SL Series User Manual Programmable DC Power Supply Higher Quality Power Processing M P E MAGNA-POWER ELECTRONICS
User Manual SL Series 1 User Manual Author Magna-Power Electronics info@magna-power.com Copyright © 2012 Magna-Power Electronics, Inc. All Rights Reserved. Magna-Power Electronics® is a registered trademark of Magna-Power Electronics, Inc. All other trademarks are the property of their respective owners. 39 Royal Road Flemington, NJ 08822 USA Phone: +1-908-237-2200 Fax: +1-908-237-2201 info@magna-power.
Preface v 1. Safety Notice .................................................................................................................. v 2. Limited Warranty ............................................................................................................. v 2.1. Claim for Damage in Shipping .............................................................................. vi 2.2. Returning Equipment ...........................................................................................
User Manual 3.4.1. Parallel Operation ............................................................................................ 3.4.2. Series Operation .............................................................................................. 3.5. Troubleshooting Guide ................................................................................................ 3.6. Calibration .................................................................................................................. 3.6.1.
Preface 1. Safety Notice Before applying power to the system, verify that the unit is configured properly for the user’s particular application. CE recognition of SL Series programmable DC power supplies is based on rack-mounted applications only. Use of these power supplies outside of a rack mount equipment enclosure will expose the user to high voltage and/or high current sources. Extreme caution must be used under these circumstances.
Preface warranty period, the repaired product will be returned at the customer's expense using the customer's requested shipping method. Damage due to corrosion, customer alterations, excessive dust, extreme environmental or electrical conditions, and/or misuse will be evaluated upon inspection. If inspection reveals that the cause of damage is not due to materials or workmanship, repair of the product will be treated on a non-warranty basis.
Document Conventions an additional digital copy of the product's Declaration of Conformity, email your product's serial number to support@magna-power.com 4. Document Conventions This user's manual uses several conventions to highlight certain words and phrases and draw attention to specific pieces of information. 1 In PDF and paper editions, this manual uses typefaces drawn from the Liberation Fonts set. The Liberation Fonts set is also used in HTML editions if the set is installed on your system.
Preface import javax.naming.InitialContext; public class ExClient { public static void main(String args[]) throws Exception { InitialContext iniCtx = new InitialContext(); Object ref = iniCtx.lookup("EchoBean"); EchoHome home = (EchoHome) ref; Echo echo = home.create(); System.out.println("Created Echo"); System.out.println("Echo.echo('Hello') = " + echo.echo("Hello")); } } Terms and definitions are highlighted as follows: Sample title for reference and definition list Sample Term Sample Definition 5.
Chapter 1. Product Information This chapter introduces the technology behind the SL Series Programmable DC Power Supply 1.1. Key Features Magna-Power Electronics SL Series combines the best of DC power processing with microprocessor embedded control. Magna-Power Electronics innovative power processing technology improves response, shrinks package size, and reduces cost. SL Series power supplies are current-fed and are more tolerant to abusive loads than conventional switching power supplies.
Chapter 1. Product Information Ethernet (+LXI), Edgeport USB (+USB). SL Series power supplies with SL Version front panels are well suited for industrial and laboratory applications. SL Series power supplies with the SL Version front panels offer an analog input to modulate the voltage or current setting using piecewise linear approximation. This feature enables the voltage or current setting to be adjusted by a sensor input, such as a thermistor, or by monitoring its own voltage or current.
Specifications The polyphase chopper produces a controlled DC bus which is connected to DC link inductors and current fed, IGBT inverter. The inverter, which operates above 20 kHz, excites the main transformer at higher than normal line frequencies. This operation produces ohmic isolation between the input and output of the power supply using a transformer of dramatically reduced size.
Chapter 1. Product Information Table 1.2. SL Series Input Specifications Input Specifications Nominal Voltage 1 phase, 2 wire + ground 85 - 265 Vac, 1Φ (UI—Universal input) (Available on 1.
Specifications Control Specifications Voltage Readback Accuracy ±0.2% of full scale voltage Current Readback Accuracy ±0.
Chapter 1. Product Information 1.4. Models Figure 1.2. SL Series model ordering guide Table 1.6, “SL Series Models” details the available standard SL Series models. The Current Maximum (Adc) column is separated by the available power levels. To determine the appropriate model, first select your output Voltage Maximum (Vdc) to find appropriate row. Next, select one desired Current Maximum from the row that contains your desired Voltage Maximum. Then, construct you model number according to the Figure 1.
Diagrams and Indicators Maximum Input Current (Aac) 380/415 Vac, 3Φ 5 8 11 440/480 Vac, 3Φ 4 6 9 1.5. Diagrams and Indicators This section provides diagrams detailing the SL Series front panel layout and physical dimensions. The definitions for the diagram references are detailed in after the diagrams. Figure 1.3. SL Version front panel layout Figure 1.4. SLC Version front panel layout Figure 1.5. SL Version front panel dimensions Figure 1.6. SL Series rear panel layout and dimensions Figure 1.
Chapter 1.
Product Options 19 37 1 2 20 1 9 5 6 1 24 12 13 1 8 1 (a) (b) (c) (d) (e) Figure 1.9. SL Series communication connections: (a) JS1, external program interface; (b) JS2, remote sense; (c) JS3, RS232; (d) JS4, IEEE-488 GPIB; and (e) JS5, LXI TCP/IP Ethernet (viewed from female end) 1.6. Product Options This sections provides details on all the available options for all Magna-Power Electronics Programmable DC Power Supply products.
