Lakeshore 620 User's Manual

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[Page 1] Lakeshore 620

Rev. 1.2 P/N 119-001 9 April 1999 Power Faul t Persistent Switch Heater Magnet Power Supply 7 L o ca l E s c 9 8 7 L o c a l E s c 9 8 4 R e m o t e 6 5 1 3 2 0 Enter +/- . Function Menu Next Menu Normal Display Cursor ...

[Page 2] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual A LIMITED WARRANTY Lake Shore Cryotronics, Inc. (henceforth Lake Shore), the manufacturer, warrants the instrument to be free from defects in material and workmanship fo...

[Page 3] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Table of Contents i TABLE OF CONTENTS Chapter/Paragraph Title Page List of Illustrations ...............................................................................

[Page 4] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual ii Table of Contents TABLE OF CONTENTS (Continued) Chapter/Paragraph Title Page 3.3 Normal Display for Manual Mode ....................................................

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Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Table of Contents iii TABLE OF CONTENTS (Continued) Chapter/Paragraph Title Page 5 ERROR MESSAGES AND TROUBLESHOOTING .................................................

[Page 6] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual iv Table of Contents LIST OF ILLUSTRATIONS Figure No. Title Page 1-1 Four-Quadrant Power ..............................................................................

[Page 7] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Forward v FOREWORD PURPOSE AND SCOPE This manual contains user instructions for the Model 620/622/623/647 Magnet Power Supply (MPS). Lake Shore Cryotronics, Inc. design...

[Page 8] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Forward vi Identification of Electrostatic Discharge Sensitive Components Below are various industry symbols used to label components as ESDS: HANDLING ELECTROSTATIC DI...

[Page 9] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Forward vii BEFORE YOU OPERATE THE EQUIPMENT Train personnel in proper emergency measures such as electrical power shut off, fire department notification, fire extinguis...

[Page 10] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Forward viii SAFETY SYMBOLS Direct current (power line). Alternating current (power line). Alternating or direct current (power line). Three-phase alternating ...

[Page 11] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Introduction 1-1 CHAPTER 1 INTRODUCTION 1.0 GENERAL This chapter covers Features (Paragraph 1.1), Specifications (Paragraph 1.2), and Operating Characteristics (Paragr...

[Page 12] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Introduction 1-2 1.2 SPECIFICATIONS Below are performance specifications for current with a 1 Henry load and voltage with a resistive load. DC Output: True, Four-Quadran...

[Page 13] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Introduction 1-3 Front Panel: Contains a menu driven keyboard and graphic display for entry and display of results. Operating parameters to set and monitor from the front pan...

[Page 14] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Introduction 1-4 Table 1-4. Model 647 DC Output Specifications SPECIFICATION CURRENT VOLTAGE Digital Programming Resolution: Standard/High 10 mA / 1 mA 10 mV / 1 mV ...

[Page 15] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Introduction 1-5 Conventional MPS: Consists of a unipolar power supply with an energy absorber to dissipate magnet energy during discharge. The energy absorber prevents rever...

[Page 16] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Introduction 1-6 1.3.3 Highly Efficient, Air Cooled, Compact Unit Lake Shore MPS: Quiet switched-mode design. The output uses a proprietary pulse width modulated techniqu...

[Page 17] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Setup & Connections 2-1 CHAPTER 2 INITIAL SETUP AND CONNECTIONS 2.1 INSPECTING AND UNPACKING The MPS ships in a special cardboard box with integrated forklift skid...

[Page 18] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Setup & Connections 2-2 2.4.1 Power and Ground Requirements The AC power source for the MPS should be frequency and voltage regulated and isolated from sources that m...

[Page 19] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Setup & Connections 2-3 Use this procedure to connect input power to the MPS: 1. Loosen the two connector cover screws and open the cover. 2. Slip the strain relief ov...

[Page 20] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Setup & Connections 2-4 2.5.2 Shielding, Grounding, and Noise For noise reduction, tightly twist and shield the leads from the MPS to the magnet. Connect the shield to...

[Page 21] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Setup & Connections 2-5 2.5.6 MPS Analog Current And Voltage Monitoring Connections The MPS provides amplified and buffered current and voltage monitor output signals ...

[Page 22] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Setup & Connections 2-6 NOTE: The MPS includes a protection circuit which reduces the effect of open sense leads during remote voltage sensing operation. If the +S lead...

[Page 23] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Setup & Connections 2-7 c. Locate Communications Microprocessor (CMP) in the MPS rear panel. The CMP is the module with two RJ-11 telephone jacks. Loosen two screws secu...

