FAST-PS - User`s Manual
Contents
1. Software Commands FAST PS User s Manual LOOP r gt lt LOOP V r n 52 FAST PS User s Manual Software Commands 3 5 9 MWI Command The MWI command can be used to set the output current value when the module is in the constant current mode see LOOP Command This command is usually needed when running feedback related application and for small changes in the output current The use of this command is alternative to the MWIR Command ramping current command which is advised for regular use This command has the following format MWI current_setpoint r n where current_setpoint is the desired current set point expressed in Ampere A Replies from the FAST PS to a MWI set are in the form A K r n when the command is correctly executed or NAK xx r n when the command cannot be executed 11 is the error code To read last applied current setpoint the query command MWI has to be used The response to this query command is in the following format MWI current_setpoint r n where MWI is the echo string current setpoint is the last applied current setpoint expressed in Ampere A Examples MWI set example with current setpoint 1 52 A AK r n MWI set example when the module is OFF NAK 13 r n MWI query example MWI r e MWI 1 52 r n OQ Software Commands FAST PS User s Manual 3 5 10 MWV Comman2. 4 All Rights Reserved CAEN ELS doo Rev 1 0 November 2015 FAST PS User s Manual This product is marked el CAEN ELS d o o Kra ka ulica 2 6210 Se ana Slovenija Mail info caenels com Web www caenels com FAST PS User s Manual Table Of Contents 1 eh sd A Oa TIIN me ma nene e re ra vee ee ego ee 9 1 1 Ee 9 12 FAS EPS ATACAN SI ER tis goastubainn ear ometa sise in snio 10 1 3 NMIODES OF IERT E 12 lad Reeunanion ModE isao eno aii a aceasta 12 Lo HCO MO E E 12 don EE 13 1 4 INSTALLATION ag aaa aa nana aaa vanno kaaa ao 13 1 5 CONNECTORS e a 15 1 5 1 Remote Sens in gpp 17 1 6 OA ON SE 18 1 6 1 Anal gj SSA 18 1 6 1 ee map RR 19 JOE 21 1 7 EXTERNAL Lg RE TEE 21 1 7 1 Interlock Enable Disable Mask Rss 22 1 7 2 Interlock Activation Level Mask Reese 22 EE Intervention Time ES 23 El ock Iden ee WEEN 23 1 8 ee AL PROTEINE KA DA 23 0 Leakage Current EE i gt me 24 AT ee 24 JETT TEEN fn Coe 24 RG eat OVerCuyentego nese 25 RSSDE ay Power O Vanna 25 FRI BAr I i 26 Bpeeemenperature OVT et _ 26 Ee er ueltei ge nenn EE 26 1 9 WAVEFORM S E E ELA I 1 10S EE 28 LOCA FRONT RO enee kene 29 ZA NAVIGATION 29 22 DISPLAY EE ek 20 2 2 1 Power up EE RER 30 2 2 2 Home Screen ARIE cc nccccsccscccscccsccesccesccsscesscesceeeseess 31 2 2 3 Menu Page ee 33 BM
3. Figure 15 Home Screen The Home screen presents some indications on the right side as e ON OFF shows if the power supply output is enabled or not e REM LOC FCI shows if the module is in Local Remote or Fast Control Interface control mode e C C C V shows if the module is working in C C or in C V regulation mode An example of the indications on the right side of the Home screen is hereafter shown in Figure 16 Figure 16 Home Screen indicators FAST PS User s Manual If the module has experienced one or more faults e g interlock intervention over temperature etc the home page screen would display a list the faults turning also the module OFF The power supply latches on every fault recognized by the internal logic so that every type of fault is recorded this means that the first fault happening does not ban the other ones to be recorded so that giving users more information permits a better investigation of the fault cause z OCL FAST PS User s Manual 2 2 3 Menu Page The Menu page is reachable by performing any action on the navigation switch when in the Home Screen The Menu Page gives access to all the local features of the FAST PS power supply unit There are five different options that can be selected as shown in Figure 17 AST PS Figure 17 Menu Page The accessible sub pages and or actions from this page are hereafter listed note that the selected s
4. 3 5 3 VER Command The VER command returns the information regarding the FAST PS model and the current installed firmware version The response to the VER command is in the following format VER ps_model fw_version r n where VER is the echo string ps model is the FAST PS model and fw version is the current firmware version The echo model and firmware information are separated by character and the string is terminated with the standard z character sequence Example VER command example VERE LEVER FAST PS 2020 400 0 9 01 r n FAST PS User s Manual Software Commands 3 5 4 MST Command The MST command returns the value of the FAST PS power supply internal status The response to the MST command is in the following format MST status_reg r n where MST is the echo string and status_reg is the hexadecimal representation of the internal status register The internal status register has 32 bits and so its representation is composed by 8 hexadecimal values For additional information regarding the status register please refer to the Status Register structure The MST command being a reading command returns a response in any module condition Example MST command example the status register indicates that the module is in fault MST r gt i MST 00000020 r n Software Commands FAST PS User s Manual 3 5 5 MRESET Command The MRESET command has to be u
5. is the output voltage value Example MRV MRV 50 FAST PS User s Manual Software Commands 3 5 8 LOOP Command The LOOP command can be used in order to select the mode of loop control of the FAST PS unit There are two possible mode of operation e Constant Current c c e Constant Voltage c v To set the mode of operation the following commands has to be used LOOP mode r n where mode is a single char indicating the mode of operation e T for Constant Current c c mode and e YV for Constant Voltage c c mode Replies from the FAST PS to a LOOP set are in the form AK r n when the command is correctly executed or NAK xx r n when the command cannot be executed rr is the error code The two mode of operation can be changed only when the module is turned OFF To read the current used loop mode of operation the query command LOOP has to be used The response to the LOOP query command is in the following format LOOP mode r n where LOOP is the echo string mode is a single character indicating the loop mode for constant current mode and V for constant voltage mode Examples LOOP set example to set the constant current mode LOOP i AK r n LOOP set example when the module is ON LOOP Vu i NAK 09 r n LOOP query example when the module is in constant voltage c v mode
6. Commands are NOT case sensitive and therefore the command string can be sent either using uppercase or lowercase characters conversion to uppercase characters is performed internally Each command must be terminated with the termination sequence The FAST PS supports two termination sequences e carriage return termination char Ww Ox0D in hexadecimal notation or commonly CR or e carriage return line feed sequence r n OxOD Ox0A in hexadecimal notation or commonly CRLF Command Example MWI 20 5580W or MWI 20 5580 r n e MWI is the command field e isthe parameter s separation character e 20 5580 is the first parameter field e r or r n are the termination sequences of the command In the following command description the r termination char is used but it can be always replaced with the termination sequence r n Commands are processed one at a time therefore user must wait for a response from the unit before sending the next command BT Software Commands FAST PS User s Manual All the responses from the FAST PS module are in upper case and are terminated with the same carriage return line feed sequence r n OxOD Ox0A in hexadecimal notation or commonly CRLF MWI 10 5875 r n i ACK r n Or MWI 10 5875 r i ACK r n 3 2 Command Replies The reply from the module depends on the given command In gen
