device to communicate and can cause network disruption IP address Subnet mask Default gateway Configuration information is not available For this device The subnet mask and default gateway will not be able to be set After the IP Address has been set successfully then return to this Assign IP Address wizard to set the subnet mask and default gateway e Click on the Assign button Ne Assign IP Address Assignment ETC TER hea Click the D to complete the IP address assignment v Wait for the assignment procedure to end and then click Finish The new module IP address should now be assigned and the success of the operation can be verified on the Devicelnstaller main window if the window does not refresh click on Search 82 LiAM User s Manual Technical Specifications 6 Technical Specifications
60. s Always disconnect wall AC plugs before making these connections Using a screwdriver on these screw terminal connection may cause a serious ELECTRICAL SHOCK refer to Figure 6 2 9 1 Installation and Cabling Procedure Connections to the LIAM power supply units must be carried out in the order herein presented Please read and follow these indications carefully EZG Safety and Installation LiAM User s Manual 1 connect the eround terminal of the input connector first 2 optional connect the interlock terminals to the load interlock signals and the output relay status if needed only connection of interlock 2 is shown in the picture eer Figure 8 sample connection of interlock 2 yellow positive white negative be 7 LiAM User s Manual Safety and Installation 3 connect the current output terminals to the magnet to be supplied Figure 9 output connections to load _ 4 EL out and connect the three phase line in uts to the ower supply ENSURE THAT THE CONNECTION TO THE WALL AC THREE PHASE MAINS IS NOT ACTIVE AND POWER CANNOT BE DRAWN Figure 10 connection of line phases Ll L2 and L3 unplug wall AC mains before executing this operation 21 Safety and Installation LiAM User s Manual 2 9 2 Protection Covers optional Plastic protections can be provided and can be i
61. ses are correctly into operation the module front LED should be as in Figure 20 O LiAM Description LiAM User s Manual Figure 20 AC OK front panel light indicator Please note that the loss of the phase dedicated to supply the control and auxiliary circuit will turn off module communication making the LIAM connectivity inaccessible 3 1 1 1 Over Temperature The output stage of the LiAM power supply is monitored by high gain and high precision temperature sensors in different places The module internal logic disables the output when the maximum temperature among these rises above a user defined threshold value and sets an Over temperature flag in the status register thus generating a FAULT condition that as in the other cases needs to be reset before enabling the output again The over temperature fault trips whenever the following condition is true max T T2 gt Try where T and T are the internal measured temperature values and Try the pre defined factory threshold chosen for correct and safe operation 3 1 11 Output Over Voltage The output voltage of the LiAM power unit is protected from over voltages by an internal routine that continuously monitors the voltage readback values and turns the power supply off by ramping its current to OA with a pre defined slew rate of 5A s whenever the following condition applies Vour gt 65V vn 0 1 2 3 1 e the output voltage value is over the defined thre
62. shold rated output voltage 5V for four consecutive sampling periods 3 1 1 1 Regulation Fault The module internal logic continuously monitors the actual output current readback with the last stored setpoint If this absolute difference is larger than a pre defined threshold the power supply generates a fault condition that turns the output off since the internal regulation could reach the correct setpoint value O LiAM User s Manual LiAM Description Considering Jour as the output current readback value Isgr as the last stored setpoint and Iry as the pre defined threshold the regulation fault trips if the following condition is verified User lour gt Iru This situation could occur if for example a 4A current setpoint is fed to a LiAM power unit that has a 30 Q resistive load connected to it Since the output voltage i e 120V is beyond rated output voltage the LiAM unit generates a regulation fault condition This fault flag should be reset before turning the output on again Most common operating conditions that may generate the tripping of this fault are hereafter listed instability of the output current control loop acurrent leakage to earth ground due to an improper connection of the load excessive value of the connected resistive load 3 1 1 1 Load Fault The load fault protection monitors that the resistive value of the load remains within a defined value interval This protection is very use
63. t allows reading and setting is the MSR command which reads or sets the user defined slew rate for the power supply see MSR Command section for further details 5 3 Commands Overview is received Replies could have different behaviors 51 The power supply controller replies every time that a termination character r O Remote Control LiAM User s Manual e an acknowledgment AK r string is sent back in case of a correct setting command e a non acknowledgment NAK r string is sent back in case of a wrong unrecognized command or if the system is in local operation mode and a write command is sent to the controller write commands are marked with a W in Table 6 e a standard reply preceded by a and followed by a r character is sent back as a response to a reading command A brief description for each command in alphabetical order is herein presented with some example annotations the correct interpretation for these examples is as follows Command sent TO the power supply Reply FROM the power supply LiAM User s Manual Remote Control 5 3 1 FDB Command The FDB command is a custom command that was especially implemented as in all series of power supplies made by CAENels in order to minimize traffic on the Ethernet 10 100 communication socket having a dedicated request reply structure The feedback command syntax is as follows FDB set_reg 1_set r
