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USER MANUAL

1. IMAX 0x0A34 2 W R f Current maximum register double type UMAX Ox0A36 2 W R Voltage maximum register double type PMAX Ox0A38 2 W R Power maximum register double type ILCAL Ox0A3A 2 W R Calibration current low end target value double type IHCAL Ox0A3C 2 W R Bu Current high end calibration target value double type ULCAL OxOA3E 2 W R Waff Voltage low end calibration target value double type UHCAL Ox0A40 2 W R N Voltage high end calibration target value double type TAGSCAL Ox0A42 1 W R GN Calibration state tag u16 type U 0x0B00 2 R Voltage Register double type 0x0B02 2 R Current Register double type SETMODE 0x0B04 1 R Operation Mode register u16e type INPUTMODE 0x0B05 1 R Input Status Register u16 type MODEL OxOBO6 1 R Model Register u16 type EDITION 0x0B07 1 R software version number register u16 type 4 8 8 The Definition Of The Command Register CMD 39 Definition CMD Value Description CC 1 CV 2 CW 3 CR 4 CC Soft Start 20 Dynamic Mode 25 Short Circuit Mode 26 List Mode 27 CC Loading And Unloading Mode 30 CV Loading And Unloading Mode 31 CW Loading And Unloading 32 Mode CR Loading And Unloading Mode 33 CC Mode Switch To CV Mode 34 CR Mode Switch To CV Mode 36 Battery Test Mode 38 CV Soft Start 39 Changin System Parameters 41 YO IE ENTERPRISE CORP LTD Input O
2. Preset UFIX Double Optional Multi Registers Preset CMD 2 mandatory Multi Registers Table 10 CW mode operation Operation Register Value Description Preset PFIX Double Optional Multi Registers Preset CMD 3 mandatory Multi Registers Table 11 CR mode operation Operation Register Value Description Preset RFIX Double Optional Multi Registers Preset CMD 4 mandatory Multi Registers Table 12 CC mode soft start Operation Register Value Description Preset IFIX Double Optional Multi Registers Preset TMCCS Double Optional Multi Registers Preset CMD 20 mandatory Multi Registers Table 13 CV mode soft start Operation Register Value Description Preset UFIX Double Optional Multi Registers Preset TMCVS Double Optional Multi Registers Preset CMD 39 mandatory Multi Registers Table 14 CC loading and unloading mode Operation Register Value Description Preset IFIX Double Optional Multi Registers Preset UCCONSET Double Optional Multi Registers Preset UCCOFFSET Double Optional Multi Registers Preset CMD 30 mandatory 41 YO IE ENTERPRISE CORP LTD Multi Registers Table 15 CV loading and unloading mode Operation Register Value Description Preset UFIX Double Optional Multi Registers Preset UCVONSET Double Optional Multi Registers Pre
3. The following shows wiring diagram for the remote sensing Wiring diagram for remote sense 4 7 Battery Testing Experiment proves the test with load is the best method to ensure the battery whether work well or not Only with the correct load testing the battery can be confirmed if it was being the expectant life curve location The YI 6611 electronic loads can be used to test any type of the battery nowadays As to any battery used either in sheltered equipment or in the uninterrupted service system it is necessary to use the load testing Because the battery is the lowest reliable component it must be tested by the load periodically to ensure the reliability of the battery Capability Test Constant current mode is applied in YI 6611 Serial electronic load to test the capability A program is set to control voltage level When the voltage of the battery is too low the electronic load will identify the battery being on the threshold value set or at the margin of insecure state and will stop testing automatically When the load is in testing procedure you can see the battery voltage battery discharge current electronic load 31 YO IE ENTERPRISE CORP LTD power and battery capability that has been spared Ifthe load is connected with PC software then you can see the discharge curve of battery discharge This test can test out the reliability and remaining life of battery So it is very necessary to do the test before
4. o e II AN MIN e e CAT I 8 ERR LUTO dl Il pan 090010960111116029 La Picture 3 3 Rear Panel of Yl 66 Series Load 1 O full range current in correspond to 0 10V output Oscillograph can be connected by here to observe dynamic waveforms Remote sense terminals S S and trigger input output terminal GND terminal Multifunctional communication connector for RS232 RS485 USB It is 9 Pin serial port interface connector and utilizes 5 volt TTL logic signals Do not connect an YI 131 cable with standard RS 232 voltages on the cables connectors Doing so may damage the instrument and is not covered by WARRANTY 3 4 Standard Display The standard display of the instrument as below measured output voltage value measured output current value atus of the setup values Je Vw measured output power value setting values for the current voltage power 3 5 Keypad Directions 1 _9 0 9 numeric keys Esc Esc key can be exited from any working condition Switch to CC mode YO IE ENTERPRISE CORP LTD Setting up a constant current Switch to CV mode Setting up a constant voltage P Set Switch to CW mode Setting up a constant power R Set Switch to CR mode Setting up a constant resistance Multi purpose Used together with multifunction key to perform diversity functions and applications for example shift Menu can perform menu function Turn on off Load
5. Increasing setup values A kd decreasing setup values E Confirm key 3 6 Menu Operation Press the key Shift Menu to access to the menu function and the VFD display screen shows the menu items Select the menu items by pressing the A and Y keys or by rotating the knob and then press the key Enter to enter in the menu item you wanted Or you can press the key Esc to return to the last menu MENU CONFIG INPUT RECALL Setting the output to the same state at last time when the load is turned off or to the OFF state when the electronic load supplier is powered on ON Setting the same state as last time you turned off the eletronic load OFF Setting the output to OFF state when the electronic load is powered on The load will work at CC mode KEY SOUND SET Setting the key sound ON The buzzer will sound when any key was pressed OFF the buzzer will not sound when any key was pressed CONNECT MODE Connect mode MAXTIDLEXING Multi SEPARATE Single YO IE ENTERPRISE CORP LTD BAUDRATE SET Setting the Baudrate 2400 9600 14400 28800 57600 115200 COMM PARITY Setting Comm Parity mode NONE None Parity EVEN Even Parity ODD Odd Parity ADDRESS SET Setting Address 1 200 The address is the input number
6. Prompting Messenges Explanation TRIGGER WHEN PASS Trigger once when pass the test TRIGGER WHEN FAIL Trigger once when failing the test TRIGGER WHEN TEST END Trigger once when finishing the test TRIGGER DISABLE Trigger disabled Meanwhile the Load will display the following trigger output electrical feature Display Description OUTPUT LEVEL When there is a trigger output the voltage level will change from low to high till a key pressed or a trigger input signal arrive the voltage level will sink to low status OUTPUT PLUSE When there is trigger output the voltage level change from low to high status 5 seconds later it will sink to low automatically 26 YO IE ENTERPRISE CORP LTD 4 2 8 3 Executing Automatic Test Function Press the key Shift 0 to enter into the menu configuration and then press the A and W keys to get the item MENU AUTO TEST followed by pressing the Enter key to confirm Then press the A and Y keys to get the item LOAD AUTO TEST followed by pressing the Enter key to confirm Then press the A and Y keys to select the sequential code defined as the automatic test function you want to execute followed by pressing the Enter key to confirm Then the upper right corner of the VFD display shows AUT n meaning the n automatic test list will be initiated The bottom right of the VFD If users have prepared all things well press the key On Off to initiate the auto
7. YO IE ENTERPRISE CORP LTD 8NC 9NC The output of DB9 interface on the rear panel of the power supplier is TTL voltage level so the voltage level shift cable YI 131 or YI 133 must be applied before connecting the DB9 interface with the serial interface on PC Y1 131 Voltage Level Shift Cable PC 204 Zz CO CC CH GC Z Voltage Level Shift Cable 1 Z 4 E 7 Note Itwill not work if you connect the DB9 interface connector of the electronic load to the RS232 interface connector of computer directly by a standard RS232 cable Please use IT YI 131 or YI 133 to connect them 46 YO IE ENTERPRISE CORP LTD Quick Reference Safety Please donot install any spare or repair the instrument without permission In order to make sure the normal work of the instrument please have it mended in the maintenance department designated by our company Pease review the following safety precautions before operating our equipment Safety Symbols Please keep in mind the following items which may result in injuries on your body D Connect it to safety earth ground using the wire recommended in the user manual AN High voltage danger Non professionals are forbidden to open the instrument N The symbol on an instrument indicates that the user should refer to the operating Instructions located in the manual please wear gloves when you start to opreate and be ware of electronic shock Don t use the equipment at
8. 0 1 FS 1 0 1 FS 1 0 1 FS 1 0 1 FS 0 1 0 1 FS 0 1 0 1 FS 0 1 0 1 FS 0 1 0 1 FS CW Mode Range 0 300W 0 300W 0 300W Voltage and current input Resolution 10mW ImW 10mW value gt 10 full measument Accuracy 1 0 1 FS 1 0 1 FS 1 0 1 FS 1 0 1 FS 0 1 0 1 FS 0 1 0 1 FS 1 0 1 FS 0 1 0 1 FS Voltage 19 999V 150V 19 999V 150V 0 19 999V 0 500V 19 999V 0 150V V Measurement Resolution ImV 10mV ImV 10mV ImV 10mV ImV 10mV Accuracy 015 0 03 FS 015 0 03 FS 015 0 02 FS 015 0 03 FS 0 015 0 03 FS 0 015 0 05 FS 015 0 03 FS 0 015 0 03 FS Current 0 15A 6A 0 60A tee Resolution 0 ImA ImA ImA Accuracy 03 0 05 FS 03 0 08 FS 03 0 05 FS 03 0 08 FS 0 03 0 05 FS 0 03 0 08 FS 03 0 05 FS 0 03 0 08 FS W Measurement Watt 100W 150W 100W UMW 100W 300W 100W 300W Voltage and current input Resolution ImW 10mW ImW mW ImW 10mW ImW 10mW value 210 full measument Accuracy 0 1 0 1 FS 0 1 0 1 FS 0 1 0 1 FS 1 0 1 FS 0 19 0 1 FS 0 19 0 1 FS 0 1 0 1 FS 0 1 0 1 FS Battery Measruement Battery Input 0 5 120V Max Measurement Capacity 999 H Resolution 0 1mA Time Range 1S 16HS Dynamic Measurement Transition List 0 25kHZ 2 5A uS T1 amp T2 60uS 999S Accuracy 15 offset 10 FS CC soft startup Time 1 mS 2 mS 5mS 10m 20 mS 50 mS 100 mS 200 mS Accuracy 15 offset 10 FS Current CC Short Circuit VOC y Resistance C A R 25m 2 Operating Temperature Nonoperating 10C 70 Dimension W H D mm YO IE E