7. FAST PS 1020 200 10 A 20 V 200 W FAST PS 1040 400 10 A 40 V 400 W FAST PS 2020 400 20 A 20 V 400 W FAST PS 2040 600 20 A 40 V 600 W FAST PS 3020 600 30 A 20 V 600 W Table 1 FAST PS models The FAST PS module is compact and fits in a single 19 inch 1U standard crate The power unit implements a completely digital control loop with a Pulse Width Modulation PWM generation technique that allows to adapt the system to any load condition The control board houses a dedicated FPGA with integrated dual core ARM CPU The loop regulation task is performed directly by the FPGA logic in order to have high performance and deterministic loop control On the ARM CPU it 1s _ 7 FAST PS User s Manual installed an embedded Linux OS that supervises all process as communication diagnostics and local interface handling Remote communication is guaranteed by means of an Ethernet 10 100 1000 autosensing socket present on the front panel of the power unit The power supply can be also monitored and controlled via a navigation switch and a graphic high resolution color display featuring user friendly menus In addition to the standard Ethernet interface it is possible to communicate with the unit using the SFP ports on the front panel This interfaces allows to communicate with the unit using a proprietary packet structure with a very high update rate more than 10 kHz These ports are connected directly to the FPGA logic and so the
8. Parameter 2 Detailed description Return the module model and installed firmware versions Turn on the module Turn the module OFF Set the power module loop mode Query for the power supply loop mode Read output current value Read output voltage value Set the new current setpoint ASCII Query for the last applied current setpoint Set the new current setpoint ASCII Query for the last applied setpoint Go to the given setpoint with a ramp ASCII Query for the last accepted final ramp setpoint Go to the given setpoint with a ramp ASCII Query for the last accepted final ramp setpoint Set the I ramp slew rate A s ASCII Query for the I ramp slew rate Set the I ramp slew rate V s ASCII Query for the I ramp slew rate FAST PS User s Manual Reply value ASCII indicating the module model and firmware version AK Or NAK AK AK or NAK Loop mode T or V ASCII indicating the output read current ASCII indicating the output read voltage AK or NAK ASCII indicating the current setpoint AK or NAK ASCII indicating the voltage setpoint SNAK or NAK ASCII indicating the current setpoint AK Or NAK ASCII indicating the voltage setpoint SAK a or NAK ASCII indicating the I ramp slew rate AK or NAK ASCII indicating the I ramp slew rate FAST PS User s Manual Software Commands Read
9. the Crow Bar is fixed for every model and the intervention thresholds are different based on the FAST PS maximum voltage rating 1 8 7 QVerTemperature OVT Internal monitoring of temperature is performed in different places inside the FAST PS power supply If a pre defined threshold is exceeded by any of these internal sensors an OVT condition is generated thus shutting off the power unit The threshold value C can be set by experienced users A reset fault operation needs to be executed on the status register of the FAST PS before turning the output off again 1 8 8 DC Lmk Undervoltag The FAST PS is composed internally by a power AC DC section cascaded with a DC DC stage The voltage generated by the AC DC section 1s also called DC Link and it is proportional to the maximum rated voltage for the specific model Usually the DC Link voltage is about 20 higher than the rated output of the FAST PS A continuous monitoring of the DC Link voltage is performed in order to always guarantee the capability of obtaining the maximum voltage from the power supply If the DC Link drops below a certain threshold the power supply unit could not be able to regulate correctly or some faulty conditions have arisen so that a fault conditions is generated It is necessary to reset the status register and to get rid of the fault cause before turning the power supply back on again ERC ER FAST PS User s Manual 1 9 Waveform The FAS
10. FASTPSTRINXA Trigger Input on BNC connector optional A brief description of the two options is presented hereafter 1 6 1 Analog Control Input An input that allows the FAST PS to be controlled as an amplifier is provided on the rear panel on a BNC connector on the A socket This input is labelled as AN CTRL This input accepts signals ranging from 10V to 10V and generates an output which is proportional to the input signal meaning a Full Scale for a 10V input 0 for a OV input and Full Scale for a 10V input An example of the relation between the GC HR FAST PS User s Manual analog input signal and the output can be either current or voltage depending on the Regulation mode is shown in Figure 10 Analog Control 100 100 AN CTRL OUTPUT Figure 10 AN CTRL vs OUTPUT dependance 1 6 1 Trigger Input An input that allows the FAST PS to be triggered is provided on the rear panel on a BNC connector on the B socket This input is labelled as TRG IN This input accepts TTL SV and LVTTL 3 3V compatible signals and should be driven by a low impedance source or generator The logic levels are subject to a hysteresis that allows for this recognized values that guarantee correct operation of the trigger as listed in Table 3 Logic Level Value Low to HIGH gt ZN High to LOW lt 0 7 V Table 3 Trigger Logic Levels FAST PS User s Manual The absolute maximum r
11. NE COTO vr i e one 34 DD CO PIO sao o o si esa da osle J 2 A RE 36 a a 37 3 1 COMMAND e KN EE 37 3 2 CONMAND REPE S doga a a dea a ne 38 3 3 ERROR DN 5 ez ae a a oo 40 3 4 COMMAND PR a do ae toala os 41 Ja BASIC COMMAND aag ee ae ea 44 FAST PS User s Manual 334 MON COPA e m mv m pe e a 44 Joa MOFT COMORES EEEE EEEa 45 fo Pe Pes VE COM EE 46 3 94 MST COG m vr e ere 4 J39 IVES ETC O10 Me nr e even 48 336 MRI COMMON no pe eo mer 49 33 7 MRV COPA e e E EE E R 50 3 5 8 LOOP COMORES nom m e ea ae 31 SD MWI CO se ee ae edo ea wean one scala es dodan 53 3940 IVY Command pe m een 54 K SES MWIR Command ET E 55 3 5 12 MSR Command s ccccccssccssccssccscccscccscccsccsscesscesscesceess 57 3 5 13 MWVR Command ANNER 58 3 5 14 MSRV Come aa 60 3 5 15 MRT Co 6 3 5 16 AT EEN esse 62 3 5 17 e WEE 63 RM GUUS ODA TUONO Sno sE 64 3 6 CONFIGURATION COMMANDS see 65 OT M 67 AC TTT et j if 68 WRI WORD Command RE 69 EEN VE COMME nn 71 MECHANICAL DIMENSTONG cccccsccsccccesccscccsscccscccvsccesccccccccccccccccssossces 72 TA L SPECIFICATIONS 2 ccccccsccccccccccccccccccccc M 73 FAST PS User s Manual Document Revisions Date Comment October 7 2015 Draft Release 3 November 26 2015 First Public Release FAST PS User s Manual Safety information Warnings CAEN ELS will repair or replace any product within the guarantee period if the Guarantor declares that
12. current or constant voltage mode the when enabling the output Replies from the FAST PS to a MON command are in the form AK r n when the command is correctly executed or NAK xx r n when the command cannot be executed with xx indicating the error code The complete list of the error codes is shown in the Error Table Sending an MON command when the module output is already enabled generates a non acknowledgment response Examples MON command example MON AK r n MON command example when the module is already enabled 09 code MON gt gt NAK 09 r n TS FAST PS User s Manual Software Commands 3 5 2 MOFF Command The MOFF Module OFF command is intended to turn OFF the FAST PS output driver thus disabling the output terminals The MOFF command automatically sets output current to OA or OV with a ramp before disabling the output drivers This is done in order to ovoid output overshoots especially in constant current regulation mode The slew rate of the ramp is factory defined Replies from the FAST PS to a MON command are in the form AK r n when the command is correctly executed or NAK wx n when the command cannot be executed with 2 indicating the error code Examples MOFF command example MORE gt i AK r n MOFF command example when the module is in local mode MO gt NAK Mu Software Commands FAST PS User s Manual
