BPS COF.L.BEC1 CDE BIPOL IEEE User Manual B-EC1
Contents
1. Bruker Biospin Page 17 1 2 7 External reference 0 10 Volt Pushing the key CUR twice and SET for complete this function allows to have the power supply controlled by an external reference voltage scale 0 to 10V The polarity of the output current is still determined by the reversal unit if supplied EXT Read source of reference should be 1 EXT 1 Enable external reference EXT 0 Set internal reference DAC The readout displays Ext Ref but can be changed with the Display selection key as can be seen in chapter 1 2 9 It may be interesting to switch to the ADC readout of the output current Example O Hey O POSEEN SSE 0 ONNNAref DC SET CUR LOCAL ON O REMOTE DC is on DAC current is at 0 0000 amperes Push the CUR key first time O eGoker BECT CSS5 Intern Ref DC ISE LOCAL O REMOTE O The LED on the CUR key is blinking Intern Ref is displayed Push the CUR key a second time O O BOSA R BECI Extern Ref DC O SET UR LOCA2. Bruker Biospin Page 12 DC set is displayed for 1 second the LED on the DC key is lit DC CUR O SR BEC 1 ESS 0 NNNNAref O ON LOCAL REMOTE DAC value 0 0000Aref is displayed see chapter 1 2 9 Display selection Bruker Biospin Page 13 1 2 4 Set polarity positive negative Pushing the key DC twice and SET for complete the reversal unit will be switched from positive to negative polarity or from negative to positive polarity according to the status read back the cycle function must be inactive the controller state must be OOH Display and remote show during the switchover time of the unit Using the display selection key POL UNIT is displayed in the Reference state see chapter 1 2 9 Display selection Upon changing the polarity the DAC current ramps to zero the external reference or BH 15 will be switched off if it was active The controller waits for the ADC read back to be near zero and adds two extra seconds for security Now the reversal unit will be started Upon the correct read back of the polarity the external reference or BH 15 will be switched on
3. CYC 1Cycle start Push the CUR key once more for reaching the next menu The LED is always blinking O oo O epGien eec 200 000Aref DC Jf SET cu 9 LOCAL ON O REMOTE O Set upper limit The upper limit of the cycle current is set Encoder is allowed the value is given in amperes At the initialization the upper limit is set to the current maximum ex 200 A CCU Read Cycle Current Up CCU nn Set Cycle Current Up Bruker Biospin Page 27 Push the CUR key once more to reach the next menu The LED is always blinking O oo ehGsen eec 19 83 2A sS DC fo SETI jj e Loca ON O C7 REMOTE O Set steprate up Encoder is allowed the value is given in amperes per second and is limited to 10 seconds for the full current range ex about 20 A s for 200A At the initialization the steprate up is set to the maximum current rate RCU Read Rate Current Up RCU nn Set Rate Current Up Push the CUR key once more for reaching the next menu The LED is always blinking ehosen seci CXD 1s DC I SET EUR LOCAL ON O REMOTE O Set time upper limit E
4. Remote commands are STA Read power supply state see chapter 2 1 1 RST 0 Reset error 1 2 2 1 Command flow abort The command can be reached by keeping the DC key more than 1 second pressed This can be useful if the command flow is locked in a state see explanations in 2 1 1 Ex the command flow can be locked in a state which waits for a polarity reversal unit interlock state 1C Hex or 30 Hex see 2 1 1 or in a state which waits for an ADC read back ex 08 Hex It can be possible that the polarity reversal unit or the ADC has some damage which locks the controller in the respective state The command flow can be reset with this function so you don t have to set electronic power off Please before aborting the command flow keep in mind that some states can take a long time before there are resolved By a reset of the command flow the cycle is aborted too Ex You set the polarity reversal unit negative and the controller is locked on the state 30 Hex wait for polarity reversal unit interlock for a long time That can result from a damage of the polarity reversal unit off O epggsa ee STATF 30H DC I ISET zr LOCAL ON O REMOTE O DC power is ON the controller is in the state 30Hex wait for the negative read back of the reversal unit Press and hold the DC key 2 ROSER BEC1 y a DC off ISET CUR LOCAL ON O REMOTE O The LED on D
5. O CSJ BEC 1 Ose 5 6297Aref DC SET CUR 9 LOCAL O REMOTE I O O DAC current is set to the stored value before setting the polarity Internal reference external reference or BH 15 are set which ever was active see chapter 1 2 5 Bruker Biospin Page 15 1 2 5 Set current The system offers three possibilities to set an output current Internal reference external reference or field controller BH 15 the cycle function must be inactive the controller state must be 00H The next chapters will explain the different modes of operation here are summarized the remote commands to switch from one mode to another EXT Read source of reference EXT 0 Enable internal reference EXT 1 Enable external reference EXT 2 Enable BH 15 control 1 2 6 Internal reference DAC The current of the power supply can be set using the CUR key the cycle function must be inactive the controller state must be OOH The blinking LED shows that the analog control knob is allowed Turning the knob slowly the output can be changed by single bits increasing the speed will change the output at a more than proportional rate The output current will change at a current rate This quasi analog setting is stored in the internal memory of nominal values and can be preset and read back using the appropriate command key or remote command This function should be completed with SET Any change of the output value