Chapter 1. Product Information output capacitors. Peak currents internal to the power supply define slew rate; utilizing less capacitance enables voltage transitions in shorter time periods. Additionally, less capacitance reduces requirements for discharge demands during open circuit conditions. The standard output stage Magna-Power Electronics power supplies has been designed to provide the lowest possible output ripple voltage within the constraints of available components, size, and cost.
High Slew Rate Output (+HS) Output Voltage Range (Vdc) Output Capacitance (uF) Output Ripple (mVrms) 125 160 2000 160 160 2500 200 160 2500 250 160 3000 375 160 3000 400 160 3000 500 56 3000 600 56 3500 800 56 3500 1000 52 3500 Note: 1. For 20 to 30 kW models, multiply capacitance by 2 2. For 45 kW models, multiply capacitance by 3. 3. For 60 kW models, multiply capacitance by 4 4. For 75 kW models, multiply capacitance by 5 Table 1.9.
Chapter 1. Product Information Output Voltage Range (Vdc) Output Capacitance (uF) Output Ripple (mVrms) 400 160 5500 500 70 5500 600 60 6000 800 56 6000 1000 52 6000 1500 18 6500 2000 18 6500 3000 9 7000 4000 9 7000 Note: 1. For 20 to 30 kW models, multiply capacitance by 2 2. For 45 kW models, multiply capacitance by 3. 3. For 60 kW models, multiply capacitance by 4 4. For 75 kW models, multiply capacitance by 5 Table 1.10.
IEEE-488 GPIB Interface (+GPIB) Output Voltage Range (Vdc) Output Capacitance (uF) Output Ripple (mVrms) 1250 320 3500 1500 320 3500 2000 320 3500 3000 160 4000 4000 160 4000 Note: 1. For 500 kW models, multiply capacitance by 2 2. For 750 kW models, multiply capacitance by 3 3. For 1000 kW models, multiply capacitance by 4 1.6.3.
Chapter 1. Product Information between the UID47 and power supplies, and wiring the power supply outputs in either parallel or series. The UID47 can be used as an interface for connecting control and monitoring lines to external circuitry. It also contains an area on the printed circuit board for interconnecting wires and placing components for specific user applications.
Chapter 2. Installation 2.1. Product Inspection Carefully unpack the power supply saving all packing materials and included enclosures. Inspect power supply for possible shipping damage. Check that there are no broken knobs or connectors, the external surface is not scratched or dented, the meter faces are not damaged, and all controls move freely. Any external damage may be an indication of internal damage.
Chapter 2. Installation specified in Table 2.1, “Suggested Ampacities of Conductors as Recommended by the National Electrical Code” or Table 2.2, “Suggested Ampacities of 4-Conductor Type S or SO Cable”, with one end stripped of 1/2 inch (12.7 mm) of insulation and securely fastened to the 38660 Molex input connector at the rear of the power supply.
DC Output Connections Wire Size (AWG) Maximum Current (A) 2 80 2.4. DC Output Connections Caution: Disconnect AC power from the mains before attempting any installation procedure. DC power is wired to the power supply by attaching two cables to the output bus bars. Magna-Power Electronics recommends cables, as specified in Table 2.1, “Suggested Ampacities of Conductors as Recommended by the National Electrical Code” or Table 2.
Chapter 2. Installation Pin Definition 2 VO1REM+ Caution: Switching remote sense leads or disconnecting remote sense leads while the output is enabled can cause device failure. Only switch or disconnect remote sense leads while the power supply is in standby or turned off. Enabling remote sense activates the remote sense lead detector. The remote sense lead detector checks that the remote sense leads have been connected to the load.
Electrical Check for Models with SL Version Front Panel 2.5.1. Electrical Check for Models with SL Version Front Panel With the power supply off, disconnect the load, set voltage and current potentiometer controls fully counterclockwise, and set the over voltage trip and over current trip settings to maximum, fully clockwise. Connect the power supply to a suitable source of AC voltage. For this test, only 50% of rated AC current is required.
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Chapter 3. Operation SL Series power supplies are normally shipped with its configuration set for rotary mode (front panel) input, local sensing, internal control, and external control. This configuration is set by front panel commands described in Section 3.2.3, “Configuration Commands” or by software. With this configuration, the unit can operate in either constant voltage or a constant current output using the front panel controls.
Chapter 3. Operation There are internal capacitors across the output terminals of the power supply. These capacitors help to supply high-current pulses of short duration during constant voltage operation. Any capacitance added externally will improve the pulse current capability, but will decrease the safety provided by the constant current circuit. A high-current pulse may damage load components before the average output current is large enough to cause the constant current circuit to operate. 3.2.
Set Point Commands point. If the power supply is operating in current mode, then the actual output current will be close to the current set point and the actual output voltage will be less than the voltage set point. The TRIP DIS key displays over voltage trip and over current trip on the voltage and current display, respectively. The display reverts to displaying the actual output voltage and output current when the V/ I DIS key is released. Figure 3.1. Run Mode Commands 3.2.2.
Chapter 3. Operation Figure 3.3. Set over current trip 3.2.3. Configuration Commands To enter the configuration commands, first press the MENU key. The over voltage trip LED will initially flash. Then press the item key 2 times. The voltage display will flash conF (configure). Press the enter key to select configure commands. The REM SEN (remote sense) LED will initially flash. To choose remote sense, press the enter key or to select other configuration commands, press the item key.