13. n or MRG 90 r SJEAN LUU MRG 90 0x2 r n e the read commanc e the echo stri ailed information about the single command pl Na CY Software Commands FAST PS User s Manual 3 3 Error Table The list of error codes returned with the NAK reply and their description are hereafter shown Error Code Description 01 Unknown command 02 Unknown Parameter 03 Index out of range 04 05 06 Power supply already ON Setpoint 1s out of software limits Module is OFF 09 11 2 Setpoint is not a number 13 15 Device is set in local mode Module 1s not in waveform 17 Module is in waveform mode 19 Module is already in the selected loop mode slected loop mode 99 Unknown error Table 8 NAK Error code table l 40 FAST PS User s Manual Software Commands 3 4 Command Table The list of commands used by the FAST PS and the corresponding syntax is hereafter presented as well as a description of each command purpose and any special requirements related to the specific command The base commands are summarized in the following table Software Commands Command 42 VER MON MOFF LOOP MRI MRV MWI MWV MWIR MWVR MSRI MSRV Read Write R A AH FE FE RE FE A Parameter 1 gd bk or Vie EST I Setpoint a V Setpoint SE I Setpoint ee V Setpoint gek at I Ramp Slew rate WE I Ramp Slew rate EE
14. power supply output back on again 1 8 5 OVerPower OVP The FAST PS can work continuously at a 5 over its power rating as expressed in the specifications The module is able to work at a power comprised between 5 and 10 over its rating 1 e between 105 and 110 for a 20 second period before turning off on an Over power fault If the actual output power drawn from the power supply is more than 10 above its nominal ratings the power unit will shut down after 1 second This behaviour summarized in the following Table 6 an example of a FAST PS 2020 400 unit is also listed Output Power Time of Operation lt 105 of Py Continuous e g FAST PS 2020 400 lt 420W lt 110 of Py 20 s e g FAST PS 2020 400 lt 440W gt 110 of Py 1s e g FAST PS 2020 400 gt 440W Table 6 FAST PS Output Power where Py is the rated nominal output power of the power supply unit as indicated in the technical specifications OT FAST PS User s Manual 1 8 6 Crow Bar The energy stored in reactive loads e g inductors needs to be dissipated in order to protect the power supply from damages when for example the output stage gets suddenly disconnected A hardware circuit with some voltage suppressors triggering TRIACs is present on each FAST PS model with different triggering thresholds This circuit allows protecting the unit from unwanted and dangerous over voltage conditions Being a hardware protection
15. 01 0x1 High 1 Low 0 10 0x2 High 1 High 1 11 0x3 Table 5 Activation Level Mask Parameter CSC FAST PS User s Manual Example if interlock 1 needs to have a high activation level trip when the interlock input signal is shorted the following command has to be se sent to the power unit MWG 91 0x1 r This setting has no effect it the interlock is not enabled 1 7 3 Interlock Intervention Time The module allows to set also the interlock intervention time how long an interlock signal need to be at its activation level before tripping and thus generating a fault condition The Intervention time parameters are stored in the field 92 for Interlock 1 and in field 94 for interlock 2 The value to be set is in ASCII format representing the intervention time in milliseconds The minimum settable value is 0 immediate generating of fault condition and the maximum value is 10 000 ms corresponding to 10 seconds Example if interlock 1 needs to have an interlock intervention time of 750 ms the following command has to be se sent to the power unit MWG 92 750 r This setting has no effect if the interlock is disabled 1 7 4 Interlock Identification Name The FAST PS also allows associating a name to the interlocks in order to read form the remote interface or to display on the local display the interlock condition name The Intervention names are stored in the field 93 for Interlock 1 and in field 95 for interlo
16. AST PS User s Manual MWIR query example MWIR r MWIR 10 5 r n 56 FAST PS User s Manual Software Commands 3 5 12 MSRI Command The MSRI command can be used to dynamically change the value of the current ramp slew rate The default slew rate used at start up of the unit is the value stored in the parameters table This command has the following format MSRI slew_rate r n where slew_rate is slew rate for the current ramp expressed in Ampere per second A s Replies from the FAST PS to a MSRI set are in the form A K r n when the command is correctly executed or NAK xx r n when the command cannot be executed xx is the error code To read the current used slew rate for the current ramp the query command MSRI has to be used The response to this query command is in the following format MSRI slew_rate r n where MSRI is the echo string and slew_rate is the slew rate value used for the current ramp expressed in Ampere per second A s Examples MSRI example to set the current slew rate to 10 A s MSRI 10 r i AK r n MSRI set example when the FAST PS is in local mode MSRI 10 r p NAK 15 r n MSRI query example MSRI r y e MSRI 10 r n Software Commands FAST PS User s Manual 3 5 13 MWVR Command The MWVR command can be used to perform a ramp to the given voltage setpoint This command can be used w
17. Command Write Parameter 1 Parameter 2 Detailed description Reply value MRT R Read MOSFET Heatsink Temperature C ASCII indicating the temperature value MRW R ASCII indicating the active output power value MGC R Read leakage current value A ASCII indicating the Leakage voltage value MRID R Read module on odule identification ASCII MST R Read module internal status register Internal status register Hex representation LJ MRESET W Reset the module status register AK or NAR PASSWORD W Password word J Set the password word ASCII m AK or NAK R o Query for the actual user privileges User privileges ASCII representation MRG R Parameter fi Read the given parameter field Field content ASCII MWG W Parameter field Co conten Write to the given parameter field AK or NAK ASCII AK or NAK 43 Software Commands FAST PS User s Manual 3 5 Basic Commands In the following section are described the basic commands that allows to control the FAST PS unit and to monitor its status 3 5 1 MON Command The MON Module ON command is intended to turn ON the FAST PS output driver thus enabling the output current terminals and allowing the power supply to regulate and feed current or voltage to the connected load After the reception of an MON command the power supply automatically sets output current to OA or OV depending if the module is set in constant
18. FACE control this interface allows controlling the unit via a proprietary protocol over the SFP SFP interfaces optical or electrical and it is meant to be used for very fast applications Update rates of more than 10 kHz are reachable using this communication channel z OCL FAST PS User s Manual 1 3 3 Update Mode The current or voltage setting of the unit can also be performed in four different modes e NORMAL the update of the set point current or voltage depending on the operation mode is performed as soon as a new set point is received via the remote local or fast interfaces e WAVEFORM the update of the set point is performed on a specific timing defined as a waveform attribute more information on the Waveform section and it is done internally e TRIGGER the set point is updated by an external event 1 e a hardware trigger coming from the rear BNC connector Please note that this mode of operation is obtainable only on the units that have the external trigger input connector installed ordering option factory configurable e ANALOG INPUT the unit is controlled by an external signal that is fed to the rear BNC connector The unit acts as a C C or C V generator depending on the pre set Regulation Mode This option is only available in units that have been factory configured ordering option Please note that the last two Update Modes of operation are available only in models that have been fact