6. RCD Read Rate Current Down RCD nn Set Rate Current Down Push the CUR key once more to reach the next menu The LED is always blinking O ZSR BEC1 F Y Z BhORER 1s DC oO SET If LOCAL ON O z REMOTE O Set time lower limit Encoder is allowed the value is given in seconds At the initialization the lower time is set to 1 second WCD Read Wait Current Down WCD nn Set Wait Current Down 0 65535 s TID Read actual time Down decreased by cycling Push the CUR key once more to enter the next menu The LED is always blinking During the initialization the upper time is set to 1 second O ae O ose 1x DC ISET iI LOCAL ON Q 2 g REMOTE O Set number of cycles The encoder is allowed Upon electronic power off the value is saved by battery buffering The actual cycle number can be read on the display using the Display selection key CNB Read number of cycles CNB nn Set number of cycles 0 65554 0 is corresponding to 65536 Cycles NBR Read actual cycle number decreased by cycling Bruker Biospin Page 29 In the last menu a press on the CUR key enters the first menu CYCLE END again If you press SET here all changes are stored but the cycling is
7. Reset DC IIIBET CUR LOCAL ON O REMOTE O RESET is done the text is displayed for 1 second Phase error is still pending O oo O PESEE Air PHASE ERROR DC SET I CUR E LOCAL ON O O REMOTE Check the cause of the error see chapter 1 1 2 and after correction push the DC key again O CC BEC 1 4 O Ose Reset I Lo JISETI cUR LOCAL ON O 4 REMOTE O The LED on DC key is blinking needs SET for complement Push the SET key Bruker Biospin Page 9 RESET is done the text is displayed for 1 second O COO O PESES eS Internal Ref DC SET oi 9 LOCAL ON O REMOTE O No more errors pending The power supply will be able to set DC power on
8. The controller remains in the state WAIT POL READ BACK for a very long time the controller is still waiting for the correct polarity read back The second hexadecimal byte 2 contains information s about the power supply status Every information is allocated to one bit ex remote bit 0 If an information is true the bit is active 1 otherwise it is inactive 0 The byte is the addition of all status bits and can be decoded to find the individual information The third and the fourth hexadecimal bytes 3 4 contain information s about the power supply interlocks Every interlock is allocated to 1 bit ex water byte 4 bit 0 overcurrent byte 3 bit 0 If an interlock is true the bit is active 1 otherwise it is inactive 0 The bytes are the addition of all bits and can be decoded to find the individual information Please see 1 1 2 status information s Bruker Biospin Page 36 STA 00 25 00 13 Error byte LSB Error byte MSB Status byte continued Value hex oF ND 0 20 40 80 Value hex co A N gt Value hex gt OF Na 40 80 Error bvte LSB Error bvte MSB Status bvte State machine Explanation Water flow Phase error Overtemperature External error 1 Door open Ground fault Not used External error 2 Not used Reserve Not used Explanation Overcurrent Load error Not used Polarity unit Not used Inrush error Explanation Remot
9. gt lt BRUKER lX BPS COF L BEC1 CDE BIPOL IEEE User Manual B EC1 BRUKER Page 1 1 1 1 1 1 1 1 2 1 2 1 2 1 1 2 2 1 2 2 1 1 2 3 1 2 4 1 2 5 1 2 6 1 2 7 1 2 8 1 2 9 1 2 10 1 3 2 1 2 1 1 2 2 Description of B EC1 Local and remote control of the power supply Local control via front panel Theory of operation Analog knob Status information s Explanation of available functions Change of local remote state Reset of power supply Command flow abort DC power on off Set polarity positive negative Set current Internal reference DAC External reference 0 10 Volt External regulation BH 15 field stabilization option Display selection ADC read back Cycle function Remote control via RS 232 C via IEEE488 selecting address and end sign Commands and arguments Power supply state Example of operation Installation of BH 15 control setup Hardware information Page A BR OQ O ONN _ _ 15 15 17 19 21 24 25 30 30 30 32 35 39 40 41 Bruker Biospin Page 2 P SAA AAG ac O Ha fe eesesy Ps DC I SET cUR LOCAL ON O REMOTE 1 Display DAC current ADC read back DC on off and error messages 2 Key DC ON OFF RESET POLARITY with LED needs SET for complement 3
10. 24 V Com 24V Water error Temp error Door error External error 2 Common interlock indicator 24 V Normal polarity command Normal polarity indicator nc nc ADC voltage AGnd Control SEM BH 15 field correction NC NC ADC shunt AGnd AGnd AGnd AGnd AGnd AGnd AGnd AGnd AGnd nc nc nc Bruker Biospin
11. Key Display selection ADC read back 4 Key SET complement for every LED blinking command 5 Key CUR EXTERNAL REFERENCE BH 15 REGULATION and CYCLE with LED needs SET 6 Analog knob T Remote local key 8 Electronic ON key Explanation of technical terms not all topics applicable for all power supplies ADC DAC LED AC DC DCCT APB Analog knob RS 232 C G Uce Analog Digital Converter converts analog voltage to a digital code Digital Analog Converter converts digital code to an analog voltage Light Emitting Diode Alternate Current Direct Current DC Current Transformer zero flux current transformer Analog Processing Box contains DCCT and regulation prints Digital encoder can be used like an potentiometer Serial interface norm Degree Celsius Collector emitter voltage of power stage Bruker Biospin Page 3 1 Local control via front panel 1 1 Theory of operation The following chapters describe the local operation of the power supply controller B EC1 Throughout the text the commands and messages concerning the serial interface are described parallel to their manual operation 2 O ROSER BEC 1 co Internal Ref DC ISET em LOCAL ON O REMOTE Q Upon electronic power on the controller is in an initialization state DC is off the reference is set internal and the nominal current is set to zero Reacting on any key press the status of the power supply is displayed on the front