[Page 24] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Setup & Connections 2-8 1 2 3 4 5 6 7 8 9 101112131415161718 + - + - + - OVP Im Vm mVp +Vs -ls lp +ls -S +S CAL AND ID V l MODE INT Vl EXT RI FLT ON WARNING: NO USE...

[Page 25] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Setup & Connections 2-9 2.7 POST-INSTALLATION INSTRUCTIONS The MPS is electrically and mechanically inspected and operationally tested prior to shipment. It should be da...

[Page 26] Lakeshore 620

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Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Operation 3-1 CHAPTER 3 OPERATION 3.0 GENERAL This chapter covers seven areas: MPS Front Panel (Paragraph 3.1), Power Up (Paragraph 3.2), Setting Current on an MPS wit...

[Page 28] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Operation 3-2 3.2 POWER UP Read and follow instructions in Paragraphs 2.1 - 2.4.3 and the Forward safety recommendations before applying power to the MPS. Do not connect t...

[Page 29] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Operation 3-3 The magnet manufacturer supplies the inductance of the magnet, maximum ramp voltage, and maximum current ramp rate. The relationship for these parameters is giv...

[Page 30] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Operation 3-4 MGT END: 0 to ±50.000 A (620), 0 to ±125.000 A (622), 0 to ±155.000 A (623), 0 to ±72.000 A (647) Magnet End Current. The desired magnet current. To set a...

[Page 31] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Operation 3-5 3.6 FUNCTION MENUS The MPS uses a system of three Function Menus for setup. Function Menus 1 and 2 do not require a PSH Option Card, but the presence of one ch...

[Page 32] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Operation 3-6 3.6.1.3 Step Limit/Zero Screen Press the Function Menu key to display Function Menu 1. Press the STEP LIMIT/ZERO Function Key to display the Step Limit/Zer...

[Page 33] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Operation 3-7 IMAX SET: 0.00 A to +50.00 A (620), +125.00 A (622), +155.00 A (623), or +72.00 A (647) Current Maximum Setting. MPS current cannot exceed this setting. The sof...

[Page 34] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Operation 3-8 3.6.2.1 Outputs Only Screen Press the OUTPUT ONLY Function key to display a screen with output values in larger characters for remote viewing. There are tw...

[Page 35] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Operation 3-9 3.6.3.2 DELAY SETUP SCREEN WITH DITHERING To access the dithering feature, turn ON (up position) switch 5 of the rear panel CAL AND ID DIP switches. Select D...

[Page 36] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Operation 3-10 2. Enter these parameters in the Automatic Mode Screen: MAG START: Magnet Start Current (only if LAST END is unknown). For this example, we assume an init...

[Page 37] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Operation 3-11 3.9 DITHERING IN AUTOMATIC MODE Dithering is a means of arriving at the magnet current by executing excursions around the final current which decay to zero i...

[Page 38] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Operation 3-12 This Page Intentionally Left Blank. ...

[Page 39] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Remote Operation 4-1 CHAPTER 4 REMOTE OPERATION 4.0. GENERAL Either of two computer interfaces on the optional 6224 card permit remote MPS operation: the IEEE-488 Interf...

[Page 40] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Remote Operation 4-2 4.1.2 IEEE-488 Command Structure The Model 622/623 supports several command types. There are three groups of commands: 1. Bus Control – see Paragr...

[Page 41] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Remote Operation 4-3 4.1.3.1 Status Byte and Service Request Enable Registers The Status Byte Register consists of a single data byte containing seven bits of MPS status inf...

[Page 42] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Remote Operation 4-4 The Standard Event Status Enable Register enables any of the Standard Event Status Register reports. The Standard Event Status Enable command (*ESE) se...

[Page 43] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Remote Operation 4-5 4.1.5 Notes On Using the IEEE Interface • The term "free field" indicates a floating decimal point that may be placed any appropriate place...

[Page 44] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Remote Operation 4-6 National Instruments GPIB0 Configuration GPIB-PC2/2A Ver 2.1 Primary GPIB Address ..................→0 ↑ Select the primary GPIB address by ...

[Page 45] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Remote Operation 4-7 4.2 SERIAL I/O INTERFACE RS-232C is a standard of the Electronics Industries Association (EIA) and one of the most common interfaces between a computer...

[Page 46] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Remote Operation 4-8 4.2.1 Serial Interface Hardware Configuration Below is a technical description of the 6224 option card for the Serial Interface configuration. (Note: ...