Configuration Commands Figure 3.4. Enable or disable remote sense functionality Figure 3.5. Enable or disable internal control mode Figure 3.6. Enable or disable external control mode Figure 3.7. Enable or disable rotary input mode Figure 3.8.
Chapter 3. Operation Figure 3.9. Enable or disable computer input mode Figure 3.10. Enable or disable external interlock functionality 3.2.4. Calibration Commands Figure 3.11, “Front panel calibration menu” illustrates how to utilize the calibration commands using the front panel. Calibration commands allow calibration of five digital potentiometers, display of the firmware and hardware revisions, and reset the digital potentiometers to the factory calibration settings.
External 37-pin (JS1) I/O Programming and Operation Figure 3.11. Front panel calibration menu Press the item key again will advance to control potentiometer 4. The left digit of the voltage display will alternately flash P and 4, the output current will be displayed in the current display, and potentiometer, 0 to 255, will be displayed in the right three digits of the voltage display. To advance adjustment to potentiometer 5, press the item key again.
Chapter 3. Operation commands from an external digital signal. Refer to Section 3.2.1, “Run Mode Commands” for configuration from the front panel or Chapter 5, Computer Programming for configuration using software. Programming mode settings are retained after power down. 3. All analog pins must have a non-zero reference voltage applied for the unit to operate properly. Ensure that VREF EXT (Pin 3), TVREF EXT (Pin 4), IREF EXT (Pin 22), and TIREF EXT (Pin 23) are all set to a non-zero voltage.
External 37-pin I/O Pin Definitions ISO (Pin 16), CONTROL (Pin 31), ISI (Pin 35) Control references used for master/slaving only. Analog Programming (Input) The analog programming pins operate on a 0-10 Vdc scale with an input impedance of 10 kΩ. VREF EXT (Pin 3) External voltage set point reference, 0-10 Vdc, proportional to the power supply output voltage. 0 Vdc on VREF EXT is equivalent to 0 Vdc output voltage, and 10 Vdc is equivalent to 100% full scale output voltage.
Chapter 3. Operation STOP (Pin 19) Disables the power supply output. The input contactors are disengaged and the power supply will ramp down to zero voltage and current. ARM (Pin 36) Activates autosequencing through memory states. Function only available on the D Version front panel for TS Series, MS Series, and MT Series products. INTERLOCK SET (Pin 37) +5 Vdc input for interlock signal.
External Analog Programming STANDBY (Pin 28) Indication that the control circuits are powered, but the supply is disabled through the AC contactor. This is the power supply's normal off condition. To start the supply, press the start switch. To place the supply in standby, press the stop switch. PHASE LOSS (Pin 29) Indication that there's a problem with the power mains voltage. Phase loss alarm is only applicable in XR Series, TS Series, MS Series, and MT Series power supplies.
Chapter 3. Operation Table 3.2. External Programming Parameters Term Parm Description Input Range (V) Output Range 3 VREF EXT Voltage Set 0-10.0 0-100% FS Voltage 22 IREF EXT Current Set 0-10.0 0-100% FS Current 4 TVREF EXT Over Voltage Tip Set 0-10.0 0-110% FS Voltage 23 TIREF EXT Over Current Trip Set 0-10.0 0-110% FS Current Note If the applied analog input voltage exceeds 12.
External Analog Monitoring is a 10.0V precision reference, REF GND (Pin 1) is the reference ground, and VREF EXT (Pin 3) is the voltage set point input. Like front panel rotary control, the precision reference produces a voltage across the potentiometer or resistors which is then used to produce the voltage set point. Metal film resistors or a wire wound potentiometer will result in the lowest temperature coefficient.
Chapter 3. Operation TO SLAVES P/O JS1 18 CLEAR 37 INTERLOCK SET 19 STOP 17 START 26 +5 Figure 3.14. Digital input control lines Interlock set requires a either a physical short between 5.0 V (Pin 26) and INTERLOCK SET (Pin 37) of connector JS1 or application of a 5.0 V source with the positive connection at INTERLOCK SET (Pin 37) of JS1 and the negative connection at GND (Pin 7) of JS1. One of these two connections must be made to enable operation of the power supply.
Parallel and Series Operation P/O JS1 13 MONITORING LINES ALM 12 STANDBY/ALM 32 OCT 14 EXT CTL 33 INT CTL 34 OVT 8 POWER 27 PGL 9 THL 28 STANDBY 10 LOC 29 PHL 11 CUR CTL 30 VOLT CTL 7 GND Figure 3.15. Digital output contol lines Diagnostic functions include thermal overload, interlock, power, standby, phase loss, program line, over voltage, and over current. All diagnostic indicators have memory retention which saves the fault condition until the power supply is reset.
Chapter 3. Operation 3.4.1.2. Parallel Operation - Master/Slave Master/slave parallel operation permits equal current sharing under all load conditions and allows complete control of output current from one master power supply. Figure 3.16, “Master/Slave parallel connection” illustrates the terminal connection for master/slave parallel operation and salient control circuitry. The control cable can be fabricated by the user or purchased as an option, UID47, from the factory.