19. T PS is able to act as a waveform generator both in current and in voltage regulation modes The waveform is stored internally into the power supply in a point by point manner and it gives a lot of flexibility since the maximum number of points of the waveform can be defined as well as the sampling period of the waveform execution The minimum time interval for the waveform execution period is rated at 0 1 ms 100 us giving an equivalent output waveform update rate of 10 kHz In order to correctly execute the output waveform it is necessary to tune the PID regulator parameters of the power supply to the specific load and have an adequate load atthe output More information on the waveform feature can be found in the corresponding command section 1 28 FAST PS User s Manual 10 Status Register The following table shows the FAST PS internal status register structure Bit Bit name Description 31 reserved 30 reserved 29 OVP Over Power condition 28 reserved 27 Ext Interlock 2 External interlock 2 has tripped 26 Ext Interlock 1 External interlock 1 has tripped 25 Excessive Ripple Module is having excessive ripple 24 Regulation Fault Modules has experienced a regulation fault 23 Earth Fuse Earth fuse is blown 22 Earth Leakage Earth current leakage fault 21 DC Link Fault DC Link under voltage condition 20 OVT Over Temperature condition 19 reserved 18 Crowbar Crowbar protection intervention 17 In
20. ables when using the remote sensing feature in order minimize possible noise pick up The FAST PS is shipped with a mating connector for the remote sensing that short circuits the S and pins and the S and pins respectively This configuration performs the remote sensing directly at the output connector of the power unit Leaving S and S pins disconnected will make the power supply sense the output voltage directly at the output terminal connections When using the remote sensing feature leave pins 2 and 3 disconnected In order to perform remote sensing at different points e g the load terminals it would be necessary to connect Pin 1 and Pin 4 as in Figure 7 FAST PS Power Cables Output Connector Sensing Cables Figure 7 Example of Remote Sensing FAST PS User s Manual 1 6 Options The FAST PS can be configured with options that are factory configured and can be found on the rear panel in places of connectors A and B The standard version of the FAST PS on the rear panel is as shown in the following Figure 8 and Figure 9 FAST PS 2020 400 Serial N 51A2020X002 gt FAST PS 1040 400 Serial N 51A1040X001 Figure 8 no options installed Figure 9 A and B options installed Options A and B are related to the following ordering codes to be added at the time of the order Ordering Code Description FASTPSACINXA Analog Control Input 10V on BNC connector optional
21. alue of the max leakage current that tripped the fault To return to the normal behavior of the read command the module status has to be reset see MRESET Command The MGC command being a reading command returns a response in any module condition Example MGC command example for a 60mA ground leakage current MGC i MGC 0 06 r n Software Commands FAST PS User s Manual 3 5 18 MRID Command The MRID command returns the FAST PS identification name string This description is useful in case that there are numerous units installed and it is possible to give a description for each unit for example the name of the load on which the unit 1s connected This information is also displayed on the local display The response to the MRID command 1s in the following format MRID fast_pszidentification r n where MRID is the echo string and fast_ps_identification is the module identification string The identification string is stored in the parameters table and so it is possible to change it using the Configuration Commands Example MRID example with the module identification SkewMag1 3 MRID _HMRID SKEWMAGL 3 r n EF CR FAST PS User s Manual Software Commands 3 6 Configuration Commands In the following section are described the software commands that allow to read set and store the working parameters of the FAST PS unit The MRG Command and MWG Command allow to read or modify the w
22. an be configured as mode of operation as described hereafter Oooo FAST PS User s Manual 1 7 1 Interlock Enable Disable Mask The FAST PS series external interlock can be enabled or disabled by writing to the corresponding Interlock Enable Disable Mask field of the advanced configuration parameters field 90 using the MWG command The value to be written is in ASCII format representing the corresponding bit mask as shown in the following table Interlock 2 Interlock 4 Bit Mask ASCII string Disabled 0 Disabled 0 00 0x0 Disabled 0 Enabled 1 01 Ox1 Enabled 1 Disabled 0 10 0x2 Enabled 1 Enabled 1 11 0x3 Table 4 Enable Disable Mask Parameter Example if only interlock 2 needs to be enabled the following command has to be se sent to the power supply after having un locked the password protection MWG 90 0x2 r 1 7 2 Interlock Activation Level Mask Each external interlock can be chosen to trip at high or low logic level The high level means that the interlock trips when the interlock input signal is shorted otherwise the low level that the interlock trips when the input is open To configure the interlock state mask it is necessary to write on the advanced configuration parameters field 91 The value to be written is an ASCII format representing the corresponding bit mask as shown in the following table Interlock 2 Interlock 1 Bit Mask ASCII string Low 0 Low 0 00 0x0 Low 0 High 1
23. and negative polarity of the terminal respectively The FAST PS module has two configurable dry contact input interlocks and output status signals that are directly available on the D Sub 15 Pin Female connector on the rear panel Figure 5 A mating connector a standard D Sub 15 Pin Male type can be installed in order to use access these available signals Pin 8 Pin 15 Figure 5 I O Connector The pin index of the D Sub 15 rear connector is summarized in the following table Ooo FAST PS User s Manual Pin Number Signal name 1 4 DNC 5 Magnetic Relay Common Contact C TAP 6 Magnetic Relay Normally Closed Contact NC TAP 7 Interlock 2 input HS Interlock 1 return 9 12 DNC 13 Magnetic Relay Normally Open Contact NO TAP 14 Interlock 2 return 15 Interlock 1 input Table 2 D sub 15 Pin pinout DNC DO NOT CONNECT The magnetic relay provides the output status of the power module when the module is ON the Normally Closed contact NC TAP switch opens and vice versa The absolute maximum current that can be sunk by the output status magnetic relays pins 5 6 and 13 is 200 mA The interlock pins are galvanically isolated from ground and outputs terminal nevertheless the absolute maximum voltage referred to ground that pins can sustain is 48V The two interlocks inputs have their own return connection The interlock is hardware activated when the input pin and its corresponding return pi
24. ating for the Trigger Input signal is of 5 5 V a higher voltage level applied to this input can seriously damage the device A visual representation of the voltage levels for the trigger operation 1s presented in the following Figure 11 Trigger Input ABSOLUTE MAXIMUM Figure 11 Trigger Thresholds 20 FAST PS User s Manual 1 6 2 Front Panel Indicators The FAST PS has four 4 front panel LED indicators as shown in the following Figure 12 SFP1 SFP2 i 1 CAENels Geer For Science Figure 12 front panel indicators The front panel indicators and their behaviour are hereafter listed clockwise starting from top left e C C Constant Current mode blue If turned on the FAST PS is working in constant current mode When off it is regulating the ouput voltage e STAT green signals the correct operation of the module diagnostics The blinking signaling the correct operation has a 1 second period e OUT ON blue it signals if the output is enabled or not The blue LED is on if the output is enabled and us regualting output current or voltage e ALARM red if turned on signals that the power unit has experienced a fault condition It is necessary to perform a reset fault command in order to turn off this LED and to turn to module output again only if the fault condition cause has been removed 1 7 External Interlocks The system is provided with two external interlock inputs that c