9. 1 200 KEY LOCK SET Setting the keyboard unlocking password when it is 0 or null there is no password set EXIT SYSTEM SET MAX CURRENT SET Setting the maximum current If the maximum current is higher than 3A it is high range Otherwise it is low range MAX VOLTAGE SET Setting the maximum Voltage If the maximum voltage is higher than 20V it is high range Otherwise it is low range MAX POWER SET Setup the Maximum Power TERMINAL SEL Choosing the input terminal FRONT Choose the input terminal at the front panel BACK Choose the input terminal at the back panel EXIT LIST LOAD LIST Choose list files 1 8 EDIT LIST Edit list files MINIMUM TIME Edit minimum time 0 02 1310 7mS LIST MODE LIST output mode CONTINUOUS Continuous mode END HOLD Remains to the last output voltage level after the whole steps are executed successfully END RESET Keep load off state after the whole steps are executed successfully STEP LENGTH Step length 1 200 YO IE ENTERPRISE CORP LTD STEP n 1 whole step length CURRENT Set current TIME Duration EXIT AUTO TEST LOAD AUTO TEST Choose automatic test files 1 8 EDIT AUTO TEST Edit automatic test files STEP LENGTH Set the whole step length STEP n WORK MODE LOAD OFF MODE Load off mode CC MODE Constant current mode CV M
10. 10 47 63 Hz Operating Temperature 0 40 C Storage temperature 20 C 70 C YO IE ENTERPRISE CORP LTD Chapter 3 Quick Reference 3 1 Power on self test Verify that you have received the following items with your electronic load If anything is missing contact your nearest Sales Office One power cord for your location The user manual One CD only when you have bought communication accessories One communication cable only when you have bought communication accessories First please make sure the electronic load has been correctly connected and powered on Please refer to the following for the detailed operation steps Procedure Display Explanation 1 Power on the SYSTEM SELF TEST The electronic load start power on self test electronic load Vxxx and the VFD display shows the software serial No 2 Wait for 1s after EPROM ERROR EEPROM damage or lost data of last power turn on electronic load off ERROR CAL DATA EEPROM lost calibration data 3 Wait for another 2S xx XXXXXXX A Display the actual input voltage and current once ERROR XXXXXXXW XXXXXXXX value actual power value and setting value occurred 3 2 In Case of Trouble If the electronic load fails to run during power on operation the following test will help you to solve the problems that might be encountered 1 Make sure if you have connected the power properly and On Off switch
11. 4 2 7 2 Executing List Function ooooooocccnnnooccccononccncoconnnononnncnnnnnnnnnnnnnnnnnnnnnn nn n nn nn EESE EE Ener Enere Eneee Eet 24 4 2 8 Automatic Testing Function nn 25 4 2 8 1 Automatic Test Operation 25 4 2 8 2 Setting up Automatic Test Trigger Output Mode 26 4 2 8 3 Executing Automatic Test Funchon ern enn 27 lee e pee eee lla 27 4 3 1 Short Circuit Operation GHORT ern nn 27 4 32 INPC On OTt Operation a la lt et lh rll salad lta 27 4 4 Electronic Load Operation Range 28 4 5 Protection Funchons nn 28 4 5 1 Over Voltage Protection CV 28 4 5 2 Over Gurrent Protecti n OG 4 2 222 2 Eden 29 4 5 3 Over Power Protection CW 29 4 5 4 Input Polarity Reversed nn 29 4 5 5 Over Heat Protection OH ci a 30 4 6 Remofe Sense F UNCON ii a A EE a 30 4 7 Battery Testing cccccccccccceeeececeececeeeeeseeaeeeeeceaaeeeesecaeeeecaeaeeeeceeaeecesgecaeeeesaceeeesgcieeeeeseaaesessscaeeeessesees 31 4 8 Communication Protocol cccccceeeccceeeececeeeeecceeeeececaeeeeceaeeeescceeeeesecaeeeeseceeeesecceeeeeseceeeessuueeeessneees 32 4 81 a tee Tee EE 32 e Setup Baudrate tan data ra ar Ha Ha Ha eat it 33 E Dalar EE 33 4 94 FUNCUON Godella 33 4 8 9 Error checking CRC ansieht EI bb DD 34 4 8 6 Complete Command Frame Anahysie ernennen 34 4 8 7 Coil with the Register Address Allocation 37 4 8 8 The Definition Of The Command Register CMD 39 4 8 9 Common Operation Function Description ern nn 40 S
12. Shift 5 CR CV the load will back into the standard constant resistance mode 4 1 3 Constant Voltage Operation Mode CV In this mode the electronic load will attempt to sink enough current to control the source voltage to the programmed value Please refer to the picture 4 7 Note When the voltage of the measured power supplier is lessen than the voltage value set or the maximum input current is beyond the maxim current that the load can absorb the load couldn t control the voltage to the value set Load input Volt Set Voltage gt Load current I Picture4 7 Constant Voltage Mode 4 1 3 1 Setting up a Standard Constant Voltage Mode Press the key V SET then the VFD display will s ow STANDARD VOLT xxxxxxxxV indicating the current constant voltage value Then Press the numeric keys and decimal point key to enter the constant voltage value required followed by pressing the key Enter In this way the load will enter into the standard constant voltage mode If the input state is in OFF state then the right upper corner of the VFD display will show the word OFF Press the key On Off to change the input state into ON state Then the right upper corner of the VFD display will show the word CV or Unreg Showing CV means the load has been successfully set into the expected constant voltage value showing Unreg means the load couldn t adjust itself to the expected constant voltage value Please check if the measured power sup
13. automatic testing function those sequential code defined as the automatic testing function will be automatically shielded when choosing the sequential codes which are defined as list function 24 YO IE ENTERPRISE CORP LTD 4 2 8 Automatic Testing Function The electronic load is available of automatic testing function 8 sets of data can be edited at most and 50 steps can be edited in each set of data Each step can be edited as the following six working mode load off mode constant current mode constant voltage mode constant power mode constant resistance mode short circuit mode and can be edited as the following four types current comparison voltage comparison power comparison and resistance comparison Besides the delay time of each step can also be edited The delay time of each step ranges from 0 1 25 5S considering the quickness and accuracy When automatic test is over the electronic load will indicate if it passes the test or failed If it fails the electronic load will sound alarm Meanwhile the electronic load can be triggered by front panel and TRIGGE IN hardware voltage level in the back panel and can output the trigger voltage level from the TRIGER OUT terminals on back panel You can setup it as the voltage level trigger mode or pulse trigger mode and can have 4 selections of Pass trigger failure trigger finish trigger and disabled trigger 4 2 8 1 Automatic Test Operation 1 Press the key Shift 0 to enter into the
14. current waveform monitor terminal output terminal Supports remote voltage compensation and multi data storage Power on self test software calibration and standard rack mountable Edits arbitrary waveforms in list function Available with RS232 RS485 USB serial interfaces YO IE ENTERPRISE CORP LTD Chapter 2 Technical Specifications 2 1 Main Technical Specifications We are available of many models of electronic loads Please refer to the following table for the parameters of 150W 300W DC electronic load MODEL YI 6611 YI 6612 YI 6612B YI 6612C Power 150W 300W 300W 300W Input Raitng Current 0 30A 0 30A 0 15A 0 60A Voltage 0 150V 0 500V 0 150V Range 3A 30A 0 3A 0 15A 6A 0 60A CC Mode Resolution mA ImA 0 ImA ImA ImA ImA Accuracy 03 0 05 FS 03 0 05 FS 03 0 05 FS 03 0 05 FS 0 03 0 05 FS 0 03 0 05 FS 03 0 05 FS 0 03 0 05 FS Range 1 19 999V 1 150V 1 19 999V 1 150V 0 1 19 999V 0 1 500V 1 19 999V 0 1 150V one Rein S i S iv S Accuracy 03 0 02 FS 03 0 02 FS 03 0 02 FS 03 0 02 FS 0 03 0 02 FS 0 03 0 02 FS 03 0 02 FS 0 03 0 02 FS CR Mode Range 032 10K 030 10K 039 5K 0 39 10K 0 30 5K 039 10K 0 032 5K Voltage and current input Resolution 16bit 16bit 16bit 16bit 16bit 16bit 16bit 16bit value 210 full measument Accuracy 1
15. menu configuration and then press the A and W keys to get the item MENU AUTO TEST followed by pressing the Enter key to confirm Then press the A and Y keys to get the item EDIT AUTO TEST followed by pressing the Enter key to confirm Then press the A and Y keys to select the sequential code that need to be set followed by pressing the Enter key to confirm 2 When the VFD display shows STEP LENG XX indicating the step length that requires to be set Then press the numeric keys to input the step length you want to set followed by pressing the key Enter to confirm Please note that the step length should be the round numbers of 1 50 3 When the VFD display shows STEP 1 xxxxx MODE indicating the working mode selected in the step 1 press the A and Y keys to select one mode from him following six working modes followed by pressing the key Enter to confirm Working Prompting Explanation Mode Messenges Load Off LOAD OFF MODE Compare the voltages when in load off mode Mode CC Mode CC MODE Choose one of four types current comparison voltage comparison power comparison and resistance comparison CV Mode CV MODE Choose one of four types current comparison voltage comparison power comparison and resistance comparison CP Mode CP MODE Choose one of four types current comparison voltage comparison power comparison and resistance comparison CR Mode CR MODE Choose one of four types current compa
16. power value set resistance value set in working mode Press the numeric keys to enter the value followed by pressing the key Enter to confirm If in step 3 you choose load off mode or short circuit mode then the electronic load will skip step 6 7 When the VFD display shows MINIMUM xxxx xxxxxx indicating the lower limit of valid comparison press numeric keys to input the value followed by pressing the key Enter to confirm When the VFD display shows MAXIMUM xxxx xxxxxx indicating the upper limit of valid comparison press numeric keys to input the value followed by pressing the key Enter to confirm If all the steps set have been edited the VFD display will show EDIT AUTO TEST meaning exit back to the automatic testing function If all the steps set have not been edited the VFD display will show STEP n xxxxx MODE indicating that data of the N step is being edited 4 2 8 2 Setting up Automatic Test Trigger Output Mode Press the key Shift 0 to enter into the menu configuration and then press the A and W keys to get the item MENU AUTO TEST followed by pressing the Enter key to confirm Then press the A and Y keys to get the item SETUP AUTO TEST followed by pressing the Enter key to confirm The load will enter into the automatic test trigger output mode There are the following 4 types of trigger output modes Please press the A and Y keys to select one you wanted followed by pressing the key Enter to confirm