[Page 47] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Remote Operation 4-9 4.2.4 Notes On Using The Serial Interface • To chain commands together, insert a semi-colon (;) between them. Multiple queries cannot be chained. �...

[Page 48] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Remote Operation 4-10 4.3 SUMMARY OF IEEE-488/SERIAL INTERFACE COMMANDS Below is an alphabetical list of IEEE-488/Serial Interface commands consisting of Operational Comma...

[Page 49] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Remote Operation 4-11 4.3.1 Operational Commands Description Below is a list of MPS Operational Commands which configure the various functions. ERR? Error Status Query ...

[Page 50] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Remote Operation 4-12 OVP? Overvoltage (Quench) Protection Circuit Status Query Input: OVP? Returned: 0 if the circuit is inactive, or 1 if it is active. Remarks: On...

[Page 51] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Remote Operation 4-13 4.3.2 Interface Commands Description The MPS Interface Commands below help configure IEEE-488 interface compatibility for a variety of computer equipm...

[Page 52] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Remote Operation 4-14 4.3.3 Ramping Commands Description The following MPS Ramping Commands configure the various functions of the ramping features. RAMP Programs Ramp...

[Page 53] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Remote Operation 4-15 4.3.4 Current Zero Commands Description The following MPS commands configure the various functions of the current zero features. IMODE? Current Pro...

[Page 54] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Remote Operation 4-16 4.3.5 Current Step Limit Commands Description The following MPS commands configure the various functions of the current step limit features. ISTP ...

[Page 55] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Remote Operation 4-17 4.3.6 Computed Field Commands Description The MPS can also display Computed Field rather than current. This is useful with Superconducting magnets bec...

[Page 56] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Remote Operation 4-18 4.3.7 Common Commands Description The MPS Common Commands below are input/output commands defined by the IEEE-488 standard and shared with other ins...

[Page 57] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Remote Operation 4-19 *IDN? Identification Query Input: *IDN? Returned: Manufacturer, Model Number, Model Serial Number, Firmware Date. Remarks: Returns seventeen cha...

[Page 58] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Remote Operation 4-20 *SRE Enables Status Reports In The Service Request Enable Register Input: *SRE [bit weighting] where [bit weighting] = the sum (000 to 255) of bit...

[Page 59] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Error Messages & Troubleshooting 5-1 CHAPTER 5 ERROR MESSAGES AND TROUBLESHOOTING 5.0 GENERAL This chapter covers Software Error Messages (Paragraph 5.1), Factory Def...

[Page 60] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Error Messages & Troubleshooting 5-2 No delay is allowed (CAL AND ID switch 7 OFF, down) and multiple MPS operation (CAL AND ID switch 4 ON, up) must be selected. Afte...

[Page 61] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Error Messages & Troubleshooting 5-3 High AC (HI AC) Detected Any time the AC line rises above 120% of the nominal line selected, the MPS turns off the front panel circ...

[Page 62] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Error Messages & Troubleshooting 5-4 5.2 Factory Default Settings Below is a list of factory-presets. To reinitialize the MPS to factory presets at any time, hold the ...

[Page 63] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Error Messages & Troubleshooting 5-5 5.3 CALIBRATION NOTE: Calibration is only as accurate as the current monitor shunt. The factory uses a current monitor shunt rated a...

[Page 64] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual 5-6 Error Messages & Troubleshooting 17. Send IZER to force output current to 0 amps. Verify a DVM reading of 0V ±0.01V. Allow MPS output to settle for 2 minutes. 18. ...

[Page 65] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Error Messages & Troubleshooting 5-7 Output Voltage Verification 5. From the MPS front panel, select the Instrument Setup (INSTR. SETUP) menu and change compliance volt...

[Page 66] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual 5-8 Error Messages & Troubleshooting 5.5 REAR PANEL CONNECTOR DETAIL Figure 5-1 MPS Rear Panel Connectors 123456789101112131415161718 + - + - + - OVP Im Vm m Vp +Vs ...

[Page 67] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Error Messages & Troubleshooting 5-9 5.6 IEEE-488 INTERFACE CONNECTOR (WHEN MODEL 6224 OPTION IS PRESENT) Connect to rear MPS IEEE-488 Interface connector with cables ...

[Page 68] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual 5-10 Error Messages & Troubleshooting 5.7 SERIAL INTERFACE CABLE AND ADAPTERS To aid in Serial Interface troubleshooting, the figures below provide wiring information...