12. again if it was active The DAC current is set to the stored value before setting the polarity During the polarity reversal process a time out is set according to the used reversal switch If the read back of the correct polarity is not ok within this time this will be flagged with an error message Also the control voltage of the relay will be reset to avoid a burn out of the coil During this operation most other commands are disabled any wrong command will be rejected with FUNCTION The remote functions are POL 0 no polarity reversal unit supplied 1 polarity positive 2 polarity negative 3 polarity unit busy POL 0 Set polarity positive POL 1 Set polarity negative Example OFT xs eases 4 5 6297Aref DC ISET CUR LOCAL ON O REMOTE O DC power is ON DAC current is set to 5 6297A Push the DC key first time O eather Beci O CSSS DC off I o set icur LOCAL ON O REMOTE QO The LED on DC key is blinking Bruker Biospin Page 14 Push the DC key a second time 7 Bhogen eect CSS Set
13. output can be changed by single bits increasing the speed will change at a more than proportional rate This quasi analog setting is stored in the internal memory of nominal values and can be preset and read back using the appropriate command key or remote command Pushing the SET key disables the knob for the function O CI BEC 1 PESg5 Internal Ref DC II SET CuR LOCAL ON O REMOTE 1 1 2 Status information The power supply is equipped with a security system its status is read out at the text display Every error leading to a power off state of the supply is displayed multiple errors are flagged in a short form as given in the following table By some power supplies not all interlocks are supported and might not appear In detail Short form Explanation WATER ERROR W Water missing PHASE ERROR P Line Phase missing TEMP ERROR T Temperature error DOOR ERROR D Door opened EXTERN E 1 1 External error 1 INRUSH E l Inrush fail CUR LIMIT C Current limit POLARITY E U Polarity Unit The error messages give information s about the status of the power supply Actions necessary upon any error shall now be described more in detail Also here is described what can be done first to recover from an error But please keep always in mind The power supply is operated with lin
14. panel Commands are initiated by pushing one of the command keys When a command needs an argument this will be indicated on the key by a blinking LED The SET key completes every blinking LED command Commands can be skipped by pushing an alternate command key Keys with more than one function like DC CUR and the Display selection key can be pushed multiple times the according menus are arranged in a closed loop Illegal keystrokes are flagged and ignored Possible error messages are Remote info Local message Explanation E01 FUNCTION E Function not supported e g during polarity reversal E02 ARGUMENTE The argument contains unknown characters not likely in local operation E03 PORT N AVAIL Port not available this error is not likely in a single port system E04 LOCAL ERROR Access denied check the local remote switch E05 RANGE ERROR The argument is out of the allowed range not likely in local operation E06 REF ERROR Access denied Ext Ref or BH 15 active E07 E PENDING DC command denied there is still an error pending E08 CYCLE ERROR Access denied cycle is active E09 DC ERROR Access denied DC power is OFF Bruker Biospin Page 4 1 1 1 Analog knob The command CUR allow the use of the quasi analog control knob Turning the knob slowly the
15. to lower limit Wait time lower limit Bruker Biospin Page 39 2 2 Example of operation In chapter 1 2 and the following sub chapters the available commands of the power supply are explained Here these commands are given in an order to explain the typical operation of the power supply After connection of the supply to the load to the cooling water and to mains the electronic of the controller has to be activated with the green key ELECTRONIC POWER Then please switch to remote operation Now the supply is ready to accept commands from the interface Start procedure REM This command should return 1 standing for remote operation RST 0 Reset of all stored errors which might have been stored during startup STA Please refer to chapter 2 1 1 errors should be cleared DCP 1 Activate the main contactor DCP Should return 1 after several milliseconds can be checked several times during the startup of the contactor STA Can be used alternatively to DCP this gives all information bits with one command Operating phase CUR nn Set your output current CUR Gives the momentary current Shut down procedure CUR 0 The current may to be set to zero explicitely DCP 0 Switch off the main contactor The command is effected at the moment when the set current command has finished at zero According to your needs more commands may be added to your program especially for reading ADC values CHN V