17. 1 TM xxxxx mS indicating the current duration in the first step press the numeric keys to input the current duration you want to set in the first step followed by pressing the key Enter to confirm 5 If all the steps set have been edited the VFD display will show EDIT LIST meaning exit back to the list function If all the steps set have not been edited the VFD display will show STEP n CURR xxxxxA indicating that data of the N step is being edited Please finish it according to the operation instruction in last step step 4 6 Since list function shares the same storage space with automatic testing function please make sure that the sequential code that you selected in the list function is the same with that in automatic testing function If the sequential code which was defined as automatic testing function before now is defined as list function the automatic testing function of this sequential code will be deleted and cannot be restored 4 2 7 2 Executing List Function Press the key Shift 0 to enter into menu configuration and then press the A and W keys to get the item MENU LIS followed by pressing the key Enter to confirm Then press the A and Y keys to get the item LOAD LIST followed by pressing the Enter key to confirm Then press the A and Y keys to select the sequential code defined as list function you want to execute followed by pressing the Enter key to confirm Since the list function shares the same storage space with
18. IA Double Optional Multi Registers Preset IB Double Optional Multi Registers Preset TMAWD Double Optional Multi Registers Preset TMBWD Double Optional Multi Registers Preset TMTRANRIS Double Optional Multi Registers Preset TMTRANFAL Double Optional Multi Registers Preset MODETRAN 0 2 Optional Multi Registers Preset CMD 25 mandatory Multi Registers Table 22 System parameter setting mode Operation Register Value Description Preset IMAX Double Optional Multi Registers Preset UMAX Double Optional Multi Registers Preset PMAX Double Optional Multi Registers Force Single Coil REMOTE OxFF00 0x0000 Optional 43 YO IE ENTERPRISE CORP LTD Preset Multi Registers CMD 41 mandatory 4 9 Remote operation The DB9 interface connector on the rear panel of the power supplier can be transferred to RS232 interface through the voltage level shift cable YI 131 or YI 133 the following information will tell you how to use the computer to control the output of the power supplier Before carrying out the remote operation mode please use the voltage level shift cable YI 131 or YI 133 provided by our company for YI 131 or YI 133 can not only transform TTL voltage level into RS232 signal but also connect the DB9 interface connector with computer s serial interface 4 9 1 YI 131 or YI 133 Communication Cable The DB9 interface connector on the rear panel of electronic load is TTL volta
19. N 42 Input OFF 43 4 8 9 Common Operation Function Description Table 1 Remote Control Operation Table 3 Table 5 Table 6 Table 7 Table 8 Table 9 Operation Register Value Description Force Single Coil PC1 1 mandatory Table 2 cancels remote control operation Operation Register Value Description Force Single Coil PC1 0 mandatory Local Prohibition control operations Operation Register Value Description Force Single Coil PC2 1 mandatory Table 4 Local allows the operator to Operation Register Value Description Force Single Coil PC2 0 mandatory Input ON operation Operation Register Value Description Preset CMD 42 mandatory Multi Registers Input OFF operation Operation Register Value Description Preset CMD 43 mandatory Multi Registers Short circuit operation Operation Register Value Description Preset CMD 26 mandatory Multi Registers CC mode operation Operation Register Value Description Preset IFIX Double Optional Multi Registers Preset CMD 1 mandatory Multi Registers CV mode operation Operation Register Value Description 40 YO IE ENTERPRISE CORP LTD
20. NTERPRISE CORP LTD 300W Curren CC Mode Voltage and current input alue 210 full measument Accuracy 0 1 0 1 FS 0 1 0 1 FS OW Mode alue 210 full measument Accuracy 0 1 0 1 FS 0 1 0 1 FS W Measurement alue 210 full measument Accuracy _0 0 158 010 18 Battery Measurement Battery Input 0 5 120V Max Measurement Capacity 999 H Resolution 0 1mA Time Range 1S 16HS Dynamic Measurement Transition List 0 25kHZ 2 5A uS T1 amp T2 60uS 999S Accuracy 15 offset 10 FS CC soft startup Time 1 mS 2 mS 5mS 10mS 20 mS 50 mS 100 mS 200 mS Accuracy 15 offset 10 FS Resistance CR 280mN 0400 Temperature Nonoperating 10 C 70 C W H D mm 108 214 365 we Ir lo Note The specification are subject to change without notice please visit our website www yoie com tw for the updated information YO IE ENTERPRISE CORP LTD 2 2 Electronic Load Dimension Dimension of the models YI 6611 YI 6612 YI 6612B YI 6612C and YI 6612B30 214mm H x 108mm H x 365mm D These models are provided with a carrying handle The handle can be removed if desired y y Ee eoj anna 2 3 Environmental Conditions The instrument is intended for the indoor use in a pollution degree 2 environment Operating environmental limits are as follows Parameter Specification Humidity 70 relative humidity non condensing Altitude 2000 m 220AV 10 47 63 Hz AC Line Voltage 110AV
21. ODE Constant voltage mode CP MODE Constant power mode CR MODE Constant resistance mode SHORT MODE Short circuit mode TEST MODE Qualification testing mode TEST CURRENT Test current TEST VOLTAGE Test voltage TEST POWER Test power TEST RESI Test resistance DELAY TIME Test delay time 0 2 25 5S INPUT xxxx Input the parameters set for example CC mode 1A MINIMUM xxxx Input the minimum lower limit MAXIMUM xxxx Input the maximum upper limit SETUP AUTO TEST TRIGGER Trigger output selection WHEN PASS Trigger once when passing the test WHEN FAIL Trigger once when failing the test WHEN TEST END Trigger output is initiated when test ends DISABLE Disable trigger output OUTPUT Output electrical characteristics selection PULSE Pulse output LEVEL Voltage level output EXIT EXIT 10 YO IE ENTERPRISE CORP LTD Chapter 4 Panel Operation 4 1 Basic Operation Mode Four operation modes are avaliable for YI 66 series electronic loads 1 Constant current CC 2 Constant voltage CV 3 Constant resistance CR 4 Constant power CW 5 Constant Current Shifting into Constant Voltage Mode CC CV 6 Constant Resistance Shifting into Constant Voltage Mode CR CV 4 1 1 Constant Current Operation Mode CC In this mode the electronic load will sink a current in accordance with the programmed value regardless of the input voltage Please refer to the picture 4 1 If maximum current value of the measured power supply is lesse
22. ORY 0x0512 1 R 1 input state memory VOICEEN 0x0513 1 R 1 key sound ON OFF CONNECT 0x0514 1 R 1 multi O single ATEST 0x0515 1 R 1 Automatic test mode ATESTUN 0x0516 1 R 1 Automatic test pattern waiting to trigger ATESTPASS 0x0517 1 R 1 success automatic test success 0 automatic test failed IOVER 0x0520 1 R 1 over current tag UOVER 0x0521 1 R 1 over voltage tag POVER 0x0522 1 R 1 over Power tag HEAT 0x0523 1 R 1 over heat tag REVERSE 0x0524 1 R 1 reverse tag UNREG 0x0525 1 R 1 register parameter failed tag ERREP 0x0526 1 R 1 EPPROM error tag ERRCAL 0x0527 1 R 1 calibration data error tag Table 2 Register XRAM area definition Name Address Bit Property Description CMD Ox0A00 1 W R Command Register lower 8 bits effective high 8 bits meaningless IFIX Ox0A01 2 W R Constant current register double type UFIX Ox0A03 2 W R Constant voltage register double type PFIX Ox0A05 2 W R Constant power register double type RFIX 0x0A07 2 W R Constant resistance register double type 37 YO IE ENTERPRISE CORP LTD TMCCS 0x0A09 WIR Current soft start rising time register double type TMCVS 0x0A0B W R Voltage soft start rising time register double type UCCONSET Ox0A0D W R Constant current load voltage register double type UCCOFFSET Ox0AOF W R constant curre
23. R ee e Lt EE 44 4 9 1 YI 131 or YI 133 Communication Cabie nenn 44 4 9 2 Communication between Power Supply and PC 45 W lle RETSrENCE EE 47 YO IE ENTERPRISE CORP LTD Chapter 1 Overview The YI 66XX series programmable DC electronic load is a new generation product from YO IE ENTERPRISE CORP LTD Incorporating high performance chips the YI 66XX series delivers high speed and high accuracy with a resolution of 0 1 mV and 0 01 mA basic accuracy is 0 03 and basic current rise speed is 2 5 A us YI 66XX series has wide application from production lines for cell phone chargers cell phone batteries electronic vehicle batteries switching power supplies linear power supplies and LED drivers to research institute automotive electronic aeronautic and astronautic maritime solar cell and fuel cell etc test and measurement applications FEATURES Six high speed operation modes CC CR CV CW CC CV CR CV Over current over voltage over power over heating and polarity reversal protection High luminance vacuum fluorescent display VFD screen with two line four channel display Intelligent fan system will automatically activate based on changing ambient temperatures Soft start time setting activating the power supply in accordance with the set voltage value Battery test and short circuit test functions Capable of rising edge and falling edge dynamic testing Supporting external trigger on either input or output External
24. YO IE ENTERPRISE CORP LTD USER MANUAL Models YI 66 Series Programmable DC Electronic Load Including YI 6611 YI 6612 YI 6612B YI 6612C YI 6612B30 BSERERMATRRAT YO IE ENTERPRISE CORP LTD Tel 886 2 7746 3368 E mail sales yoie com tw Fax 886 2 2557 7497 Web www yoie com tw E SA ERAS Add 2F No 61 Ningxia Rd Datong Dist Taipei City 103 Taiwan R O C YO IE ENTERPRISE CORP LTD Content USER MANUAL ccoo o e EHER DB BEN ob eed eed i Chapter 1 Overview trett rAEEEE EASE EEEAEEEEEEEEEEEEEEEEEESEEEEEAEEEEEESEEEEEEEEEEESEEEEEEEE EE EEEE EEEE 1 Chapter 2 Technical Gpechftcatons neat atea aaa iaaa A a aaa a nn nnnenn 2 2 1 Main Technical Gpechficatons nner 2 2 2 Electronic Load Dimension kiiin raora raria erie irrien 4 2 3Environmental Tue Ire A Chapter 3 Quick Reierence ooooooccociccoccccccococcccononnnnnonnnnnncnnnn nn nn nen R RR RR RR RAR RR RR nnnnnnnnnnannnnnnianenmnninns 5 3 1 Power on SelfteESt is sana e E de a AO 5 332 1H se of Trouble stats tato dan tt nt Dr o Sas at 5 3 3 Front Panel Operaton mnnon aaar en ET EEEE AAPEEE EETRI REEERE EAE EE EEEE EEEE 6 3 4 Stand rd Display ill las 7 3 5 Keypad Directions a nterne 7 3 0 Menu Operation dd OS 8 Chapter 4 Panel Operaton innir en a a E e a ES 11 4 1 Basic Operation Mode s sies a ee NEE EEA 11 4 1 1 Constant Current Operation Mode CC 11 4 1 1 1 Setting up a Standard Constant Current Mode en 11 4 1 1 2 Loading and Unloading Constant Curr