Series Operation CURRENT MODE CONTROL VO+ P/O JS1 16 21 4 23 3 22 2 17 19 31 ISO LOAD VO- +10 REF TVREF EXT TIREF EXT VREF EXT IREF EXT REF GND START STOP CONTROL SLAVE P/O JS1 31 35 5 12 8 24 2 TO SECOND SLAVE CONTROL VO+ ISI VO2 VO- STANDBY/ALM POWER IO2 REF GND MASTER Figure 3.16. Master/Slave parallel connection 3.4.2. Series Operation Two or more power supplies can be connected in series to obtain a total output voltage greater than that available from one power supply.
Chapter 3. Operation 3.4.2.2. Seies Operation - Master/Slave Master/slave series operation permits equal voltage sharing under all load conditions and allows complete control of output voltage from one master power supply. Figure 3.17, “Master/Slave series connection” illustrates the terminal connection for master/slave series operation and salient control circuitry. The control cable can be fabricated by the user or purchased as an option, UID47, from the factory.
Troubleshooting Guide VO+ VOLTAGE MODE CONTROL P/O JS1 21 4 23 22 3 2 17 19 VO+10 REF TVREF EXT TIREF EXT IREF EXT VREF EXT REF GND START STOP SLAVE LOAD VO+ P/O JS1 24 12 8 5 2 TO SECOND SLAVE VOIO2 STANDBY/ALM POWER VO2 REF GND MASTER Figure 3.17. Master/Slave series connection 3.5. Troubleshooting Guide The SL Series power supplies consist of a multistage power processing system.
Chapter 3. Operation 2. Over current trips and power supply cannot be reset. An auxiliary over current detector limits input DC link current. Exceeding safe levels will cause an over current diagnostic condition that cannot be reset. • Restart the supply. Transient voltages on the input voltage could have caused the problem. • Check diodes D1 through D4 on the secondary side of transformer T1. • Check for a shorted winding on transformer T1.
Driver Board current. Now set the output current to its full scale rating and measure the output current. Adjust potentiometer P3 to equally divide the error between the half scale set point and the full scale point. 3.6.2. Driver Board The driver board contains two potentiometers which are used to set under voltage and over current protection in the polyphase chopper circuitry. These potentiometer do not normally need adjustment in the field. 3.6.2.1.
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Chapter 4. Remote Interface Software The Remote Interface Software is shipped with SL Series programmable DC power supplies. The software provides the user with a quick method to operate a Magna-Power Electronics power supply under computer control. The Remote Interface Software has six windows: the Virtual Control Panel, Command Panel, Register Panel, Calibration Panel, Firmware Panel, and Modulation Panel.
Chapter 4. Remote Interface Software Figure 4.1. RIS Panel Configuration Setup Figure 4.2. LXI Communications Setup Figure 4.3.
Virtual Control Panel 4.2. Virtual Control Panel Figure 4.4, “Virtual Control Panel” illustrates the Virtual Control Panel for the D Version front panel models. Other displays are available for the SL/XR front panel and the A Version front panel. The Virtual Control Panel emulates front panel commands and provides the means to control the C Version front panel models. Figure 4.4. Virtual Control Panel 4.3. Command Panel The Command Panel is illustrated in Figure 4.5, “Command Panel”.
Chapter 4. Remote Interface Software Figure 4.5. Command Panel 4.4. Register Panel The Register Panel is illustrated in Figure 4.6, “Register Panel”. The Register Panel graphically represents the six internal registers of the power supply. Register functions, covered in the next Chapter, are briefly summarized below: • Operation Register (oper): indicates the power supply's current operational state. The register is unlatched and is described in Section 5.1.9.1, “STAT:OPER:COND?”.
Calibration Panel Figure 4.6. Register Panel As illustrated in the Register panel, each column denotes a register value, and the rows, marked by the leftmost column, are the bit positions. The get button at the column heading will acquire the respective register value for the power supply. The labels in each column indicate the meaning of each bit. For example, bit 5 in the Ques column will light if fuse alarm is activated.
Chapter 4. Remote Interface Software Figure 4.7. Calibration Panel 4.6. Firmware Panel The Firmware Panel is illustrated in Figure 4.8, “Firmware Panel”. The Firmware Panel enables the program stored internal to the power supply to be upgraded. The factory recommends that firmware upgrades be performed only if there is an operational problem with the power supply. The following steps list the procedure for upgrading the firmware: • Turn the power supply off.
Modulation Panel Figure 4.8. Firmware Panel 4.7. Modulation Panel The Modulation Panel is illustrated in Figure 4.9, “Modulation Panel”. The Modulation Panel enables a user to set and view the modulation settings as described in Section 5.1.6, “Modulation Commands”. The modulation settings consist of control input, modulation type (multiplication or addition), table row, modulation voltage input, and modulation factor.
Chapter 4. Remote Interface Software Figure 4.9.
Chapter 5. Computer Programming There is a versatile range of methods and interfaces that can be used to program the SL Series programmable DC power supply from a computer or programmable logic controller. Standard Commands for Programmable Instrumentation (SCPI) are provided for basic ASCII interfacing without any necessary drivers; these commands are documented in Section 5.1, “SCPI Commands”.
Chapter 5. Computer Programming Symbol Data Type Example(s) Expanded decimal format that includes , MIN, and MAX, where MIN and MAX are the minimim and maximum limit values in the range specification for the parameter. 326 -326.0 3.26E2 MAX Boolean data, can be numeric (0, 1) or name (OFF, ON). 1 ON String program data, enclosed in either single or double quotes. Magna-Power Electronics 5.1.2. Restricted SCPI Command Set Commands and queries described in Section 5.