16. AI FRROR DC SET cuR a Locat ON O MOTE O The controller is in REMOTE state illegal commands from front panel like set current are flagged with a LOCAL E message Interface RS232C or IEEE are allowed The appropriate interface command consists of a read back only REM Check local remote state 0 local 1 remote Bruker Biospin Page 8 1 2 2 Reset of power supply The power supply is equipped with a security system its status is read out at the text display Every error leading to a power off state of the supply is displayed Error messages concerning the power supply can be reset by pushing the DC key and SET for complement all status information s should be in neutral condition The key may be used in local mode only O Oo O ppugga ese IWP91 DC SET CUR Loca ON O REMOTE O Power supply water W line phase P and external error 2 2 see chapter 1 1 2 Push the DC key aF O Po BEC 1 i err Reset CAES ser P Loon A O a REMOTE O The LED on DC key is blinking needs SET for complement Push the SET key O one O gs
17. C key is blinking hold the key for 1 second Bruker Biospin Page 10 BGogen esci SS Status II SET cur LOCAL ON O REMOTE D Needs SET for complement Push the SET key O KON O sS l STATE Reset DC RET IIcuR Loca ON REMOTE The command flow is aborted the text is displayed for 1 second The state is reset to O0Hex the cycle function is cleared if it was active O A O ese STATE 00H DC SET cuR 9 LOCAL ON O REMOTE O Remote STA 0 Reset command flow STA Read command flow see 2 1 1 Bruker Biospin Page 11 1 2 2 1 1 2 3 DC power on off Using DC and SET for completion DC power will be set when DC OFF and re
18. EMOTE O Push the Display selection key The power stage temperature is displayed in C Push the Display selection key Uce voltage is an option O O 1 3lJce DC CUR LOCAL ON REMOTE The Uce voltage is displayed in Volt Bruker Biospin Page 23 Push the Display selection key CZO BE C1 SS no Cycle DC j SET CUR LOCAL ON 5 REMOTE O The actual number of cycles is displayed if the cycle function is active else no cycle is displayed Push the Display selection key O On D BRRER etc State OOH DC II o SET jom LOCAL ON G REMOTE O The controller state is displayed see 2 1 1 Pushing the Display selection key once more will return to the first value and so on Bruker Biospin Page 24 1 2 10 ADC read back Current and voltage are read from the ADC It converts continuously its read back is calculated from multiple values CHN Read output current VLT Read output voltage
19. ER BECI OS O LOCAL REMOTE ON l O O The LED on the CUR key is blinking Current is displayed Push the CUR key a second time Fxtern Ref DC O BROER Beci COO Q SET LOCAL REMOTE ON Ext Ref is displayed Push the CUR key a third time DC Oa CO BH 15 O SET LOCAL REMOTE ON BH 15 is displayed needs SET for complement Push the SET key O C BEC 1 O PESSA RH 15 set DC CUR LOCAL ON O REMOTE O BH 15 set is displayed for one second O Q CC BEC 1 BRUKER RH 1 5 DC SET jem C9 Loca ON O REMOTE O Display selection is automatically set to the reference state Bruker Biospin Page 21 1 2 9 Display selection This key is used to read the DAC current the ADC value of output current output voltage load resistance power stage temperature option Uce vol
20. L on O O REMOTE Extern Ref is displayed needs SET for complement Bruker Biospin Page 18 Push the SET key O Cos BEC1 O CSS Extern set DC IO ET CUR LOCAL ON O O REMOTE Extern set is displayed one second O ag O egs External Ref DC SET cur LOCAL O REMOTE O Display selection is automatically set to reference state Bruker Biospin Page 19 1 2 8 External regulation BH 15 field stabilization Pushing the key CUR three times and SET to complete this function allows to use external sources or stabilizers NMR Hall The controller is designed to work with a Bruker Hall regulation unit BH 15 The typical operation is Activate the BH 15 unit switch to mode 1 with 1 and MODE Reset any possible error messages of the B EC 1 co
21. LT or for reading the status of the supply STA The power supply is an analog system DAC values and ADC values will never be identical due to intrinsic errors of linearity gain and offset and due to resolution differences Therefore please never compare ADC and DAC values for being identical this condition might never be met and could disturb your program flow Please always define a small error range Bruker Biospin Page 40 3 Installation of BH 15 control setup option The installation of a BH 15 field controller consists of several steps If it has not been done at the Bruker facility the next lines should help to complete this task The controller B EC 1 should be connected and tested in standard operation like switching on and off setting a current and so on If this phase should fail please check the operation manual respective contact Bruker at Wissembourg F and don t continue the setup procedure It should be possible to check the BH 15 by setting it to mode 5 with the keys 5 and MODE then run Now the unit should display the actual field value For operation in closed loop with the B EC 1 it should be set to mode 1 with 1 and MODE Please connect an oscilloscope to print 9707 inside the B EC 1 Ground can be found on test point O TP 0 The tests should be performed on the output of the regulation amplifier TP7 Before testing the BH15 mode disconnect the output capacitor In