25. alue A set Press the numeric keys and decimal point key to enter the lasting time required followed by pressing the key Enter to confirm Then the load VFD display shows RISING TM xxxxxxxxmsS indicating the current rising time set from value A to value B Press the numeric keys and decimal point key to enter the rising time required followed by pressing the key Enter to confirm Then the load VFD display shows LEVEL B CURR xxxxxxxxA indicating the current value B set Press the numeric keys and decimal point key to enter the current value required followed by pressing the key Enter to confirm Then the load VFD display shows WIDTH B TM xxxxxxxxmS indicating the current lasting time of current value B set Press the numeric keys and decimal point key to enter the lasting time required followed by pressing the key Enter to confirm Then the load VFD display shows FALLING TM xxxxxxxxmsS indicating the current falling time set from value B to value A Press the numeric keys and decimal point key to enter the falling time required followed by pressing the key Enter to confirm Then the load VFD display shows TRANMODE CONTINUOUS TRANMODE PULSE TRNMODE TRIGGER indicating the current dynamic testing operation mode Press the key Aor V to choose the dynamic testing operation mode you want followed by pressing the key Enter to confirm 22 YO IE ENTERPRISE CORP LTD 4 2 5 Waveform Control 4 2 5 1 Square Wave When the rise t
26. ating anti clockwise is to decrease the value Note if the constant current value you want to set is beyond the maximum constant current value of the load the current value will stop to be increased even if you still rotate the selective encoder knob clockwise Then the right lower corner of the VFD display shows the constant current value you set among which a cursor shows under one number meaning this number requires fine tuning If users want to change the fine tuning accuracy just press the rotary encoder knob in which a key is included Every time when you press the rotary encoder once the cursor will move forward to the previous number 4 1 1 2 Loading and Unloading Constant Current Mode Loading and unloading mode can well protect the measured power supplier from damage When the voltage of the measured power supplier begins to increase the load will automatically adjust itself to the open circuit state and begin to carry the measured power supplier and adjust itself to the current value set only when the voltage of the measured power supplier has been increased to the ONSET loading voltage When the voltage of the measured power supplier begins to decrease and has been decreased to the OFFSET unloading value the load will automatically adjust itself to the open circuit state If the ONSET loading voltage value is higher than the OFFSET unloading voltage value the load can be avoided from frequent carrying and unloading at the critical
27. ation mode is set as pulse mode or trigger mode the trigger control is initiated There are three trigger modes ay Keypad triggering mode Press the key Shift Trigger to p trigger the electronic load b TTL triggering mode Send a high pulse with a constant time more than 5m Sec to the trigger In terminals in rear panel to trigger the electronic load Cy PC control software triggering mode 4 2 7 List Function The electronic load is available of list operation function 8 sets of data can be edited at most and 200 steps can be edited in each set of data Users can edit the duration of each step the minimum time of each set of data Please note that the minimum time should be the round numbers of 0 02mS and ranges from 0 02mS to 1310 7mS The duration of each step has something to do with the minimum time you set If the minimum time is set as 0 02mS then the duration of each step ranges from 0 02mS t01310 7mS if the minimum time is set as 2mS then the duration of each step ranges from 2mS to 131070mS 23 YO IE ENTERPRISE CORP LTD 4 2 7 1 List Operation 1 Press the key Shift 0 to enter into the menu operation and then press the A and Y keys to get the item MENU LIST followed by pressing the Enter key to confirm Then press the A and Y keys to get the item EDIT LIST followed by pressing the Enter key to confirm Then press the A and Y keys to select the sequential code that need to be set followed by pressing the Enter key to conf
28. b Make bitxor for the first byte of the frame date and the lower 8 bit of the CRC register And save the bitxor result into the CRC register c Right move CRC register for 1 byte and check the if the lowest bit is 1 if the lowest bit is 1 and then make the bitxor for the CRC register and the fixed data OxA001 d Repeat c for 8 times e Repeat step b c d for the next byte of frame data till the last byte f The last number in the CRC register is the last parity checking result Put it at the end of the frame data and keep the lower 8 bit in the after and higher 8 bit in former 4 8 6 Complete Command Frame Analysis 1 Read Coil Status 0x01 Read Coil Status Example Query Field Name Byte length Example Value Slave Address 1 1 200 Function Code 1 0x01 Starting Address 2 O OxFFFF NO of Points 2 1 16 CRC Error Check 2 Read Coil Status Example Normal Response Filed Name Byte length Example Value Slave Address 1 1 200 Function Code 1 0x01 Byte Count 1 1 2 Data Coil Status n CRC Error Check 2 Read Coil Status Example Abnormal Response Field Name Byte length Example Value Slave Address 1 1 200 Function Code 1 0x81 Abnormal Code 1 01 04 CRC Error Check N For example The following example reads the load input state ISTATE of Coil at slave device address 0x01 From table 4 8 7 1 we know that the ISTATE addre
29. e could be selected as 2400 9600 14400 28800 57600 115200 1 Setup additional address and communication parameter The additional address is a single byte with 16 hexadecimal system data YI 66 series electronic loads will only response the request data frame which has the same additional address 2 Setup the additional address Press Shift 0 in turn Enter into the Main Menu the Load will display as MENU CONFIG Press the key Enter to confirm then the load get into CONFIG Menu press A and Y key button to let the load display CONFIG ADDRESS SET then press Enter to confirm the load will display ADDRESS ADDR xxx you can change the address number by press the numeric keys and press the key Enter again to confirm Note The valid additional address number is integers in the range of 1 200 3 Select the check mode Press Shift 0 in turn enter into the main Menu the load will display MENU CONFIG press the key Enter to confirm the load will get into CONFIG menu press A and Y key button to let the load display CONFIG COMM PARITY press Enter to confirm then the load will display COMM PAR xxxxx you can select the parity check mode by pressing A and Y key button and then press Enter to confirm 4 8 2 Setup Baudrate Press Shift 0 in turn the load will display MENU CONFIG Press Enter to confirm the load will enter into CONFIG menu press A and Y key button to let the load display CONFIG BAUDRATE SET press Enter to confirm the load
30. ent Mode nennen 12 4 1 1 3 Soft Start Constant Current Mode nennen 13 4 1 1 4 Constant Current Shifting into Constant Voltage Mode 14 4 1 2 Constant Resistant Operation Mode CH 14 4 1 2 1 Setting up a Standard Constant Resistance Mode nennen 15 4 1 2 2 Loading and Unloading Constant Resistance Mode 15 4 1 2 3 Constant Resistance Shifting into Constant Voltage Mode oooooooococinnnccccnnnoccccnoconnccnonnnnnno 16 4 1 3 Constant Voltage Operation Mode CH 17 4 1 3 1 Setting up a Standard Constant Voltage Mode nn 17 4 1 3 2 Loading and Unloading Constant Voltage Mode 18 4 1 3 3 Soft Start Constant Voltage Mode nennen 18 4 1 4 Constant Power Operation Mode CW 19 4 1 4 1 Setting up a Standard Constant Power Mode nn 19 4 1 4 2 Loading and Unloading Constant Power Mode 20 4 2 Dynamic Testing Operation ern EEEE EErEE 21 4 2 1 Continuous Mode CONTINUOUIE nn 21 4 2 2 P lse Mode MESSE u 2 ats iin bi 21 4 2 3 Trigger Mode TRIGGER 444444444400 nnnnnnnnnnnennnnnnnnnonnnnnnnnnnnnnnnnnnnenennnn nn 21 4 2 4 Setting up Dynamic testing operation Parameters nenn 22 4 2 5 Vaveform Be te DE 23 4 2 5 1 Square WaVe sun nue nM ie MMM MM lees ieee eben ee EL HE 23 42 52 Trlangular Wave Areale 23 4 2 5 3 Trapezoidal Wave nn nn nine nn nn nan nn nn nan nn nn rin n nn EEEE EEEE EEEa 23 4 2 6 Trigger Genre cocina titi 23 AO A e DIDI DI 23 YO IE ENTERPRISE CORP LTD 4 27 12 EiSt Operations ni eet ee dekh be ae ee oe eM ead he det 24
31. ge level you can use the communication cable YI 131 or YI 133 to connect the DB9 interface connector of the electronic load and the RS 232 interface connector of computer for the communication Please refer to the following picture for YI 131 or YI 133 Picture4 9 1 YI 131 44 YO IE ENTERPRISE CORP LTD Picture4 9 2 YI 133 Note It will not work if you connect the DB9 interface connector of the electronic load to the RS232 interface connector of computer directly by a standard RS232 cable Please use IT YI 131 to connect them 4 9 2 Communication between Power Supply and PC The DB9 interface connector on the rear panel of the electronic load can be transferred to RS232 interface through the voltage level shift cable Yl 131 or YI 133 The following instructions can help you understand how to control the output of power supplier by PC 1 RS232 Setting Before using the remote operation mode please make sure that the baudrate and communication address in power supplier are the same as that in the computer software otherwise the communication will fail You can change the baud rate and communication address from the front panel or from computer 1 Baud rate 9600 4800 9600 19200 38400 which are selectable from the menu on the front panel 2 Data bit 8 3 Stop bit 1 4 Parity none even odd 2 DB9 Serial Interface DB9 Serial Interface 1 5V 2 TXD 3 RXD 4NC 5 GND 6 NC 7NC 45