Restricted SCPI Command Set SL Panel Command Type Command/Query Example Command System Command • • OUTP:PROT:CLE • • VOLT:PROT • • CURR AND CURR:TRIG CURR:PROT Status Query OUTP:STOP VOLT AND VOLT:TRIG Source SLC Panel • • • • • • Query • • • • STAT:OPER:COND? • • STAT:QUES:COND? • • SYST:VERS? • • SYST:ERR? • • • • NET:VERS? • • NET:MAC? • • NET:SER? • • TRIG Trigger INIT ABORt LXI Ethernet TCP/IP Communications NET:ADDR • • • • NET:GATE • • • •
Chapter 5. Computer Programming 5.1.3. Calibration Commands 5.1.3.1. CAL:IDN Description This command updates the power supply’s identification string for the power supply model. The CAL:IDN string can have up to 100 characters. Before this command can be used, a password must be validated by CAL:PASS. Typically, this command is for Magna-Power Electronics use only. Command Syntax CALibrate:IDN Parameters Company Name, Power Supply Model, Serial Number Examples CAL:IDN Magna-Power Electronics Inc.
Calibration Commands Query Syntax CALibrate:POT? Returned Parameter 5.1.3.4. CAL:SCAL:VOLT Description This command sets the voltage scale factor for the power supply. Command Syntax CALibrate:SCALe:VOLTage Examples CALIBRATE:SCALE:VOLTAGE 16.0 CAL:SCAL:VOLT 16.0 Query Syntax CALibrate:SCALe:VOLTage? Returned Parameter 5.1.3.5. CAL:SCAL:CURR Description This command sets the current scale factor for the power supply.
Chapter 5. Computer Programming Query Syntax CALibrate:SCALe:INPut? Returned Parameter 5.1.3.7. CAL:DEF Description This command sets the Calibration potentiometers to the factory defaults. Command Syntax CALibrate:DEFaults Examples CALibrate:DEFaults CAL:DEF 5.1.3.8. CAL:STOP Description This command terminates the calibration subsystem. Command Syntax CALibrate:STOP Examples CALibrate:STOP CAL:STOP 5.1.4. Configuration Commands 5.1.4.1.
Configuration Commands Returned Parameter 0|1 5.1.4.2. CONT:EXT Description This command enables or disables the external inputs for start, stop, arm, and clear. The query command, CONT:EXT?, returns the status of external control. Command Syntax [CONFigure]:CONTrol:EXTernal Parameters 0 | OFF 1 | ON Examples CONF:CONT:EXT ON CONT:EXT 0 Query Syntax [CONFigure]:CONTrol:EXTernal? Returned Parameter 0|1 5.1.4.3. REM:SENS Description This command sets voltage sensing to remote or local mode.
Chapter 5. Computer Programming 5.1.4.4. INTE Description This command enables or disables the external interlock feature. Interlock, described in Section 3.3.4, “Digital Input Lines”, is used for applications where the power supply needs to be disabled under external conditions. The query command, INTE?, returns the status of external interlock. Command Syntax [CONFigure]:INTErlock Parameters 0 | OFF 1 | ON Examples CONF:INTE ON INTE 0 Query Syntax [CONFigure]:INTErlock? Returned Parameter 0|1 5.1.4.5.
Measure Commands 5.1.5. Measure Commands 5.1.5.1. MEAS:VOLT? Query Syntax MEASure:VOLTage[:DC]? Examples MEAS:VOLT? MEASURE:VOLTAGE:DC? Returned Parameter 5.1.5.2. MEAS:CURR? Query Syntax MEASure:CURRent[:DC]? Examples MEAS:CURR? MEASURE:CURRENT:DC? Returned Parameter 5.1.6.
Chapter 5. Computer Programming The second command parameter, control type, defines the expression for modulating output voltage or current. With type set to 0, table data points are used in a multiplying expression. With type set to 1, table data points are used in an addition expression. The choice of using type 0 or type 1 modulation depends on the application. Only one set point can be modulated at any given time.
Modulation Commands profiles to fit their application needs, such as source emulation or output adjustments with respect to an external sensor. Modulation functionality may be used either by issuing SCPI commands as detailed in this section or by entering the values into a table from the RIS Panel software as detailed in Section 4.
Chapter 5. Computer Programming 5.1.6.3. MOD:SAVE This command copies the Active Table in RAM to a non-volatile, EEPROM memory. The Active Table, which is stored in RAM, loses its data on power down cycles. This command allows this data to be recovered at the power on cycle. Command Syntax MOD:SAVE MODulation:TABLe:SAVE Examples MOD:SAVE Related Commands MOD:TABL:LOAD 5.1.6.4. MOD:TABL:LOAD This command copies all data stored in the Cache Table to the Active Table.
Output Commands 5.1.7.2. OUTP:ARM Description This command selects between the modes of operation. There are two modes of operation for the power supply: normal mode and auto sequence mode. Normal mode energizes the current parameters of the supply until stopped. Auto sequence mode sequentially steps through the memory updating the supply’s parameters as it increments. Each memory location contains the voltage set point, current set point, over voltage trip, over current trip, and period.