22. RES Load resistance calculated from multiple values of ADC current and voltage read back only when the current is higher then 2 of full range POW Read passbank power dissipation option TEM Read power stage temperature in C option UCE Read Uce voltage option Bruker Biospin Page 25 1 3 Cycle The CYCLE function allows cycling between a lower and an upper current limit To reach the cycle menus the CUR key must be hold for one second Reference must have been set to internal operation The first push on the CUR key enters the CYCLE END menu point next push on the same key enters the CYCLE INTERRUPT menu point next the CYCLE START menu point Following points are SET UPPER LIMIT SET STEPRATE UP SET TIME UPPER LIMIT SET LOWER LIMIT SET STEPRATE DOWN SET TIME LOWER LIMIT and SET NUMBER OF CYCLES In the last menu a press on the CUR key enters the first menu point CYCLE END again CYCLE can be left in every cycle menu by pushing the SET key or any key different from CUR During cycling set current operations are not allowed CYCLE can be started in the neutral state only DC must be set Otherwise this would be flagged with a DC ERROR remote E07 The reference must be set to internal flagged with an REF ER remote E06 During cycling the LED on the CUR key is lit set operations are forbidden CYC Rea
23. actual time down decreased by cycling Read Number of Cycles Set number of cycles 0 65535 0 is corresponding to 65536 Cycles Read actual Cycle number decreased by cycling Read the IEEE address 0 gt 30D Set the IEEE address 0 gt 30D should only be used from serial interface 0 CR 1 CR LF 0 set end sign to CR 1 set end sign to CR LF should only be used from serial interface Bruker Biospin Page 35 2 1 1 Power supply state Using the STA command the state of the power supply can be read The read back is given as hexadecimal code which can be easily decoded by an computer The first hexadecimal byte 1 contains information s about the internal power supply state machine see the next page Every command like DC OFF initiates the state machine to the beginning of a group of states ex 05 Hex If the conditions of that state are fulfilled the state counter is incremented Some states are completed very fast ex SET DAC TO ZERO SET DC OFF other states can take a couple of seconds ex TEST ADC 0 WAIT POL READ BACK After the last state the controller returns to the neutral state OOHex Some commands like SET DC ON OFF SET POLARITY POSITIVE NEGATIVE or SET EXT BH 15 REFERENCE are initiated in the neutral state only otherwise they are rejected with a FUNCTION error remote E01 It can be useful for the customer to know the controller state to understand the process of some commands Eg
24. d Cycle state 0 End 1 Running 2 Interrupt mode Menu explanation For reaching the cycle menus the CUR key must be hold 1s The LED on the CUR key is blinking O C BEC 1 O Ose gt FND oc EA LOCAL ON O 7 REMOTE G Cycle end In this menu using the set key a cycle can be stopped Upon a restart the cycle begins to slope up from the actual current value to the upper cycle limit CYC 0Cycle stop Bruker Biospin Page 26 Push the CUR key once more for reaching the next menu The LED is always blinking O Cos z sS gt INTERRUPT DC SET EuR LOCAL ON O REMOTE O Cycle interrupt Using the Set key a running cycle can be interrupted Upon a restart the cycle will restart at the interrupted position CYC 2Cycle interrupt Push the CUR key once more to reach the next menu The LED is always blinking O OD 2 ee e gt START oc Io een e Ea G N7 REMOTE O Cycle Start Also using the key Set a cycle can be started The cycle current upper limit must be different from zero otherwise this will be flagged by an argument error message
25. e enabled BH 15 enabled Not used External reference set Cycle active Reverse polarity Normal polarity DC power on IEEE end sign Bruker Biospin Page 37 State machine Set DC power off Set DC power on continued Value hex OwWwromanrnoan 11 12 13 14 15 16 17 18 State Neutral state Ramp DAC to 0 Reset ext BH 15 ref Test DAC 0 Test ADC 0 Set SEM Set DC off Set ext BH 15 ref Return to neutral state Set DAC to 0 Test ADC 0 Set Inrush relay on Set time 1 second Wait time Set DC relay on Set time 1 second Wait time Reset Inrush relay and test DC indicat Return to neutral state Bruker Biospin Page 38 State machine Set polarity positive Set polarity negative Cycle Value hex State Ramp DAC to 0 Reset ext BH 15 ref Test DAC 0 Test ADC 0 Set time 2 seconds Wait time Reset SEM Set time 2 seconds Wait time Set polarity positive set timeout Wait pol read back check timeout Set SEM Set time 1 second Wait time Set ext BH 15 ref Return to neutral state Ramp DAC to 0 Reset ext BH 15 ref Test DAC 0 Test ADC 0 Set time 2 seconds Wait time Reset SEM Set time 2 seconds Wait time Set polarity negative set timeout Wait polarity read back check timeout Set SEM Set time 1 second Wait time Set ext BH 15 ref Return to neutral state Current ramp to upper limit Wait time upper limit Current ramp
26. e voltages which may be hazardous Therefore please be sure what you are doing before you open any cover or housing Bruker Biospin Page 5 Message Water Error short form W remote 0001Hex Check your local water system all valves should be opened water pressure must be corresponding to the PS documentation also the outlet should not reduce the difference pressure between input to output to less than the value seen in the documentation If the power supply still displays the water error please check the water flow switch Message Phase Error short form P remote 0002Hex One of the line phases might be missing Please check them with a volt meter but please keep in mind the personal hazard of line voltages Also the mains transformer may have a loose connection they can be re fastened after power down of the system Some power supplies have phase follow dependent detectors so it can be useful to exchange two phases Message Temp Error short form T remote 0004Hex This message is derived from several temperature contacts in the power supply First please try to check the impedance of the external load Perhaps it became low e g due to a short circuit This measurement can be made with the power supply itself after cooling down the faulty channel to a sufficient level check the ADC and U read back Another possibility can be a bad cooling water condition e g high input temperature or h