25. ation switch e Left Right Up Down arrow pushbuttons e Internal encoder rotation CW and CCW e Central pushbutton it will also be referred to as Enter FAST PS User s Manual 2 2 Display The colour display on the FAST PS power supply unit allows users to visualize information about the power supply status and to control the unit in order to use it locally Screens and pages of the display can be navigated from the navigation switch though user friendly menus and sub menus 2 2 1 Power up The FAST PS upon power up or power cycling will display an empty screen until the unit embedded OS is initialized Please note that this procedure will take approximately 25 seconds before the Home Screens displayed i ER FAST PS User s Manual 2 2 2 Home Screen The FAST PS home screen is the first loaded page upon power up or power cycling of the module it is shown in Figure 15 and contains information on e the FAST PS model e the module IP address e output current readback value A with the light blue status bar e output voltage readback value V with the green status bar e the status of the output 1 e ON or OFF e the status of the control 1 6 Local or Remote e the module Identification Name e the regulation mode of the unit 1 e constant current or constant voltage FAST PS i 2040 6800 a 13 4875 A si CURRENT epy GE wv 38 1082M o Geer For Science
26. bles 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 with low condensation FAST PS 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 0 C to 50 C 30 to 85 RH non condensing 10 C to 60 C 5 to 90 RH non condensing FAST PS User s Manual 1 Introduction This chapter describes the general characteristics and main features of the FAST PS bipolar power supply series 1 1 FAST PS Overview High performances high efficiency high stability easiness of configuration and maintenance are the key features of the FAST PS power supply series The FAST PS is an independent current or voltage controlled digital bipolar power supply module There are available different models with different current and voltage ranges Model Name Current Voltage Maximum Power FAST PS 0520 100 5 A 20 V 100 W FAST PS 0540 200 5 A 40 V 200 W FAST PS 0580 400 5 A 80 V 400 W
27. ck 2 The value to be set is in ASCII format representing the interlock name Example if the interlock 1 is associated to the cabinet door open the following command can to be se sent to the power unit MWG 93 Cabinet door r This setting has not effect if the interlock is disabled 1 8 Internal Protections The FAST PS is equipped with several internal protections that allow configuring the unit for optimal operation These protections have the dual use of protecting the unit and the connected load device from unwanted damages or undesired operation conditions A brief description of the FAST PS internal protections is hereafter presented with some more basic considerations on their operation and use OTTO O_o FAST PS User s Manual 1 8 1 Earth Leakage Current This protection continuously monitors the current flowing to earth and it has a settable threshold A that can be set by experienced users The tripping of this protection generates a fault condition that shuts the power supply output off 1 8 2 Earth Fuse An earth fuse is present on the rear side of each FAST PS and it is rated at LA Class T The blowing of this fuse generates a fault condition of the power unit and the fuse needs to be replaced in order to get rid of the fault condition before resetting the FAST PS internal status register The fuse housing is shown in Figure 13 Figure 13 earth fuse housing 1 8 3 Regulation Fault This fault is ge
28. d The MWV command can be used to set the output voltage value when the constant voltage mode is used see LOOP Command The use of this command is alternative to the MWVR Command ramping voltage command This command has the following format MWV voltage_setpoint r n where voltage_setpoint is the desired voltage set point expressed in Volts V Replies from the FAST PS to a MWV set are in the form AK r n when the command is correctly executed or NAK r n when the command cannot be executed xx 1s the error code To read last applied voltage setpoint the query command MWYV has to be used The response to this query command 1s in the following format MWV voltage_setpoint r n where MWI is the echo string volfage setpoint is the last applied current setpoint expressed in Volts V Examples MWYV set example with current setpoint 10 525 V MWV 10 525 r j 7 AK r n MWV set example when the module is OFF MWV 10 525 r i NAK 13 n MWI query example MWV r i MWI 10 525 r n au C FAST PS User s Manual Software Commands 3 5 11 MWIR Command The MWIR command can be used to perform a ramp to the given current setpoint This command can be used when the constant current mode is selected see LOOP Command The use of this command is alternative to the MWI Command The difference between the MWI command and the MWIR command is that the fir
29. ds 3 6 3 PASSWORD Command The PASSWORD command can be used to unlock or lock the access to the protected parameter fields Several parameters are protected in order not to let inexperienced users to change some power supply parameters that might compromise the correct operation of the module See the Parameters table for further details regarding the password protected cells parameters with User access privileges are not password protected parameters with Admin access privileges are password protected parameters with Read Only access privileges cannot be modified The correct form format for this command 1s as follows PASSWORD password_word r n where password_word is the password to lock or unlock the protected parameter fields that can be e PS ADMIN to receive the Admin access privileges and unlock the protected parameter fields e LOCK to return to User access privileges and lock the protected parameters fields Replies from the FAST PS to a PASSWORD command are in the form FA K r n when the command is accepted or NAK xx r n when the command is not accepted v is the error code When a wrong password word is received the unit replies with a NAK r n error code 07 invalid password and locks the protected parameter fields To read the current privileges level the following query command can be used PASSWORD The response to this query command is in the following
30. elect the regulation mode C C or C V and to set the slew rate in A s or V s depending on the selected regulation mode An example of a Config Page visualization is shown in Figure 19 FW Version 0 9 01 Figure 19 Config Page The firmware installed version is shown at the bottom of this page FW Version FAST PS User s Manual 2 2 3 3 Advanced Page The Advanced Page is reachable by selecting the corresponding rectangle from the Menu Page This page allows to locally set the power supply Ethernet IP address the Network Mas and the Gateway An example of an Advanced Page visualization is shown in Figure 20 Figure 20 Advanced Page It is very important to notice that once the OK button has been clicked the user can remotely communicate and get control of the power supply again only by opening a new TCP socket to the IP that has just been set FAST PS User s Manual Software Commands 3 Software Commands This chapter describes the base TCP IP software commands used for the control and configuration of the FAST PS power module 3 1 Command_Syntax The command syntax used by the FAST PS protocol is described in the following sections Commands must be sent in ASCII format and are composed by a command field and one two or none parameter field separated by a colon or Ox3A in hexadecimal notation The number of parameter fields depends on the specific command