Chapter 5. Computer Programming Related Commands *RST, OUTP:STOP, OUTP:ARM, PER 5.1.7.4. OUTP:STOP Description This command opens the power supply’s input contactor and initiates either normal or auto sequence mode. Command Syntax OUTP:STOP Examples OUTP:STOP OUTPUT:STOP Related Commands *RST, OUTP:START, OUTP:ARM, PER 5.1.7.5. OUTP:PROT:CLE Description This command clears the alarm latches.
Source Commands VOLT:TRIG? MAX and VOLT:TRIG? MIN return the maximum and minimum programmable triggered voltage levels. Command Syntax [SOURce]:VOLTage[:LEVel][:IMMediate][:AMPLitude] [SOURce]:VOLTage[:LEVel]:TRIGgered[:AMPLitude] Examples VOLT 200 VOLTAGE:LEVEL 200 VOLTAGE:LEVEL:IMMEDIATE:AMPLITUDE 2.
Chapter 5. Computer Programming Returned Parameter Related Commands OUTP:PROT:CLE, *RST, *SAV, *RCL 5.1.8.3. CURR and CURR:TRIG Description These commands set the immediate current level or the pending triggered current level of the power supply. The immediate level is the current programmed for the power supply output. The pending triggered level is a stored current value that is transferred to the power supply output when a trigger occurs.
Source Commands 5.1.8.4. CURR:PROT Description This command sets the over current trip (OCT) level of the power supply. If the output current exceeds the OCT level, then the power supply output is disabled and the Questionable Condition status register OC bit is set (see Table 5.6, “Bit Configuration of the Questionable Register”). An over current trip condition can be cleared with the OUTP:PROT:CLE command after the condition that caused the OCT trip is removed.
Chapter 5. Computer Programming Returned Parameter Related Commands *RST, OUTP:START, OUTP:STOP, OUTP:ARM 5.1.8.6. REC:MEM Description The recall command sets the current memory location of the power supply. In remote mode, 100 (0 - 99) memory locations are available for programming. In local mode, the 10 (0 - 9) memory locations are available for programming.
Status Commands Bit Weight Abbreviation Description 3 8 INT Internal Control 4 16 EXT External Control 5 32 WTG Interface is Waiting for Trigger 6 64 STBY Standby 7 128 PWR Power 8 256 CV Constant Voltage 9 512 RSEN Remote Sense 10 1024 CC Constant Current 11 2048 STBY/ALM Standby or Alarm NU Not Used 12-15 5.1.9.2. STAT:QUES:COND? Description This query returns the value of the Questionable Register.
Chapter 5. Computer Programming 5.1.10. System Commands 5.1.10.1. SYST:VERS? Description The SYST:VERS? query returns the firmware and hardware version of the power supply. The returned value has the form Firmware Rev. X.X, Hardware Rev. X.X. Query Syntax SYSTem:VERSion? Examples SYST:VERS? SYSTEM:VERSION? Returned Parameter 5.1.10.2. SYST:ERR? Description The SYST:ERR? query returns the error messages that have occurred in the system.
Trigger Commands Examples SYST:ERR? SYSTEM:ERROR? Returned Parameter , 5.1.11. Trigger Commands 5.1.11.1. TRIG Description This command controls remote triggering of the power supply. When the trigger subsystem is enabled, a TRIG command generates a trigger signal. The trigger signal will then initiate a pending level change as specified by CURR[:LEV]:TRIG or VOLT[:LEV]:TRIG. Afterwards, the Operation Register will be cleared.
Chapter 5. Computer Programming INITIATE:CONTINUOUS OFF Query Syntax for INIT[:IMM]: None Query Syntax for INIT:CONT: INIT:CONT? Returned Parameter 0|1 Related Commands ABOR, *RST, TRIG 5.1.11.3. ABORt Description This command cancels any trigger actions presently in process. Any pending trigger levels are reset to their immediate values. ABORt also resets the WTG bit in the Operation Register.
IEEE-488 GPIB Communications Parameter Value Stop Bits 1 Flow Control Off Cable Type Straight-through Table 5.10. RS232 Terminal Definition, Connector JS3 Pin Definition 1 NC 2 RX 3 TX 4 DTR 5 GND 6 DSR 7 RTS 8 CTS 9 NC 5.3. IEEE-488 GPIB Communications SL Series power supplies are available with an optional IEEE-488 GPIB interface. When specified at time of order, an IEEE-488 GPIB interface module is installed internally to make a second UART port available for communications.
Chapter 5. Computer Programming The IEEE-488 standard defines a method for status reporting. As illustrated in figure 4.1, the method uses the IEEE-488.1 Status Byte (STB). Three bits of this byte are defined as: Master Status Summary (MSS) Bit, Event Status Bit (ESB), and Message Available (MAV) Bit. The Master Status Summary (MSS) is an unlatched bit. When the Status Byte Register is read using a Status Byte Register query, bit 6 will be 1 if there are any conditions requiring service.
IEEE-488 GPIB SCPI Commands and Registers 6. On the menu bar, press Communicate with Instrument. The NI-488 Communicator dialog box should appear. 7. In the NI-488 Communicator dialog box, press the Configure EOS button. The Termination Method dialog box should appear. • Select the option Send EOI at end of Write. • Enter 0 into th EOS byte. • Press OK. 5.3.3. IEEE-488 GPIB SCPI Commands and Registers 5.3.3.1.