27. ed to 12V If the user should not need this hardware handshake the CTS input of the power supply controller can be connected directly to its own RTS output Bruker Biospin Page 31 via IEEE 488 The control unit is equipped with a standard IEEE 488 interface designed to talk listen and request service The use of this interface assumes familiarity with IEEE 488 standards which are not included in this manual Setup of the system addressing On delivery the controller is set to a base address of 5 Pushing the DC key during 1 second the menu abort command flow status will be entered One push more on the DC key will enter the menu 5 Addr IEEE Using the analog encoder the IEEE address can be changed 0 gt 30D Remote IEA Read IEEE address IEA nn Set IEEE address to 0 gt 30D On delivery the unit uses CR LF with EOI as end sign Also the end sign of the IEEE interface can be change In the menu x Addr IEEE one push on the DC or the SET key will enter the menu CR LF Endsign Turning the analog encoder down the end sign can be set to CR turning again the encoder up the end sign is now set to CR LF again Remote IEE Read the IEEE end sign IEE 0 1 Set the IEEE end sign to CR or CR LF On delivery the unit uses CR with EOI as end sign According to bus specifications the calling station can be found by using a serial poll When the calling power supply contr
28. igh output pressure If these tests should not bring a positive result please check the fuses of the pass bank If more than two transistors should have blown their fuses please change them individually or change the complete pass bank what ever may be easier Message Door Error short form D remote 0010Hex The door on the backside of the power supply is opened The power supply is switched off for security reasons It seems to be a straightforward solution of this error to short circuit the contact but please keep in mind the personal security of you and your staff Option Message Ground Error short form G remote 0020Hex The ground contact relay has tripped due to a ground voltage exceeding about 10 volt This results from a ground leak in the power supply or of the load magnet which can be disconnected to locate the problem Message Extern E 1 or EXTERN E 2 respectively short form 1 or 2 remote 0008Hex or 0040Hex This is a message derived from the external interlock contacts Bruker Biospin Page 6 Message Cur Limit short form C remote 0100Hex The overcurrent detector on the regulation print has detected an overcurrent If the error was not only a spurious trip please check the regulation loop Best ideas about the performance can be found around the regulation amplifier where also the overcurrent circuit is located The ADC on the board is designed to display an overcurren
29. ion key O f On a BROKER BEC 1 0 000A DC O SET jem L LOCAL ON O REMOTE O ADC current read back is displayed 0 000A Push the Display selection key o Fl fo ohGaen BEC1 0 00V DC SET CUR ooa Jon O REMOTE O ADC voltage read back is displayed 0 00V Push the Display selection key O CoD a BROKER BECT OmOhm DC SET jljcur D LOCAL ON O REMOTE Load resistance is displayed In case of a current lower than 2 of maximum current range OmOhm is displayed Push the Display selection key power stage temperature is an option O x22 O erQgen eec 30 2Deg DC a SET INCUR e LOCAL ON O g REMOTE O Push the Display selection key The passbank power dissipation is displayed in W O aoe O erQgeR eec 0 0W DC a SET INCUR eS LOCAL ON O R
30. istance TEM Read power stage temperature C option UCE Read Uce voltage V option Bruker Biospin Page 33 Set polarity POL POL 0 POL 1 External reference EXT EXT 0 EXT 1 EXT 2 Interlocks RST 0 Status STA STA 0 Cycle primary functions CYC 0 CYC 1 CYC 2 CYC Cycle current up CCU CCU nn Cycle current down CCD CCD nn Cycle rate up RCU RCU nn 0 no polarity reversal unit 1 polarity positive 2 polarity negative 3 polarity unit busy Set polarity positive Set polarity negative Test source of reference Internal reference DAC External reference 0 10 V BH 15 control active Reset error message Read all information s about the power supply see 2 1 1 Reset command flow see 1 2 2 1 Cycle stop Cycle start Cycle interrupt Read Cycle state 0 Stop 1 Running 2 Interrupt Read Cycle Current Up Set Cycle Current Up Read Cycle Current Down Set Cycle Current Down Read Rate Current up Set Rate Current up Bruker Biospin Page 34 Cycle rate down RCD RCD nn Cycle time up WCU WCU nn TIU Cycle time down WCD WCD nn TID Number of cycles CNB CNB nn NBR IEEE Address IEA IEA nn IEEE end sign IEE IEE 0 1 Read Rate Current Down Set Rate Current Down Read Wait Current up Set Wait Current up Read actual time up decreased by cycling Read Wait Current Down Set Wait Current Down Read