64. t combined with a 1U 24 port Ethernet switch on top first slot is herein shown in Figure 14 Figure 14 19 cabinet containing sixteen LIAM modules O Safety and Installation LiAM User s Manual 2 10 Suggested cable sections The suggested cable sections for the LiAM rear panel connections are all included in the range 0 2 mm 4 mm ie 24 AWG 11 AWG and presented in Table 1 Table 1 suggested conductor sections Please remember connect the power supply to the EARTH ground connection first 2 11 Voltage Rail Fuses The voltages used for generating the power rails on the LiAM output stage are protected with two fuses one for each rail placed on the rear panel The current rating of both these fuses is _8A T standard 5 x 20 mm dimension and they are used to protect the output stages and circuitry from fault conditions Figure 15 fuse holder A simple screw driver is needed in order to remove fuse holders and to replace these fuses as shown in Figure 15 OTE LiAM User s Manual Safety and Installation Figure 16 substitution of voltage rail fuses Please remove the blown fuses in the corresponding fuse holder and replace them with new ones with the same current rating and characteristics as shown in Figure 16 Please refer to the Liam 6005 Distribution Unit Installation Guide for installation of the 6U 16 channel distribution unit O LiAM Description LiAM User s
65. ule model and the installed firmware version are displayed as shown in the following picture Figure 26 CHENE ls LIAM 6945 Figure 26 Boot up display screen The internal firmware version check can be also performed remotely by using the VER command please see the Remote Control section for further information LiAM User s Manual Local Display 4 2 Monitor Page Three 3 seconds after power up or reset of the unit the boot up screen page disappears to visualize the monitor page of the LiAM 6005 The display is divided into for lines and the following data information are shown and updated every second power supply or magnet identification i e ID output current readout value A with a 100uA resolution output voltage readout value V with a 1004 V resolution the power supply status A sample oi the monitor page of a LIAM power unit when the module output is off is shown in Figure 27 Figure 27 Readout display screen when module is OFF The unit identification name identifies the specific power supply or the magnet it is connected to This ID is user defined and can be stored in the module internal memory on cell 27 please read the memory mapping section for further information on this The identification string is shown in the module first row and the same value can be read remotely from EEPROM cell 27 or by using the MRID command check the remote communication section for further det
66. where ad e set reg is the setting register of the power supply 8 bit wide ei set is the desired output current setpoint value A The power supply reply after a FDB command is in the following format FDB status reg set read where e status reg is the 16 bit wide status register of the PS formatted in an hexadecimal string this status string has a fixed length of 4 byte ei set is the string containing the output current desired setpoint value string length is 8 bytes i e 8 characters sign 2 integers 4 decimal digits eg 1 02A it is returned as 01 0200 ei read is the output current readback string its length is equal to 8 bytes sign un 2 integers 4 decimal digits The status_reg structure is presented in the following table and in section 3 3 Status Register Structure 16 bit Bit 15 TURNING OFF Bit 14 RAMP EXECUTION FLAG Bit 13 12 RAIL STATUS 1 0 Bit 11 reserved Bit 10 OVER VOLTAGE Bit 9 LOAD FAULT STATUS Bit 8 RAIL UNDERVOLTAGE Bit 7 REGULATION FAULT Bit 6 INTERLOCK 2 Bit 5 INTERLOCK 1 O Un LY Remote Control LiAM User s Manual CROWBAR OVER TEMPERATURE The set reg structure in order to set the desired behaviour must be interpreted as follows EN rass CONNAND RAMP The BYPASS COMMAND bit bit 7 i e MSB was especially implemented in order to use the FDB command also as a simple read command by settin
67. xamples MRR example when the rail voltages are disabled MRR r MRR 2 4435 r Remote Control LiAM User s Manual 5 3 12 MRT Command The MRT r command returns the value of the maximum temperature directly measured on the power output stage heatsink The LiAM has two different temperature sensors and the maximum value between these two is considered Even if the internal ADCs have a 12 bit resolution this value is presented to the user with a 0 1 C 0 1 K resolution Replies from the LiAM power supply unit to this command are in the following form MRT value r where e value is the temperature value C Celsius measured on the output stage heatsink It is also possible to read the single temperature values by sending the commands MRTI r and MRT2 r to the unit The MRT command being a reading command returns a response in any module condition Examples MRT example MRT MRT 37 2 r MRTI and MRT2 example MRT Iv MRT 31 3 r MRT2 r i MRT 37 2 r ES LiAM User s Manual Remote Control 5 3 13 MRV Command The MRV r command returns the readback value of the power supply actual output voltage measured at the LiAM module output terminals As for the output current voltage readback values have an 18 bit resolution 17 bit sign and they are presented with a 5 digit precision Replies from the power supply LiAM controller to this command are

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