Chapter 5. Computer Programming 5.3.3.3. Clear Description This command clears all status register (ESR, STB and error queue). Command Syntax *CLS <> Related Commands *RST 5.3.3.4. Read Event Status Register Description This query reads the Event Status Register (ESR). After reading the ESR, the register is cleared. The bit configuration of the ESR is the same as the Event Status Enable Register (*ESE). The return parameter is weighted as shown in Table 5.12, “Event Status Register”.
IEEE-488 GPIB SCPI Commands and Registers Command Syntax *ESE Example *ESE 255 Query Syntax *ESE? Return Parameter Related Commands *ESR?, *STB? 5.3.3.6. Read Status Byte Register Description This query reads the Status Byte Register (STB), defined in Table 5.13, “Status Byte Register”, which contains the Master Status Summary (MSS) bit, Event Status (ESB) bit, and the Message Available (MAV) bit. Unlike reading ESR, the STB is not cleared after it is read.
Chapter 5. Computer Programming Bit. A 1 in any SRE bit position enables the corresponding Status Byte Register bit. All Status Byte Register enabled bits are then logically OR’d and placed in bit 6 of the Status Byte Register. When *SRE is cleared (by programming it with 0), the power supply cannot generate a service request to the controller. Command Syntax *SRE Example *SRE 20 Query Syntax *SRE? Return Parameter (Register value) Related Commands *ESR, *ESE Table 5.14.
IEEE-488 GPIB SCPI Commands and Registers 5.3.3.9. Save Description This command is available for all SL Series, XR Series, and TS Series, MS Series, and MT Series units with the D Version front panel. This command stores the present state of the power supply at the specified location in memory. Data can be saved in 100 memory locations.
Chapter 5. Computer Programming 5.3.3.11. Reset Description This command resets the power supply to factory default states as defined below: OUTP[:STAT] OFF CURR[:LEV][:IMM] 0 CURR[:LEV]:TRIG 0 VOLT[:LEV][:IMM] 0 VOLT[:LEV]:TRIG 0 PER 0 INIT:CONT OFF VOLT:PROT[:LEV] 110% of MAX CURR:PROT[:LEV] 110% of MAX *RST also forces an ABORt command. Command Syntax *RST <> 5.4. LXI TCP/IP Ethernet Communications SL Series power supplies are available with an optional LXI TCP/IP Ethernet interface.
Connectivity and IP Address Negotiation Pin Definition 8 NC Ethernet communications can be made though the Remote Interface Software, a terminal emulation programs like Microsoft Windows (tm) HyperTerminal Program, 3rd party software, or through a computer’s web page browser.
Chapter 5. Computer Programming 5.4.2. LXI TCP/IP Ethernet Control and Discovery Methods The Ethernet module supports the VXI-11 discovery protocol allowing the device to be discovered on the network by software such as National Instruments' Measurement and Automation Explorer, Agilent Connection Expert, or the Remote Interface Software supplied with the power supply. 5.4.2.1.
LXI TCP/IP Ethernet Control and Discovery Methods already. To authenticate, enter admin for the username and leave the password field blank. The power supply’s control panel will be displayed. The screen displays the same status information as the front panel of the power supply and allows the user to control and read voltage, current, over voltage trip, over current trip, mode of operation, and diagnostics. Like the front panel, a diagnostic condition can be cleared using the clear button.
Chapter 5. Computer Programming Figure 5.2.
LXI TCP/IP Ethernet Control and Discovery Methods Figure 5.3. Web interface control panel 5.4.2.3. Discovery using NI Measurement and Automation Explorer To access discovery with NI Measurement and Automation Explorer, the NI-VISA add-on module must be installed along with the standard software package. Start NI Measurement and Automation Explorer, right-click on Devices and Interfaces, and then select "Create New…" Select "VISA TCP/ IP Resource" from the list.
Chapter 5. Computer Programming 2. Insert the recorded IP address in the "Host address" text box and port number in the "Port number" text box. 3. Click the "OK" button. 4. Set the following properties for HyperTerminal's ASCII setup: • Send line ends with line feeds. • Echo typed characters locally. • Append line feeds to incoming line ends. 5. Type "*IDN?" in the input window and press enter. The identification of the instrument should appear. 5.4.3. LXI TCP/IP Ethernet SCPI Commands 5.4.3.1.
LXI TCP/IP Ethernet SCPI Commands 5.4.3.3. NET:SER? Description This command sets the serial number of the Ethernet module. The serial number is an integer ranging from 1 to 16777215 and cannot be altered by the user. Query Syntax [SYSTem][:COMMunicate]:NETwork:SER? Examples SYST:COMM:NET:SER? NET:SER? Returned Parameter 5.4.3.4. NET:ADDR Description This command sets the static address of the Ethernet module of the power supply. The factory default address setting is 192.168.1.100.
Chapter 5. Computer Programming Query Syntax [SYSTem][:COMMunicate]:NETwork:GATE? Returned Parameter Related Commands NET:MAC, NET: ADDR, NET:SUBN, NET:PORT, NET:HOST, NET:DHCP 5.4.3.6. NET:SUBN Description This command sets the subnet IP Mask address of the Ethernet module of the power supply. The factory subnet mask setting is 255.255.255.0.