31. ncoder is allowed the value is given in s seconds At the initialization the upper time is set to 1 second WCU Read Wait Current Up WCU nn Set Wait Current Up 0 65535 s TIU Read actual time Up decreased by cycling Push the CUR key once more to enter the next menu The LED is always blinking O O Cq BEC 1 TF Th PES5F 0 0N0Aref DC ISET ll amp LOCAL ON g REMOTE O Set lower limit The lower limit of the cycle current is set Encoder is allowed the value is given in amperes At the initialization the current lower limit is set to zero CCD Read Cycle Current Down CCD nn Set Cycle Current Down Bruker Biospin Page 28 Push the CUR key once more to reach the next menu The LED is always blinking O CHD BROKER BEC 1 19 832A S DC O SET U 9 LOCAL ON O REMOTE O Set steprate down Encoder is allowed the value is given in amperes per second and is limited to 10 seconds for the full current range ex 20 A s for 200A At the initialization the steprate up is set to the maximum current rate
32. nol DC I SET CUR LOCAL ON O REMOTE The LED on the DC key is always blinking needs SET for complement Push the SET key O C BEC 1 ecs Negative set ocj o CUR Loca on O REMOTE The polarity will be changed to negative because of positive read back Negative set is displayed for one second the LED on the DC key is always lit DC is always ON of 24 O sess 0 0000Aref oc IO SET oa amp car RN O REMOTE O The DAC current ramps to zero Ext REF or BH 15 is reset if it is active OWT ites mee m 20 QOD Aref BOIS Ser oUR e Loca ifo O REMOTE O The polarity reversal unit is busy aN fo Pea BEC 1 onsasr 0 0000Aref Dc oO ser amp Loca ON O REMOTE O Negative polarity is set
33. not yet executed ROKER etc CSS gt END DC SET CUR LOCAL ON O REMOTE O Alternatively you can press CUR twice to go from CYCLE END via CYCLE INTERRUPT to CYCLE START Now with SET cycling is started with the new parameters CYCLE can be left in every cycle menu by pushing the SET key or any key different from CUR During cycling set current operations are not allowed Bruker Biospin Page 30 2 Remote control via RS 232 C The control unit is equipped with a standard RS 232 C interface The use of this interface assumes knowledge about the RS 232 C standards which are not included in this manual The system is set to a data rate of 9600 baud 8 data bits with MSB set to O one start bit one stop bit no parity For special applications these values can be changed The unit gives an echo of all received characters thus allowing a read back check A message has to be finished with CR ODhex the end sign is not echoed For testing purposes it is possible to attach a serial operating terminal The connector is wired as a Data Terminal Equipment DTE The interface serves the CTS line If this input is clamped to a negative voltage the communication is stopped Since the controller is always prepared to accept commands RTS is always ti
34. ntroller with DC and SET Switch on the power supply with DC and SET of the B EC 1 Select the BH 15 function with CUR CUR CUR and SET The B EC 1 should now display BH 15 Now it is possible to set any desired field with the front panel of the BH 15 e g 3500 Gauss with 3500 and CF The reference and DAC of the B EC 1 are disabled the ADC is still working If the power supply should be equipped with a polarity reversal unit please check the position of your probe head in accordance to the selected polarity Automatic reversal units are available which eliminate this problem For additional references please consult the BH 15 manual EXT Read source of reference should be 2 EXT 2 Enable BH 15 control EXT 0 Set internal reference DAC The readout displays BH 15 but can be changed with the display selection key as can be seen in chapter 1 2 9 It may be interesting to switch to the ADC readout of the output current Example O ore PESSE SE 0 0000Aref DC SET jcur 9 LOCAL ON O REMOTE O DC is on DAC current is 0 0000 amperes Bruker Biospin Page 20 Push the CUR key first time Intern Ref DC SET U O BROg
35. oller is in serial poll addressed state a status byte will be sent over the bus with bit 7 set Bruker Biospin Page 32 2 1 Commands and arguments The following format of commands will be used with the interface Command argument and data are transmitted ASCll coded using a fixed format It is useful to check the echo of every command If the first character should be an E the controller could not effect the command Please check the table below Remote info Local message E01 FUNCTION E02 ARGUMENT E03 PORT N AVAIL E04 LOCAL ERROR E05 RANGE ERROR E06 REF ERROR E07 E PENDING E08 CYCLE ERROR E09 DC ERROR Explanation Function not supported e g during polarity reversal The argument contains unknown characters Port not available Access denied check the local remote switch The argument is out of the allowed range Access denied Ext Ref or BH 15 active DC command denied there is still an error pending Access denied cycle is active Access denied DC power is off The next table gives a list of all possible commands The short form nn denotes an argument e g for setting a current Remote local REM Check local remote state DC power DCP Test DC power DCP 0 DC power off DCP 1 DC power on Set current CUR Read actual current value A CUR nn Set current to nn point to go Status line read back CHN Read output current A VLT Read output voltage V RES Read magnet res