32. has been pressed 2 Check the power voltage setting There are two voltages which can make load work 110V or 220V Please make sure you get the right voltage in accordance to the voltage in your area 3 Check the fuse of the load YO IE ENTERPRISE CORP LTD If fuse is blowout please change another fuse with the following specification Model Fuse specification Fuse specification 110VAC 220VAC Y1 6611 T0 5A 250V TO 3A 250V Y1 6612 T0 5A 250V TO 3A 250V Y1 6612B T0 5A 250V T0 3A 250V Y1 6612C T0 5A 250V TO 3A 250V YI 6612B30 T0 5A 250V TO 3A 250V 4 Replace the fuse Open the plastic cover in the rear panel of the electronic load with a flat screwdriver see the table 3 1 Then replace the blowout fuse with a new one PA E a mem i a E EEE o e Wa ehn oo om CE CAT H Picture 3 1 Fuse Location 3 3 Front Panel Operation Please refer to the picture3 2 for the front panel of YI 66 electronic load 1504 1150 oc ELECTRONIC LOAD Picture 3 2 Front Panel The upper half is black VFD display screen 2 Robtary knob Turn to adjust the setting values YO IE ENTERPRISE CORP LTD 3 Numeric keys 0 9 ESC key secondary key functions 4 Keypad set up the current voltage power resistance modes Scroll through menus and options 6 Input terminals Power switch to turn on off the instrument CO Up Down keys Enter key t
33. he input state is in OFF state then the right upper corner of the VFD display will show the word OFF Press the key On Off to change the input state into ON state Then the right upper corner of the VFD display will show the word CW_UN or Unreg Showing CW_UN means the load has been successfully set into the expected constant power value showing Unreg means the load couldn t adjust itself to the expected constant power value Please check if the measured power supplier has been correctly connected and turned on make sure if the voltage is normal and if the output current of the measured power supplier is in the range of the current that the expected power can absorb In loading and unloading constant power mode press the key Shift 1 V_Level the load will back into the standard constant power mode 20 YO IE ENTERPRISE CORP LTD 4 2 Dynamic Testing Operation Dynamic testing operation enables the electronic load to periodically switch between two load levels This function can be used to test the transient characteristics of the measured power supplier Dynamic testing operation can be turned on and off by pressing the key C Sit _Tran_ at the front panel Before you turn on dynamic testing operation you should set all of the parameters associated with dynamic testing operation by pressing the key _Shift S Tran including Value A A pulse time Rising time from value A to value B Value B B p
34. he maximum current value of YI 6611 electronic load is 30A When it is beyond 30A it will be automatically adjusted to 30A Besides the maximum current value has close relation with the current resolution If the maximum current value is or is below 3A the load current resolution will be 0 01mA If the maximum current value is beyond 3A then the load current resolution will be only 0 1mA 4 5 3 Over Power Protection OW When input power exceeds the power limit buzzer will sound and VFD display will show OVER POW Users need to press any key to get the load work normally Note if the current input state is in OFF state you need to press the key ON OFF to make the load work normally If the over power problem is not solved the load will shows OVER POW again The load maximum power value can be set by pressing the key Shift 0 Menu When the VFD display shows MENU SYSTEM SET press the key Enter to confirm Then the VFD display shows SYSTEM IMAX xxxxxxxxA Press the Up and Down keys to make adjustment until the VFD display shows SYSTEM PMAX xxxxxxxxW indicating the current maximum power value then enter the maximum power value required by pressing the numeric keys and decimal point key followed by pressing the key Enter to confirm Then press the key Esc to escape the Menu item Note The maximum power value of YI 6611 electronic load is 300W When it is beyond 300W it will be automatically adjusted to 300W 4 5 4 Input Polarity Reve
35. ime and falling time are both set as zero and the dynamic testing operation mode is set as continuous mode the output wave is square wave The output frequency is the inverse of the lasting time sum of current A and current B Since the minimum accuracy of all the time is set as 20uS the load can read the square wave with the maximum frequency of 25KHz and duty cycle of 50 4 2 5 2 Triangular Wave When the lasting time of both current A and current B are set as zero and the dynamic testing operation mode is continuous mode the output wave is triangular wave The output frequency is the inverse of the sum of the rising time and falling time Since the minimum accuracy of all the time is set as 20uS the load can read the triangular wave with the maximum frequency of 25KHz Since the rising edge and falling edge of the triangular wave are all step wave with 20uS output frequency the ideal degree of triangular wave is in inverse proportion to the its output frequency In extreme situations the triangular wave might function as square wave there are 0 100 accuracy difference according to the different rising time and falling time set 4 2 5 3 Trapezoidal Wave When the four time parameters that need to set are all bigger than zero and the dynamic testing operation mode is continuous mode the load output wave is trapezoidal wave It has the same frequency characteristics with the triangular wave 4 2 6 Trigger Control When dynamic testing oper
36. ing Registers Example Query Field Name Byte length Example Value Slave Address 1 1 200 Function Code 1 0x03 Starting Address 2 O OxFFFF No of Points 2 n 1 32 CRC Error Check 2 Read Holding Registers Example Nomal Response Field Name Byte length Example Value 35 YO IE ENTERPRISE CORP LTD Slave Address 1 1 200 Function Code 1 0x03 Byte Count 1 2 n Data 2 n CRC Error Check 2 Read Holding Registers Example Abnormal Response Field Name Byte length Example Value Slave Address 1 1 200 Function Code 1 0x83 Abnormal Code 1 01 04 CRC Error Check 2 For example The following example reads the present voltage value at slave device address 0x01 From table 4 8 7 1 we know that the register address of the present voltage value is Ox0B00 Query 0x01 0x03 Ox0B 0x00 0x00 0x02 OxC6 0x2F The Corresponding Nomal Response 0x01 0x03 0x04 0x41 0x20 0x00 0x2A Ox6E 0x1A among which 0x41 0x20 0x00 0x2A is the read back voltage value the corresponding floating point number is 10V 4 Preset Multiple Registers 0x10 Preset Multiple Registes Example Query Field Name Byte length Example Value Slave Address 1 1 200 Function Code 1 0x10 Starting Address 2 O OxFFFF No of Registers 2 n 1 32 Byte count 1 2 n Preset Data 2 n CRC Error Check 2 Preset Multiple Registers Exa
37. into the constant loading and unloading constant resistance mode When the VFD display shows ONSET VOLT xxxxxxxxV indicating the current loading voltage press the numeric keys and decimal point key to 15 YO IE ENTERPRISE CORP LTD enter the loading voltage value required followed by pressing the key Enter to confirm Then the VFD will shows OFFSET VOLT xxxxxxxxV indicating the current unloading voltage Press the numeric keys and decimal point key to enter the unloading voltage value required followed by pressing the key Enter to confirm In this way the load will enter into the loading and unloading constant resistance mode If the input state is in OFF state then the right upper corner of the VFD display will show the word OFF Press the key On Off to change the input state into ON state Then the right upper corner of the VFD display will show the word CR_UN or Unreg Showing CR_UN means the load has been successfully set into the expected constant resistance value showing Unreg means the load could not adjust itself to the expected constant resistance value Please check if the measured power supplier has been correctly connected and turned on make sure if the voltage is normal and if the output current of the measured power supplier is in the range of the current value that the expected resistance can absorb In loading and unloading constant current mode press the key Shift 1 V_Level the load will back into the standard cons
38. irm 2 When the VFD display shows MINIMUM TM xxxxxx mS indicating the minimum time that requires to be set Since this value affects the fine tuning and operable length of all kinds of waveforms please carefully select the suitable parameters Then press the key Enter to confirm The electronic load will go into the following three output modes LIST CONTINOUS LIST END HOLD and LIST END RESET Press the A and Y keys to select one output mode you wanted followed by pressing the key Enter to confirm LIST CONTINOUS means continuous output mode LIST END HOLD means the electronic load will remain the last value you set in the last step when all the steps you set in one set of data have been successfully executed LIST END RESET means the electronic load will reset to be load off mode when all the steps you set in one set of data have been successfully executed 3 After pressing the key Enter to confirm the VFD display will show STEP LENG xxx indicating the step length that requires to be set Then press the numeric keys to input the step length you want to set followed by pressing the key Enter to confirm Please note that the step length should be the round number of 1 200 4 When the VFD display shows STEP 1 CURR xxxxxA indicating the current that requires to be set in the first step press the numeric keys to input the current you want to set in the first step followed by pressing the key Enter to confirm When the VFD display shows STEP
39. matic test The automatic test can also be initiated by lowering the voltage level of TRIG IN port and lasting more than 5mS When in testing the right lower corner of the VFD display will show WAIT or STAY meaning waiting for testing or staying in the suspended mode respectively Please retrigger it so that it goes on testing After testing the right lower corner of the VFD display will show either PASS or FAIL When failure the buzzer will sound At this moment initiate next trigger or press any key to free from the indication of pass or fail When once automatic test is finished users can press the A and Y keys to initiate manually operated test mode Every time press the key A or the key Y once the load will begin to the carrying test of the last step or the next step Users can observe the actual state of every step When the key ON OFF is pressed or a trigger is input the electronic load will automatically exit from the manually operated test mode and start to automatic test again 4 3 Input Control 4 3 1 Short Circuit Operation SHORT Load can simulate a short circuit at the input end by turning the load on with full scale current The short circuit can be toggled on off at the front panel by pressing the key Shift 9 Short Short circuit operation does not influence the current value set When short circuit operation is on OFF state the Load will back to the original setting state The actual current value that the load consume