31. eral the command can be grouped in two categories Write commands and Read commands For write commands there are two specific replies that indicate that the command has been correctly elaborated or not Those replies are hereafter presented gt AcKnowledge AK indicates that the command is valid and it was correctly elaborated by the device AK r n e AK is the AcKnowledged response to a valid command e r n is the termination sequence of the reply gt Not AcKnowledge NAK indicates that the command is either not valid or that it was not accepted by the device the NAK reply is followed by an error code field which can be used to determine the cause of the error see the List of the Error Codes appendix for a detailed list of all possible error codes NAK 01 r n e NAK is the Not AcKnowledged response to an invalid command e 1s the parameter s separation character e 01 is the error code e r n is the termination sequence of the reply For read_commands the replies are generally formed by an echo string followed by the corresponding read value The echo string is preceded by the hash 66499 character and the echo is separated from the separation character gt O FAST PS User s Manual Software Commands Some examples are hereafter shown MRI r gt gt MRI 12 8875 r n or MWI r gt i MWI 10 9850 r
32. format PASSWORD privileges_level r n where PASSWORD is the echo string and privileges_level is the string indicating the privileges level The privileges level ADMIN indicates that the user is able to modify the protected parameter fields otherwise USER indicates that the uses is able to modify only the not protected parameter fields The password to unlock password protected cells ts PS ADMIN Software Commands FAST PS User s Manual Examples PASSWORD example of correct password word unlock the protected cells PASSWORD PS ADMIN _ AK r n PASSWORD example of correct password word lock the protected cells PASSWORD LOCK r AK r n PASSWORD example of PASSWORE PASS PASS 70 FAST PS User s Manual Software Commands 3 6 4 MSAVE Command The MSAVE command can be used store the parameter fields in the non volatile internal memory If the parameter fields are not saved they will be lost at power off of the power supply Replies from the FAST PS to a MSA VE are in the form A K r n when the command is correctly executed or NAK xx r n when the command cannot be executed xx is the error code Example MSAVE example Mechanical Dimensions FAST PS User s Manual 4 Mechanical Dimensions The mechanical dimensions of the FAST PS unit are hereafter presented in Figure 21 Figure 21 FAST PS Mec
33. given packet is elaborated directly by the hardware logic This approach eliminates the software stratification that manages the packet and the computational time is smaller and deterministic allowing a very high update rate of the setpoint giving the user more flexibility and excellent rates for the digital control of the power supply 1 2 FAST PS at a glance The FAST PS system is composed by a single 19 inch 1U crate The FAST PS unit and its I O connections can be easily seen in Figure 1 front view and Figure 2 rear view Figure 1 FAST PS front view On the front side of the FAST PS unit are placed a power switch a colour graphic display with navigation switch for the local control of the module three communication sockets 2 SFPs and one Ethernet ports four status LEDs and one USB device connector CSC FAST PS User s Manual Figure 2 FAST PS rear view On the rear side of the unit are placed AC power line input fuse holder the output connection the D Sub 15 Female Pin I O connector From units of all models with SN ending in x010 and later a separate connector for the voltage remote sensing is also present below the I O connector The used fuse by the FAST PS series has the fast acting blow characteristic with LA fuse current Some models can mount one or two BNC connectors reserved for additional features of the power supply FAST PS User s Manual LA Modes of Operation The FAST PS sys
34. hanical Drawings FAST PS User s Manual Technical Specifications 5 Technical Specifications The main technical specifica e FAST PS models are hereafter presented Technical Specific 5A SE Output current range a A 30 A oltage rang V 80 V Maximum output power Up to 600W tion Type Current setting resolution 18 bit ing resolution 18 Output curret readback 20 bit Output current ripple 30 ppm FS Output voltage stability 50 ppm FS Max Current Voltage update rate SFP SFP 10 kHz Accuracy gt lt 0 05 2 Inputs user configurable dry contacts Ecternal Interlock States 1 Output magnetic relay type 3 contacts DC Link Under Voltage Over Temperature Input Over Current Crowbar Earth Leakage Current Regulation Fault Itnernal Interlocks Input fuses Hardware protections Earth fuse 73 74 Technical Specifications FAST PS User s Manual Technical Specifications FAST PS Auxiliary ADC Read Backs DC Link Voltage 16 bit resolution Ground Leakage Current DOS Heatsink Temperature Drivers EPICS at by point current waveform erlock thresholds active levels and imings ote update Extra features Graphic Display and E 6 leds
35. hen the constant voltage mode is selected see LOOP Command The use of this command is alternative to the MWV Command The difference between the MWI command and the MWIR command is that the first one generates a direct change in output voltage characterized by the PID regulator parameters while the second one makes the power supply go from the previous to the actual current value performing a ramp defined by a slew rate in V s The default value of the voltage slew rate is stored in the parameter table see the Configuration Commands To dynamically change the slew rate value it is possible to use the MSRV Command This command has the following format MWVR final_ramp_setpoint r n where final_ramp_setpoint is the final voltage value expressed in Volts V to which the power unit will ramp with the defined slew rate Replies from the FAST PS to a MWVR set are in the form AK r n when the command is correctly executed or NAK xx r n when the command cannot be executed Ce the error code To read the selected final ramp setpoint the query command MWIR has to be used The response to this query command is in the following format MWVR final_ramp_setpoint r n where MWVR is the echo string and final_ramp_setpoint is the final ramp setpoint expressed in Volts V Examples MWVR set example with final ramp setpoint 15 2 A MWYVR 15 2 r AK r n MWVR set example when the module
36. is OFF MWYVR 15 2 r i NAK 13 r n CR FAST PS User s Manual Software Commands MWVR query example MWIR r gt MWIR 15 2 r n Software Commands FAST PS User s Manual 3 5 14 MSRV Command The MSRV command can be used to dynamically change the value of the voltage ramp slew rate The default slew rate used at start up of the unit is the value stored in the parameters table This command has the following format MSRV slew_rate r n where slew_rate is slew rate for the voltage ramp expressed in Volts per second V s Replies from the FAST PS to a MSRYV set are in the form A K r n when the command is correctly executed or ZNAK r n when the command cannot be executed xx is the error code To read the current used slew rate for the voltage ramp the query command MSRV has to be used The response to this query command is in the following format MSRV slew_rate r n where MSRV is the echo string and slew rate is the slew rate value used for the voltage ramp expressed in Volts per second V s Examples MSRV example to set the current slew rate to 10 V s MSRV 10 r e AK r n MSRV set example when the FAST PS is in local mode MSRV 10 r x NAK 15 r n MSRV query example MSRV r MSRV 10 r n SS FAST PS User s Manual Software Commands 3 5 15 MRT Command The MRT command returns the value of