36. reference to chapter 1 2 8 Reset any possible error messages and switch on the power supply with DC and SET of the B EC 1 Select BH 15 field control with CUR CUR CUR and SET Now please set a field with the frontpanel of the BH 15 e g 3500 Gauss with 3500 and CF The output line should stay well within the limits of 10 Volt noise and ripple should be comparable with the normal operation without external reference If this line hangs up possibly the hall sensor is positioned in the wrong direction It is possible to adjust the RC feedback on the board W4P20707 near the output with two rotative switches Bruker Biospin Page 41 ON OAR WBDHNDN gt a OE ee ee ee es Ce Cg OAN DOA FR WN O ON OA BWDHN Hardware information Power supply socket Status reserve 2 24 V DC command DC on indicator RST Phase error Ext error 1 Ground error Status Reserve 1 24 V Inrush command 24 V Reverse polarity command Reverse polarity indicator nc ADC voltage 15V 15 V Control SEM Pwr stage control Base Pwr stage control Base ADC shunt NC Analog I O socket Ref output 10V Ref output 10V Fieldstab input Image output Ext reference input high Ext reference input low Ext analog IN 1 Ext analog IN 2 DAC serie 12bits OUT nc nc nc nc 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 14 15 16 17 18 19 20 21 22 23 24 25
37. set when DC ON is read back the cycle function must be inactive the controller state must be 00H The key is disabled in remote state illegal use will result in a LOCAL ERROR message SET DC ON By setting DC ON DAC current is set to zero to avoid transients in the output current If the power supply is set to external reference or BH 15 control the customer has to hold them at zero upon DC ON operation to avoid transients SET DC OFF By setting DC OFF the DAC current ramps to zero DC is reset only when the ADC current is near zero about 2 of full range If external reference or BH 15 is set it will be switched to internal reference and after DC OFF is set again to external or BH 15 reference like before to avoid current transients DCP Test DC power DCP 0 DC power off DCP 1 DC power on Example QO O BROKER BEC 1 CO Internal Ref DC I SET cuR LOCAL ON O REMOTE O No error pending and DC OFF DC can be set using the DC key Push the DC key O cor BEC1 O CSS DC an VIO set a LOCAL ON O j REMOTE O The LED on DC key is blinking needs SET for complement Push the SET key eRGSeA BEC CSS DC set De fo ET CUR LOCAL ON O REMOTE O
38. t and also overvoltage of up to 10 So it might help to check the problem which might result from a failure of the gain or the offset of the regulation but also from a defective driver circuit on the pass bank Message Polarity E short form P remote 0400Hex during the polarity reversal process a time out is set If the read back of the correct polarity is not ok when the time out is passed this will be flagged by an error message Also the control voltage of the relay will be reset to avoid a burn out of the coil Message Inrush error short form P remote 0800Hex the Power ON sequence with Inrush function has failed Example O O ffin eet WP2 De lo SET CUR Loca ON REMOTE O Multiple errors flagged in a short form Power supply water W line phase P and external error 2 2 Bruker Biospin Page 7 1 2 Explanation of available functions 1 2 1 Change of local remote state A key switch is provided to change from local to remote state and back again A change of local remote state can be made at the local front panel only this feature is implemented for security reasons O Cos O idea a Internal Ref DC SET CUR LocaL ON O MOTE O The controller is in LOCAL state commands from the front panel are allowed O am O PESE Sge I OC
39. tage option source of reference number of cycles or the command flow state Initially the value of the reference state or POL UNIT if the reversal unit is busy is displayed The read back information is arranged in a closed loop repeated typing the read back key will return to the first value and on again Remote commands are EXT Read source of reference see chapters 1 2 6 1 2 7 1 2 8 CUR Read nominal current CHN Read output current VLT Read output voltage RES Read load resistance TEM Read power stage temperature option POW Read Passbank dissipation UCE Read Uce voltage option NBR Read actual number of cycles see chapter 1 3 STA Read actual controller state see 2 1 1 Example O packer Beci y O ESS Internal Ref DC j SET CUR LOCAL ON O i REMOTE O Initially the reference state is displayed Internal REF internal reference set Other possible messages are EXT REF external reference set BH 15 BH 15 reference set POL UNIT polarity unit is busy Push the Display selection key O bas O mls 4 OOOOAref DC Y SET CUR 9 LOCAL ON O 3 REMOTE O DAC current is displayed 0 0000 Bruker Biospin Page 22 Push the Display select
40. will be displayed during normal operation of the power supply whether it is a result of remote or local commands The actual value is stored for further processing The display is switched to the nominal value given in ampere EXT Read source of reference should be 0 EXT 0 Set to internal reference if not yet 0 CUR Read current CUR nn Set current to nn ampere Example O ere 7 ease SR 0 0000Aref DC SET oa e LOCAL ON O REMOTE O DC is on DAC current is 0 0000 amperes Bruker Biospin Page 16 Push the CUR key O One BEC1 PESER Intern Ref DC SET amp LOCAL oN O REMOTE O The LED on the CUR key is blinking Intern Ref is displayed Turn the encoder O Cos BROBER BEc1 7 3733Aref DC ISET cur LOCAL ON O REMOTE O Turning the analog encoder current is set to 7 3733 amperes Push the SET key O Com O eS l Int Ref set DC SET IIcuR LOCAL ON Q REMOTE O The internal reference is set Int Ref set is displayed for one second O ore a msgs 8 7 3733Aref DC SET jcuR i LOCAL ON O REMOTE O Display selection is automatically set to the nominal value of DAC current
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