40. matically regulated to be the round number times of 20uS 4 1 4 Constant Power Operation Mode CW In this mode the electronic loads will consume a constant power Please refer to the picture 4 9 If the load input voltage value increase the load input current will decrease Therefore the load power V I will remain in the power set Load input voltage V2 REN Power set v3 ee a 12 13 de Load current Picture 4 9 Constant Power Mode 4 1 4 1 Setting up a Standard Constant Power Mode Press the key P SET then the VFD display will show STANDARD POWER xxxxxxxxW indicating the current constant power Then Press the numeric keys and decimal point key to enter the constant power value required followed by pressing the key Enter In this way the load will enter into the standard constant power mode YO IE ENTERPRISE CORP LTD If the input state is in OFF state then the right upper corner of the VFD display will show the word OFF Press the key On Off to change the input state into ON state Then the right upper corner of the VFD display will show the word CW or Unreg Showing CW means the load has been successfully set into the expected constant power value showing Unreg means the load couldn t adjust itself to the expected constant power value Please check if the measured power supplier has been correctly connected and turned on make sure if the voltage of the power supplier is normal and the maximum output current of
41. mple Response Field Name Byte length Example Value Slave Address 1 1 200 Function Code 1 0x10 Starting Address 2 O OxFFFF No of Registers 2 N CRC Error Check 2 Preset Multiple Registers Example Abnormal Response Field Name Byte length Example Value Slave Address 1 1 200 Function Code 1 0x90 Abnormal Code 1 01 04 CRC Error Check 2 36 YO IE ENTERPRISE CORP LTD For example The following example sets the load s constant current IFIX is 2 3A at slave device address 0x01 From table 4 8 7 1 we know that the IFIX register address is Ox0A01 the floating point takes up two word length Query 0x01 0x10 Ox0A 0x01 0x00 0x02 0x04 0x40 0x13 0x33 0x33 OxFC 0x23 The Corresponding Normal Response 0x01 0x10 Ox0A 0x01 0x00 0x02 0x13 0xDO 4 8 7 Coil with the Register Address Allocation Table 1 Coil bit definition Name Address Bit Property Description PC1 0x0500 1 WIR When remote control status bit is 1 front key panel unable PC2 0x0501 1 WIR When local prohibition bit is 1 not allow to use key Shift 7 to snatch away the front panel control TRIG 0x0502 1 WIR Trigger tagged triggered once by software REMOTE 0x0503 1 WIR 1 remote input voltage ISTATE 0x0510 1 R Input status 1 input ON O intput OFF TRACK 0x0511 1 R Tracking status 1 voltage tracking O current tracking MEM
42. n than the constant current value set the electronic load might fail to adjust itself to the constant current and the voltage of the measured power supply could be changed to be low A I Current Set Load current gt Load voltage Vv 4 1 Constant Current Mode 4 1 1 1 Setting up a Standard Constant Current Mode Press the key I SET then the VFD display will show STANDARD CURR xxxxxxxxA the current constant current value Press the numeric keys and decimal point key to enter the constant current value required followed by pressing the key Enter to confirm Then the load will enter into the standard constant current If the input state is in OFF state then the right upper corner of the VFD display will show the word OFF Press the key On Off to change the input state into ON state Then the right upper corner of the VFD display will show the word CC or Unreg Showing CC means the load has been successfully set into the expected constant current value showing Unreg means the load couldn t adjust itself to the expected constant current value Please check if the measured power supplier has been correctly connected and turned on make sure if the expected constant current value is in the range of the measured power supplier 11 YO IE ENTERPRISE CORP LTD If you want to fine tune the constant current value you can rotate the selective encoder knob to adjust the value Rotating clockwise is to increase the value while rot
43. nt unload voltage register double type UCVONSET 0x0A11 WIR Constant voltage load voltage register double type UCVOFFSET 0x0A13 WIR Constant voltage unloaded voltage regi double type UCPONSET 0x0A15 WIR Constant power load voltage register double type UCPOFFSET 0x0A17 WIR Constant power unload voltage register doubl type UCRONSET 0x0A19 WIR Constant resistance load voltage register double type UCROFFSET 0x0A1B WIR f Constant resistance unload voltage register double type UCCCV 0x0A1D W R constant current shift constant voltage register double type UCRCV 0x0A1F W R Constant resistance shift constant voltage register double type IA 0x0A21 WIR dynamic mode A phase current register double type IB 0x0A23 WIR dynamic mode B phase current register double type TMAWD 0x0A25 WIR dynamic mode A pulse width registers double type TMBWD 0x0A27 WIR dynamic mode B pulse width registers double type TMTRANRIS 0x0A29 WIR Dynamic mode rising time register r double type TMTRANFAL 0x0A2B W R Dynamic model falling time register double type MODETRAN 0x0A2D W R Dynamic mode register u16 type UBATTEND Ox0A2E W R Battery Test termination voltage register double type BATT 0x0A30 W R Battery capacity register double type SERLIST 0x0A32 WIR LIST serial number register u16 type SERATEST 0x0A33 WIR e e Automatic Test serial number register u16 type 38 YO IE ENTERPRISE CORP LTD
44. oading voltage press the numeric keys and decimal point key to enter the loading voltage value required followed by pressing the key Enter to confirm Then the VFD will shows OFFSET VOLT xxxxxxxxV indicating the current unloading voltage Press the numeric keys and decimal point key to enter the unloading voltage value required followed by pressing the key Enter to confirm In this way the load will enter into the loading and unloading constant voltage mode If the input state is in OFF state then the right upper corner of the VFD display will show the word OFF Press the key On Off to change the input state into ON state Then the right upper corner of the VFD display will show the word CV_UN or Unreg Showing CV_UN means the load has been successfully set into the expected constant voltage value showing Unreg means the load couldn t adjust itself to the expected constant voltage value Please check if the measured power supplier has been correctly connected and turned on make sure if the voltage is normal and if the maximum output current of the measured power supplier is in the range of the maximum current that the load can absorb In loading and unloading constant voltage mode press the key Shift 1 V_Level the load will back into the standard constant voltage mode 4 1 3 3 Soft Start Constant Voltage Mode Soft start constant voltage mode functions as a condensive load simulating electric capacity which is in direct proportion with the
45. plier has been correctly connected and turned on make sure if the voltage of the measured power supplier is normal and if the output current is beyond the maximum current that the load can carry If you want to fine tune the constant voltage value you can rotate the selective encoder knob locating at the right upper corner of the front panel to adjust the value Rotating clockwise is to increase the value while rotating anti clockwise is to decrease the value Note if the constant voltage value you want to set is 17 YO IE ENTERPRISE CORP LTD beyond the maximum constant voltage value of the load the current value will stop to be increased even if you still rotate the selective encoder knob clockwise Then the right lower corner of the VFD display shows the constant voltage value you set among which a cursor shows under one number meaning this number requires fine tuning If users want to change the fine tuning accuracy just press the rotary encoder knob in which a key is included Every time when you press the rotary encoder once the cursor will move forward to the previous number 4 1 3 2 Loading and Unloading Constant Voltage Mode As for the loading and unloading mode theory please refer to the 3 1 1 2 illustration When in standard constant voltage mode press the key Shift 1 V_Level to enter into the constant loading and unloading constant voltage mode When the VFD display shows ONSET VOLT xxxxxxxxV indicating the current l
46. point of unloading voltage thus the measured power supplier can be well protected U ON SET OFF SET OFF ON OFF Picture 4 2 Loading and Unloading Mode When in standard constant current mode press the key Shift 1 V_Level and enter into the loading and unloading constant current mode When the VFD display shows ONSET VOLT xxxxxxxxV indicating the current loading voltage press the numeric keys and decimal point key to enter the loading voltage value required followed by pressing the key Enter to confirm Then the VFD will shows OFFSET VOL T xxxxxxxxV indicating the current unloading voltage Press the numeric keys and decimal point key to enter the unloading voltage value required followed by pressing the key Enter to confirm In this way the load will enter into the loading and unloading constant current mode 12 YO IE ENTERPRISE CORP LTD If the input state is in OFF state then the right upper corner of the VFD display will show the word OFF Press the key On Off to change the input state into ON state Then the right upper corner of the VFD display will show the word CC_UN or Unreg Showing CC_UN means the load has successfully set into the expected constant current value showing Unreg means the load could not adjust itself to the expected constant current value Please check if the measured power supplier has been correctly connected and turned on make sure if the voltage is normal and if the expected constant current val