37. n where MRG is the echo string parameter index is the parameter s index and parameter_value is the parameter caption The FAST PS replies with NAK r n when the command cannot be executed 117 is the error code for example if the given parameter is out of the permitted range Examples MRG example of the PS Model parameter 1 MRG 1 r e _ MRG 1 FAST PS 2020 400 r n MRG example of read a not valid parameter s index parameter 1 MRG 1 r b NAK 03 r n Software Commands FAST PS User s Manual 3 6 2 MWG Command The MWG command lets users write a desired value in the given parameters index MWG parameter_index parameter_value r n where parameter_index is the parameter s index and parameter_value is the content to be written Replies from the FAST PS to a MWG write are in the form AK r n when the command is correctly executed or NAK r n when the command cannot be executed xx is the error code After a MWG command the values are immediately applied but they are not stored in the internal memory To store the modified parameters in the non volatile internal memory it is necessary to use the MSAVE Command Examples MWG example of the Module ID parameter 30 MWG S0 MAGNET AV s FAK r n MWG write example to the read only filed 1 PS Model MWG 1 MAGNET Av EAR vu CR FAST PS User s Manual Software Comman
38. n are shorted Do not apply voltage between any input interlock and its corresponding return The configurability of the FAST PS series allows users to decide what interlock are enabled or not set the interlock trip level 1 e low or high the time of intervention the time that an interlock signal has to be at the trip level before generating a fault condition and an associated interlock name This configuration can be set and read using the MRG and MWG commands which allows setting the advanced configuration parameters The interlocks are disabled by default From FAST PS of any model with SN Serial Number ending with x10 and later 1 e x11 x12 etc there is a different voltage sensing connector on the rear panel that allows using the voltage sensing feature especially when using the power supply in C V mode Connector is shown in Figure 6 ES FAST PS User s Manual Pin 1 Pin 4 Figure 6 Remote Sensing Connector 1 5 1 Remote Sensing The FAST PS can be used in constant voltage CV mode and two remote sensing terminals are present on the corresponding connector on the rear panel Vsense on pin 1 S Moart on pin 2 Vour on pin 3 VSENSE on pin 4 S By using these two sensing pins it is possible to sense the output voltage directly on the load thus recovering possible voltage drops on the output cables up to 0 5V It is strongly suggested to use twisted c
39. nerated when the power supply is not able to correctly regulate the output current or output voltage in CC and CV mode respectively Different thresholds forthe differential current differential voltage and the intervention time can be set by experienced users A typical example of a regulation fault is represented by a 10 Q load on a FAST PS 3020 600 for example where the maximum power supply output voltage is 20V By setting a current of 5A to the load the output voltage should reach a value of SOV which obviously is not feasible once the power unit supplies 2A to the load it already reaches the maximum output voltage condition The power unit recognizes this difference between the set point 1 e SA and the actual output current thus generating a regulation fault condition The tripping of this fault implies an automatic turning off of the FAST PS unit A status reset 1 e reset faults needs to be performed in order to turn the unit back on GC FAST PS User s Manual 1 8 4 Input OVerCurrent OVC The internal current drawn from the AC DC power section of the unit is sensed by a hall transducer that in conjunction with a comparator generates a signal that turns off the device The threshold value of intervention depends on the FAST PS specific model and cannot be changed by the user The tripping of this fault generates a latched fault condition that needs to be reset by the user before turning the
40. orking parameters The write access to several parameters is password protected and certain parameters are read only and so it is not possible to modify them To change the password privileges use the PASSWORD Command In order to save the parameter on the on bard non volatile memory the MSAVE Command has to be used The complete list of the configuration parameters its field index and the access privileges are hereafter shown gas Access Privileges Parameter Name 0 Read Only Firmware ID 1 Read Only PS Model 2 Read Only Serial Number 3 Read Only MAC Ethernet 4 Read Only MAC SFP 1 5 Read Only MAC SFP 2 6 8 Reserved 9 Read Only Calibration date 10 Read Only Current Calibration Parameter a 11 Read Only Current Calibration Parameter b 12 Read Only Current Calibration Parameter c 13 Read Only Current Calibration Parameter d 14 Read Only Voltage Calibration Parameter a 15 Read Only Voltage Calibration Parameter b 16 Read Only Voltage Calibration Parameter c 17 Read Only Voltage Calibration Parameter d 18 Read Only DC Link Calibration Parameter a 19 Read Only DC Link Calibration Parameter b 20 Read Only AC Link Calibration Parameter a 21 Read Only AC Link Calibration Parameter b 22 Read Only Current Leakage Calibration Parameter a 23 Read Only Current Leakage Calibration Parameter b 24 29 Reserved 30 User Module Identification 31 User Default Current Slew Rate A s 32 User Default Voltage Slew Rate V V
41. ory configured at the time of purchase to have the Trigger Input and or the Analog Control Input features 1 4 Installation The FAST PS M module can be used either as a desktop unit or as a rack mount device since the unit form factor is designed to be installed it in a standard 19 inch cabinet The AC line input connector on the rear panel is a standard IEC male socket as shown in Figure 3 The module is designed for universal AC input range since it can operate with voltage from 100V to 260V and input frequency ranging from 47 Hz to 63 Hz All the FAST PS M units are directly shipped with the corresponding power cord suitable for the destination country of the purchase 8 oF FAST PS User s Manual AC INPUT A LE AC INPUT VOLTAGE 100 240 V FREQ 50 60 Hz POWER 1 2 kW MAX On Figure 3 AC Power Line input socket For safety reasons the mains supply voltage ratings should not exceed above voltage range FAST PS User s Manual 1 5 Connectors The load needs to be connected to the output connector placed on the rear panel of the unit as shown in Figure 4 This type of connector offers a convenient and reliable form of connection it is suggested to connect the wire directly to the connector The suggested cross sectional area of the cables is rated to be from AWG 24 to AWG 6 OUTPUT Figure 4 Output Connector The symbols and on the rear panel indicate the positive
42. put OVC Input Over Current 16 reserved 15 reserved 14 reserved 13 Waveform Waveform is in execution 12 Ramping Module is ramping current or voltage 11 reserved 10 reserved 9 reserved 8 reserved 7 Update mode bit 1 normal waveform Triggered FIFO analog input 6 Update mode bit 0 normal waveform Triggered FIFO analog input 5 Regulation mode C C or C V output regulation mode 4 reserved 3 Control Mode bit 1 Indicates the mode of operation of the unit LOC REM FCI 2 Control Mode bit 0 Indicates the mode of operation of the unit LOC REM FCI 1 Fault condition This bit is set if the module has experienced a fault condition 0 ON OFF This bit is set when the module is enabled and correctly regulating the output Table 7 Status Register structure FAST PS User s Manual 2 Local Control This chapter describes the local control functionalities that are provided by the FAST PS power supply and some useful information on how to use it The power supply can work either in LOCAL mode or in REMOTE mode Please note that only readbacks are allowed from the remote communication interfaces when the unit is in LOCAL mode Oe settings are inhibited 2 1 Navigation Switch Each FAST PS power supply module is equipped with a Navigation Switch on the front panel of the unit as shown in the following Figure 14 Figure 14 Navigation switch There are multiple actions that can be performed via this front navig