[Page 69] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Options & Accessories 6-1 CHAPTER 6 OPTIONS AND ACCESSORIES 6.0 GENERAL This chapter covers MPS options and accessories: Model 6224 IEEE-488/Serial Interface installa...

[Page 70] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Options & Accessories 6-2 Below are specifications for the Model 6226/6476 Liquid Helium Level and Gaussmeter Input Card: Liquid Helium Level: Probe Type: NbTi Superco...

[Page 71] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Options & Accessories 6-3 Locate the probe in a cavity that is 0.003 inch wider and 0.01 inch longer than the substrate, and with a depth the same or slightly greater tha...

[Page 72] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Options & Accessories 6-4 6.2.5 LHe Level Access liquid helium level and field monitoring from the MPS front panel. Press Function Menu and then Next Menu to display ...

[Page 73] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Options & Accessories 6-5 6.2.5.2 Field Probe Setting and Calibration Press Function Menu and then Next Menu to display Function Menu 2. Press the FIELD Function key t...

[Page 74] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Options & Accessories 6-6 Look up the R REF /R (T) in Table 6-2 at the temperature of the sensor during measurement. Use the equation: Ω L effective R L R R T active...

[Page 75] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Options & Accessories 6-7 IBS? Magnetic Field Summary Query Input: IBS? Returned: [IOUT], [BFLD], [STB] Remarks: Returns 23 characters plus up to two terminators....

[Page 76] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Options & Accessories 6-8 LUNI? LHe Level Units Query Input: LUNI? Returned: % for percentage, E for English units (inches), or M for metric units (centimeters) R...

[Page 77] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Options & Accessories 6-9 6.3 MODEL 6228 AND 6228-8MUX PERSISTENT SWITCH HEATER OUTPUT The Model 6228 Persistent Switch Heater (PSH) Output Option provides a variable 0-...

[Page 78] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Options & Accessories 6-10 When PSH is ON, the MPS compares the present current setting with the current setting stored when PSH was OFF. If the two do not match, the ...

[Page 79] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Options & Accessories 6-11 3. The selected current multiplied by the heater resistance (e = i × r) must be less than 15 Vdc for the MPS to accurately determine complian...

[Page 80] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Options & Accessories 6-12 PSHS? PSH Summary Query Input: PSHS? Returned: [PSH][PSH status][PSH compliance][current value][command status] where: [PSH] = 0 if P...

[Page 81] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Options & Accessories 6-13 6.4.1 Model 6228-2 Remote Operation Commands IPSHB Program PSH Current Input: IPSHB [current] where [current] = a value from 0 to 125 mA ...

[Page 82] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Options & Accessories 6-14 6.5 ACCESSORIES Accessories are devices that perform a secondary duty as an aid or refinement to the primary unit. Below are MPS accessories...

[Page 83] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Magnetic Units A-1 APPENDIX A UNITS FOR MAGNETIC PROPERTIES Conversion from CGS to SI Units Quantity Symbol Gaussian & CGS emu a Conversion Factor, C b SI &a...

[Page 84] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Magnetic Units A-2 This Page Intentionally Left Blank ...

[Page 85] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Mainframe Control Bus Operation B-1 APPENDIX B MAINFRAME CONTROL BUS OPERATION B1.0 GENERAL There are seven elements to the Model 622/623 Mainframe Control Bus operating ...

[Page 86] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Mainframe Control Bus Operation B-2 B4.0 CONTROL BUS SERIAL INTERFACE CONFIGURATION Configure the control bus serial interface for either RS-232C or RS-485 communications ...

[Page 87] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Mainframe Control Bus Operation B-3 B6.0 CONTROL BUS SERIAL INTERFACE OPERATION The host computer initiates the serial interface link and transmits either a command or a que...

[Page 88] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Mainframe Control Bus Operation B-4 B7.0 CONTROL BUS SERIAL INTERFACE SAMPLE PROGRAM The following PC program is an interactive program that prompts the user for a Mainfra...

[Page 89] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Mainframe Control Bus Operation B-5 Table B-1 MPS Mainframe Control Bus Remote Command Summary Input Command Query Function *CLS – Clear all pending status. *ESE *...

[Page 90] Lakeshore 620

Lake Shore Model 620/622/623/647 Magnet Power Supply User’s Manual Mainframe Control Bus Operation B-6 Table B-2 Additional MPS Mainframe Control Bus Remote Commands Input Command Query Function – ADR Mainframe address. Multidrop a...