47. rise time of soft start In this mode the measured power supplier can be avoided from current strike damage VOLT SETTING RISING TIME 18 YO IE ENTERPRISE CORP LTD Picture 4 8 Soft Start Constant Voltage Mode When in standard constant voltage mode press the key Shift 2 S_Start to enter into the soft start constant voltage mode When the VFD display shows RISING TM xxxxxxxxvmS indicating the current rising time press the numeric keys and decimal point key to enter the rising time required followed by pressing the key Enter In this way the load will enter into the soft start constant voltage mode If the input state is in OFF state then the right upper corner of the VFD display will show the word OFF Press the key On Off to change the input state into ON state Then the right upper corner of the VFD display will show the word CV_S or Unreg Showing CV_S means the load has been successfully set into the expected constant voltage value showing Unreg means the load couldn t adjust itself to the expected constant voltage value Please check if the measured power supplier has been correctly connected and turned on make sure if the maximum output current of the measured power supplier is in the range of the maximum current that the load can absorb In loading and unloading constant voltage mode press the key Shift 2 S_ Start the load will back into the standard constant voltage mode Note The rise time which is set is auto
48. rison voltage comparison power comparison and resistance comparison Short Circuit SHORT MODE Compare the current when in short circuit mode Mode 25 YO IE ENTERPRISE CORP LTD 4 When the VFD display shows STEP 1 TEST xxxx indicating the test types There are four test types test current test voltage test power test resistance Press the A and Y keys to select one from those four types followed by pressing the key Enter to confirm If in last step step 3 you choose load off mode or short circuit mode then the electronic load will skip step 4 5 When the VFD display shows DELAY TM xx xS indicating the delay time of each step The valid range of the delay time is 0 1 25 5S The lower value you set the shorter time the test needs But in certain circumstances too lower value may affect the test results because the test has been finished before the power supply reaches static state so please carefully select the delay time you wanted to set The recommended delay time is 0 55 Note 25 55 is set as suspended mode So the delay time of a certain step is set as 25 5S the load will stop to be proceeded to the next step until a trigger is input The trigger can be made either by the hardware in the back panel or by pressing the key Shift Trigger or the On Off key in the front panel 6 When the VFD display shows INPUT xxxx xxxxxx indicating the corresponding current value set voltage value set
49. rned on make sure if the expected constant current value is in the range of the measured power supplier YO IE ENTERPRISE CORP LTD In loading and unloading constant current mode press the key Shift 2 S_Start the load will back into the standard constant current mode Note The rise time set is automatically regulated to be the round number times of 20uS 4 1 1 4 Constant Current Shifting into Constant Voltage Mode In constant current shifting into constant voltage mode the measured power supplier can be avoided from current strike damage Load input voltage v Picture 4 4 Constant Current Shifting into Constant Voltage Mode When in standard constant current mode press the key Shift 4 CC CV to enter into the constant current shifting into constant voltage mode When the VFD display shows CC TO CV VOLT xxxxxxxxV indicating the current constant voltage value press the numeric keys and decimal point key to enter the constant voltage value required followed by pressing the key Enter to confirm In this way the load will enter into the constant current shifting into constant voltage mode If the input state is in OFF state then the right upper corner of the VFD display will show the word OFF Press the key On Off to change the input state into ON state Then the right upper corner of the VFD display will show the word CC CV or Unreg Showing CC CV means the load has been successfully set into the expected constant current value sho
50. rsed When the electronic load is in input polarity reversed state the buzzer will sound and the VFD display will show REVERSE 29 YO IE ENTERPRISE CORP LTD 4 5 5 Over Heat Protection OH If internal power component s temperature exceeds 80 C over height protection will be initiated automatically Load will turn off the input and Buzzer will sound and VFD display will show OVERHEAT 4 6 Remote Sense Function When the load consumes high current the power supply will produce voltage drop in the connecting wire between power supply and load terminals In order to guarantee the measurement accuracy remote measurement terminals are installed at the rear panel of the power supply Users can measure the output terminals voltage of the instrument under test by these terminals Before performing the remote sense function you need to set the power supply as the remote measurement mode see the section 3 6 Menu Function in this manual The remote measurement function can be set by pressing the key Shift 0 Menu When the VFD display shows MENU SYSTEM SET press the key Enter to confirm Then the VFD display shows SYSTEM IMAX xxxxxxxxA Press the Up and Down keys to make adjustment until the VFD display shows SYSTEM TERMINAL SEL indicating to set the parameters of the current remote measurement function then press the key Enter to confirm When the VFD display shows TERMINAL SELECT FRONT or TERMINAL SELECT BACK press the Up and Down keys
51. s in short circuit condition is dependent on the working mode and current range of the load that are active In CC CW and CR mode the maximum short circuit current value is 1 2 times of the current range In CV mode short circuit operation is same as the operation of setting constant voltage to OV 4 3 2 Input On Off Operation When the load input state is in ON state you can press the key On Off to change the input state into OFF state Then the right upper corner of the VFD display shows OFF When the load input state is in OFF state you can press the key On Off to change the input state into ON state Then the right upper corner of the VED display shows ON indicating the current working state 27 YO IE ENTERPRISE CORP LTD 4 4 Electronic Load Operation Range Electronic load works in the range of Rated Current Rated voltage and Rated Power Please refer to the picture 4 13 and picture 4 14 Picture 4 13 Electronic Load Power Range Electronic load Mode Change Software Maximum Power Set Software Maximum Current Set Picture 4 14 Software Maximum Setting Value 4 5 Protection Functions Electronic load includes the following protection functions 4 5 1 Over Voltage Protection OV If input voltage exceeds the voltage limit load will turn off the input Buzzer will sound and the VFD display shows Over Volt The load maximum voltage value can be set by pressing the key Shift 0 Menu When
52. set UCVOFFSET Double Optional Multi Registers Preset CMD 31 mandatory Multi Registers Table 16 CW loading and unloading mode Operation Register Value Description Preset PFIX Double Optional Multi Registers Preset UCPONSET Double Optional Multi Registers Preset UCPOFFSET Double Optional Multi Registers Preset CMD 32 mandatory Multi Registers Table 17 CR loading and unloading mode Operation Register Value Description Preset RFIX Double Optional Multi Registers Preset UCRONSET Double Optional Multi Registers Preset UCROFFSET Double Optional Multi Registers Preset CMD 33 mandatory Multi Registers Table 18 CC mode switch to CV mode Operation Register Value Description Preset IFIX Double Optional Multi Registers Preset UCCCV Double Optional Multi Registers Preset CMD 34 mandatory Multi Registers Table 19 CR mode switch to CR mode Operation Register Value Description 42 YO IE ENTERPRISE CORP LTD Preset RFIX Double Optional Multi Registers Preset UCRCV Double Optional Multi Registers Preset CMD 35 Must select Multi Registers Table 20 battery test mode Operation Register Value Description Preset IFIX Double Optional Multi Registers Preset UBATTEND Double Optional Multi Registers Preset CMD 38 mandatory Multi Registers Table 21 Dynamic Test Mode Operation Register Value Description Preset
53. ss is 0x0510 Query 0x01 0x01 0x05 0x10 0x00 0x01 OxFC 0xC3 34 YO IE ENTERPRISE CORP LTD The Corresponding Nomal Response 0x01 0x01 0x01 0x48 0x51 OxBE among which 0x48 is the read back data and its lowest bit is 0 this means the input state ISTATE is OFF 2 Force Single Coil 0x05 Force Single Coil Example Query Field Name Byte length Example Value Slave Address 1 1 200 Function Code 1 0x05 Coil Address 2 O OxFFFF Force Data Coil Status 2 0x0000 or xFFOO CRC Error Check 2 Force Single Coil Example Normal Response Field Name Byte length Example Value Slave Address 1 1 200 Function Code 1 0x01 Coil Address 2 O OxFFFF Force Data Coil Status 2 0x0000 or OxFFOO CRC Error Check 2 Force Single Coil Example Abnormal Response Field Name Byte length Example Value Slave Address 1 1 200 Function Code 1 0x85 Abnormal Code 1 01 04 CRC Error Check 2 A value of OxFFOO forces the coil to be ON and 0x0000 forces the coil to be turned OFF All other values are invalid and will not affect the coil For example The following example sets the load is in remote control at slave device address 0x01 From table 4 8 7 1 we know that the PC1 remote address is 0x0510 Query 0x01 0x05 0x05 0x00 OxFF 0x00 Ox8C OxF6 The Correponding Response 0x01 0x05 0x05 0x00 OxFF 0x00 Ox8C OxF6 3 Read Holding Registers 0x03 Read Hold
54. tant resistance mode 4 1 2 3 Constant Resistance Shifting into Constant Voltage Mode 4 I gt U Picture 4 6 Constant Resistance Shifting into Constant Voltage Mode In constant resistance shifting into constant voltage mode the measured power supplier can be avoided from current strike damage When in standard constant current mode press the key Shift 5 CR CV to enter into the constant current shifting into constant voltage mode When the VFD display shows CR TO CV VOLT xxxxxxxxV indicating the current constant voltage value press the numeric keys and decimal point key to enter the constant voltage value required followed by pressing the key Enter to confirm In this way the load will enter into the constant resistance shifting into constant voltage mode If the input state is in OFF state then the right upper corner of the VFD display will show the word OFF Press the key On Off to change the input state into ON state Then the right upper corner of the VFD display will show the word CR CV or Unreg Showing CR CV means the load has been successfully set 16 YO IE ENTERPRISE CORP LTD into the expected constant resistance value showing Unreg means the load could not adjust itself to the expected constant resistance value Please check if the measured power supplier has been correctly connected and turned on make sure if the voltage is normal In loading and unloading constant resistance mode press the key