43. s QO 66 Software Commands FAST PS User s Manual Access Privileges Parameter Name 33 39 il Reserved 40 User PID I Kp_v 41 User PID I Ki_v 42 User PID I Kd_v 43 User PID I Kp_i 44 User PID I Kii 45 User PID I Kd_1 46 User o PID I Upper Limit Acc_v 47 User PID I Lower Limit Acc_v 60 een PID V Kp_i 61 Use ID V Kii 62 User PID V Kd_1 PID V Ki_v PID V Kd_v PID V Upper Limit Acc_1 PID V Lower Limit Acc Reserved Max Current Setpoint D Ee Max Voltage Setpoint V Min DC link Threshold Earth Leakage Limit Rescind 87 Admin Voltage Regulation Fault Limit A 88 d Regulation Fault Intervention Time s 89 Reserved 90 n ck Enable Mask 91 Admin Interlock Activation State 92 Admin lt Interlock 1 intervention time ms 93 Admin Interlock 1 name 94 Admin Interlock 2 intervention time ms 95 Admin Interlock 2 name 96 Admin Interlock 3 intervention time ms 97 Admin Interlock 3 name 98 99 Reserved Table 10 Parameters table FAST PS User s Manual Software Commands 3 6 1 MRG Command The MRG command returns the value stored in the given parameter number The correct form for the reading request 1s as follow MRG parameter_index r n where parameter_index is the index of the parameter to be read The response to the MRG command 1s in the following format MRG parameter_index parameter_value r
44. sed 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 Replies from the FAST PS to a MRESET command are in the form A K r n when the command is correctly executed or NAK xx r n when the command cannot be executed xx is the error code The complete list of the error codes is shown in the Error Table Examples MRESET command example MRESET r AK r n MRESET command example when the module is in local mode MRESET r j NAK Mu CC FAST PS User s Manual Software Commands 3 5 6 MRI Command The MRI command returns the readback value of the power supply actual output current The readback current value is represented with 6 digit precision Replies from the power supply to this command are in the following format MRI current_value r n where MRI is the echo string readback in Ampere A ut_value is the output current value Example Software Commands FAST PS User s Manual 3 5 7 MRV Command The MRV command returns the readback value of the power supply actual output voltage The voltage readback value is represented with 6 digit precision Replies from the power supply to this command are in the following format MRV voltage_value r n where MRV is the echo string readback in Volts V 2 value
45. st one generates a direct change in output current characterized by the PID regulator parameters the command is ideally suited for small output current changes and feedback purposes while the second one makes the power supply go from the previous to the actual current value performing a ramp defined by a slew rate in A s The default value ot de slew rate is stored in the parameter table and it can be read and modified using the Configuration Commands To dynamically change the current slew rate value it is possible using the MSRI Command This command has the following format MWIR final_ramp_setpoint r n where final_ramp_setpoint is the final current value expressed in Ampere A to which the power unit will ramp with the defined slew rate Replies from the FAST PS to a MWIR set are in the form ZAK r n when the command is correctly executed or NAK xx r n when the command cannot be executed Ce the error code To read the selected final ramp setpoint the query command MWIR has to be used The response to this query command is in the following format MWIR final_ramp_setpoint r n where MWIR is the echo string and final_ramp_setpoinf is the final ramp setpoint expressed in Ampere A Examples MWIR set example with final ramp setpoint 10 5 A MWIR 10 5 r AK r n MWIR set example when the module is OFF MWIR 10 5 r i NAK 13 r n RE Software Commands F
46. tem has multiple features and multiple configurations that allow using the unit for a very widespread topology of applications A brief summary of the basic configurations that the unit is able to handle are hereafter presented 1 3 1 Regulation Mode The FAST PS can be used as current controlled or voltage controlled bipolar units The regulation types are e C C mode it is the Constant Current regulation mode The power supply regulates the output current set by the user e CN mode it is the Constant Voltage regulation mode The power supply regulates the output voltage set by the user In C V mode it 1s possible to use the remote sensing terminals that allow regulating the output voltage directly on the load thus compensating the voltage drops on the output cables The maximum voltage drop that the power supply is able to compensate is of 0 5V 1 3 2 Control Mode The FAST PS unit_can be controlled in three main different ways hereafter listed e LOCAL control the unit can be controlled directly via the front panel color display and the navigation switch When the unit is set in LOCAL mode it is possible to perform readings and monitor from the remote interface but any setting command is denied e REMOTE control the unit is controlled via the TCP IP Ethernet interface The setting and control of the unit can be performed exclusively via this interface while monitoring 1s still possible from the local display e FAST INTER
47. 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 Z WARNINGZ Do NOT open the boxes CAEN ELS d o o declines all responsibility for damages or injuries caused by an improper use of 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 FAST PS User s Manual Read over the instruction manual carefully before using the instrument The following precautions should be strictly observed before using the power supply 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 ca
48. the temperature directly measured on the output stage MOSFET heatsink The response to the MRT command is in the following format MRT temperature r n where MRT is the echo string and temperature is the temperature value expressed in Celsius C The MRT command being a reading command returns a response in any module condition Example MRT command example MR De MRT 37 4 r n Software Commands FAST PS User s Manual 3 5 16 MRW Command The MRW command returns the actual value of the estimated active power applied to the connected load The response to the MRW command is in the following format MRW active_power r n where MRW is the echo string and active power is the output active power readback expressed in Watts W estimated as the product of the output voltage and output current readbacks The MRW command being a reading command returns a response in any module condition Example MRW command example MRW r p ___ MRW 100 4542 r n FAST PS User s Manual Software Commands 3 5 17 MGC Command The MGC command returns the readback value of the actual leakage current of the FAST PS unit The response to the MGC command 1s in the following format MGC leakage_current r n where MGC is the echo string and leakage_current is the earth leakage current expressed in Ampere A When a leakage fault condition is tripped the MGC command will return the v
49. ub menu ts lightened in a lighter shade e Control sub page e Config sub page e Advanced sub page e Reset faults action e Return to main action The access to each sub menu or action is necessary to highlight the selected rectangle by using the encoder or the arrows of the navigation switch and press the Enter button The Reset faults rectangle once pressed resets the status register of the power supply and sends back to the visualization of the Home Screen The Return to main rectangle once pressed sends back the visualization to the Home Screen FAST PS User s Manual 2 2 3 1 Control Page The Control Page is reachable by selecting the corresponding rectangle from the Menu Page The Control Page gives access to the main settings of the FAST PS power supply unit An example of a Control Page visualization is shown in Figure 18 Figure 18 Control Page From this screen 1s possible to turn the power supply unit ON and OFF and it is possible to set the output current or voltage depending on the regulation type C C or C V Actual values of output current and output voltage readbacks can also be seen at the bottom line of this page SCH FAST PS User s Manual 2 2 3 2 Config Page The Config Page is reachable by selecting the corresponding rectangle from the Menu Page This page allows the user to set the control mode of the power supply e g LOCAL or REMOTE to s
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