USB Communications Related Commands NET:MAC, NET: ADDR, NET:GATE, NET:SUBN, NET:HOST, NET:DHCP 5.4.3.8. NET:HOST? Description This query reads the host name of the Ethernet communications module. Query Syntax [SYSTem][:COMMunicate]:NETwork:HOSTname? Examples SYST:COMM:NET:HOST? NET:HOST? Returned Parameter Related Commands NET:MAC, NET: ADDR, NET:SUBN, NET:PORT, NET:DHCP 5.4.3.9. NET:DHCP Description This command sets the DHCP operating mode of the Ethernet module.
Chapter 5. Computer Programming The USB Edgeport/1 Windows drivers, included on the Magna-Power Electronics CD that ships with the power supply, installs a virtual RS232 COM port in the Device Manager of the operating system. This in turn will allow communications with the SL Series power supply in the same manner as a device connected to the RS232 COM port on a PC. The USB port becomes transparent to the serial device and the software running on the PC. 5.5.1.
485DSS Initial Setup Parameter Value Stop Bits 1 Flow Control Off Cable Type Straight-through A command is required to address each individual 485DSS module. Once addressed, the module will transparently convert serial data. The address command can only be transmitted at 9600 baud, and if the command is transmitted at any other baud rate, the command will be ignored by the 485DSS module.
Chapter 5. Computer Programming 5. Establish RS232 communications by configuring the power supply for remote operation using the front panel commands described in Section 3.2.3, “Configuration Commands”. 5.7. IVI-COM Driver Magna-Power Electronics IVI-COM driver handles the low-level bus protocols, simplifying automation development. It supports TCP/IP, IEEE-488 GPIB and RS232 using standard VISA resource descriptors.
Chapter 6. Applications SL Series power supplies deploy several powerful programming functions that enhance performance for key user specific applications. While the possibilities are endless, a few examples are presented in this chapter to demonstrate the internal capabilities of the power supply. All of these examples can be further expanded by operating the unit under computer control.
Chapter 6. Applications Memory Voltage Set (Vdc) Current Set (Adc) Over Voltage Trip (Vdc) Over Current Trip (Adc) Period (s) 7 35 200 55 220 10 8 40 200 55 220 10 9 40 200 55 220 9998 6.2. Leadless Remote Sensing Remote sensing is used to improve the degradation of regulation which will occur at the load when the voltage drop in the connecting wires is appreciable. Remote sensing, as described in Section 2.4.
Battery Charger of a Photovoltaic Array (Control Type 0)” defines the associated piece-wise linear modulation table to emulate that array. For this example, a Magna-Power Electronics power supply rated for 125 Vdc and 53 Adc peak output was chosen for the power source. More advanced functionality and automated programming and sequencing is available using Magna-Power Electronics Photovoltaic Power Profile Emulation software. Figure 6.3. IV characteristics for a typical photovoltaic array Table 6.3.
Chapter 6. Applications be applied across the battery terminals to compensate for the diode drop. By setting the voltage and current to the bulk charge voltage and maximum charge current, the power supply will initially charge the batteries in current mode control and then automatically crossover to voltage mode control when the batteries reach the desired set point.
Battery Charger Parameter Step 1: Bulk Charge Step 2: Absorption Charge Step 3: Equalization Charge Step 4: Float Charge Voltage Set Vbc Vbc Vec Vfc Current Set Imbc Imbc Imec Imec OVT 105% Vbc 105% Vbc 105% Vec 105% Vfc OCT 110% Imbc 110% Imbc 110% Imec 110% Imec Period 6 hours 6 hours 1 hour Mode of Control Current Voltage Current/Voltage Voltage Notes: Vbc: Bulk charge voltage; Vec: Equalize charge voltage; Vfc: Float charge voltage; Imbc: Maximum bulk charge current (25
Chapter 6. Applications Electrolyte Temperature (°F) Electrolyte Temperature (°C) Deviation in Charge voltage (Vdc) +/- Range 120 48.9 - .112 - .132 130 54.4 - .140 - .165 140 60.0 - .168 - .198 150 65.6 - .196 - .231 160 71.1 - .224 - .264 Deviation is 2.80 to 3.30 mV/°F/cell Table 6.7. Modulation Table for a Temperature Compensated Battery Charger (Control Type 1) Row VMOD (Vdc) Mod(VMOD) Vo (Vdc) 1 0.000 0.73 16.10 2 0.636 0.73 16.10 3 0.858 -0.73 13.18 4 10.
Constant Power Operation Io Mod 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 Mod 150 135 120 105 90 75 60 45 30 15 0 10 20 30 40 50 60 70 80 90 100 Io (Adc) Piecewise linear approximation makes a continuous curve by interpolating points on the curve between those programmed. For example, Vo is 77.5 Vdc if the operating current is 48.85 Adc. For nonlinear curves, accuracy of the approximation improves with more data points. Vo (Vdc) Figure 6.5.
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Where to Buy Magna-Power Electronics Partners and Sales Offices North America Magna-Power Electronics, Inc. 39 Royal Road Flemington, NJ 08822 United States of America Germany, Austria, Switzerland, Central and Eastern Europe Magna-Power Electronics GmbH Daimlerstr. 13 85521 Ottobrunn Germany Phone: 1-908-237-2200 Email: info@magna-power.com www.magna-power.com Phone: +49-(0)89-95890293 Email: info@magna-power.de www.magna-power.de Distributors of Magna-Power Electronics products are located worldwide.