55. te then the right upper corner of the VFD display will show the word OFF Press the key On Off to change the input state into ON state Then the right upper corner of the VFD display will show the word CR or Unreg Showing CR means the load has been successfully set into the expected constant resistance value showing Unreg means the load couldnot adjust itself to the expected constant resistance value Please check ifthe measured power supplier has been correctly connected and turned on make sure if the output current of the measured power supplier is in the range of the current value that the expected resistance can absorb If you want to fine tune the constant resistance value you can rotate the selective encoder knob to adjust the value Rotating clockwise is to increase the value while rotating anti clockwise is to decrease the value Then the right lower corner of the VFD display shows the constant resistance value you set among which a cursor shows under one number meaning this number requires fine tuning If users want to change the fine tuning accuracy just press the rotary encoder knob in which a key is included Every time when you press the rotary encoder once the cursor will move forward to the previous number 4 1 2 2 Loading and Unloading Constant Resistance Mode Please refer to the 3 1 1 2 illustration for the loading and unloading mode theory When in standard constant resistance mode press the key Shift 1 V_Level to enter
56. the measured power supplier is undercurrent If you want to fine tune the constant power value you can rotate the selective encoder knob to adjust the value Rotating clockwise is to increase the value while rotating anti clockwise is to decrease the value Then the right lower corner of the VFD display shows the constant power value you set among which a cursor shows under one number meaning this number requires fine tuning If users want to change the fine tuning accuracy just press the rotary encoder knob in which a key is included Every time when you press the rotary encoder once the cursor will move forward to the previous number 4 1 4 2 Loading and Unloading Constant Power Mode As for the loading and unloading mode theory please refer to the 3 1 1 2 illustration When in standard constant power mode press the key Shift 1 V_Level to enter into the constant loading and unloading constant power mode When the VFD display shows ONSET VOLT xxxxxxxxV indicating the current loading voltage press the numeric keys and decimal point key to enter the loading voltage value required followed by pressing the key Enter to confirm Then the VFD will shows OFFSET VOLT xxxxxxxxV indicating the current unloading voltage Press the numeric keys and decimal point key to enter the unloading voltage value required followed by pressing the key Enter to confirm In this way the load will enter into the loading and unloading constant power mode If t
57. the VFD display shows MENU SYSTEM SET press the key Enter to confirm Then the VFD display shows SYSTEM IMAX xxxxxxxxA Press the Up and Down keys to make adjustment until the VFD display shows SYSTEM UMAX xxxxxxxx Vindicating the current maximum voltage value then enter the maximum voltage value required by pressing the numeric keys and decimal point key followed by pressing the key Enter to confirm Then press the key Esc to escape the Menu item 28 YO IE ENTERPRISE CORP LTD Note The maximum voltage value of YI 6611 electronic load is 150V When it is beyond 150V it will be automatically adjusted to 150V Besides the maximum voltage value has close relation with the voltage resolution If the maximum voltage value is below 20V the load voltage resolution will be 0 1mV if the maximum voltage value is beyond 20V then the load voltage resolution will be only 1mV 4 5 2 Over Current Protection OC When input current exceeds the current limit Buzzer will sound and VFD display will shows OVER CUR The load maximum voltage value can be set by pressing the key Shift 0 Menu When the VFD display shows MENU SYSTEM SET press the key Enter to confirm Then the VFD display shows SYSTEM IMAX xxxxxxxxA indicating the current maximum current value Press the numeric keys and decimal point key to enter the maximum current value required followed by pressing the key Enter to confirm Then press the key Esc to escape the Menu item Note T
58. the about personal safety place Certification and Warranty YI 66 Series Electrical Loads meet its published specifications at time of shipment from the factory Warranty This instrument product is warranted against defects in material and workmanship for a period of one year from date of delivery Maintenance Service This product must be returned to maintenance department designated by our company for repairing Customer shall prepay shipping charges and shall pay all duty and taxes for products returned to the supplier for warranty service Except for products returned to customer from another country supplier shall pay for return of products to customer Limitation of Warranty The foregoing warranty shall not apply to 1 Defects resulting from improper or inadequate maintenance by the Customer 2 Customer supplied software or interfacing 3 Unauthorized modification or misuse 4 Operation outside of the environmental specifications for the product or improper site preparation and maintenance 5 Defects resulting from the circuit installed by clients themselves Attention No inform will be given for any changes in the content of the user s guide Thiscompany reserves the right to interpret 47
59. to select the parameters of remote measurement function Showing TERMINAL SELECT FRONT means input terminals selected is at the front panel and the remote measurement function of the rear panel is closed showing TERMINAL SELECT BACK means input terminals selected is at the rear panel and the remote measurement function of the front panel is closed Then press the key Esc to escape the Menu item Note At any time either the input terminals at the front panel or at the back panel is initiated It is impossible to initiate the input terminals both at the front panel and at the back panel together If the voltage of the load is near to zero point and does not change according to the signal please check if the wire mode matches the parameters of the remote measurement function Please refer to the picture 4 4 for the trigger terminals and measurement terminals EN S STRQTRI GND 5 5 TRQ TRI GND Piccture4 4 Remote Measurement Terminals S and S are remote measurement terminals TRQ and TRI are trigger terminals the last two terminals are ground terminals 30 YO IE ENTERPRISE CORP LTD The output of power supply will be turned off when testing out the change in voltage level from high to low from TRQ port which is under the latched mode of the remote control function As a multifunction extended port TRI port is designed for future expanded The following diagram shows the remote sense terminals on the back panel of the instrument
60. ue is in the range of the measured power supplier In loading and unloading constant current mode press the key Shift 1 V_Level the load will back into the standard constant current mode 4 1 1 3 Soft Start Constant Current Mode Soft start constant current mode functions as an inductive load simulating inductance value which is in direct proportion with the rise time of soft start In this mode the measured power supply can be avoided from current strike damage Load current Rising Time T Picture 4 3 Soft Start Current Mode When in standard constant current mode press the key Shift 2 S_Start to enter into the soft start constant current mode When the VFD display shows Rising TM xxxxxxxxvmS indicating the current rising time press the numeric keys and decimal point key to enter the rising time required followed by pressing the key Enter In this way the load will enter into the soft start constant current mode If the input state is in OFF state then the right upper corner of the VFD display will show the word OFF Press the key On Off to change the input state into ON state Then the right upper corner of the VFD display will show the word CC_S or Unreg Showing CC_S means the load has been successfully set into the expected constant current value showing Unreg means the load couldn t adjust itself to the expected constant current value Please check if the measured power supplier has been correctly connected and tu
61. ulse time Falling time from value B to value A and dynamic testing operation mode There are three kinds of dynamic testing operation mode continuous mode pulse mode and trigger mode 4 2 1 Continuous Mode CONTINUOUS In this mode the electronic load will periodically switch between value A and value B when the dynamic testing operation is turned on 5A 2 0ms 3 0ms Picture 4 10 Continuous Operation Mode 4 2 2 Pulse Mode PULSE In this mode when the dynamic testing operation is turned on the electronic load will switch to value B as receiving one trigger signal taking the pulse time TWD of value B Load will return to Value A 5A TWD TWD 10ms lt 10ms gt TRIG TRIG Picture 4 11 Pulse Operation Mode 4 2 3 Trigger Mode TRIGGER In this mode when the dynamic testing operation is turned on the electronic load will switch the state between value A and value B once receiving a triggering signal 21 YO IE ENTERPRISE CORP LTD DATT TRG T Picture 4 12 Trigger Operation Mode 4 2 4 Setting up Dynamic testing operation Parameters Press the key Shift 6 S_Tran then the load VFD display shows LEVEL A CURR xxxxxxxxA indicating the current value A set Press the numeric keys and decimal point key to enter the current value required followed by pressing the key Enter to confirm Then the load VFD display shows WIDTH A TM xxxxxxxxmS indicating the current lasting time of current v
62. will display BUADRATE xxxxx you can choose the appropriate baudrate as you need and press Enter to confirm Totally 6 different baudrate provided for selection 2400 9600 14400 28800 57600 115200 4 8 3 Data In some data frame the date length is fixed but there are some data frame length is not fixed According to Modbus protocol in the data field all the hex data and floating point number are formed as the High Byte in the former and Low byte in the after Addition the output value of force single coil must be 0x0000 or OxFFOO 0x0000 means OFF while OxFFOO means ON All other values are invalid and will not affect the coil 4 8 4 Function Code Function codes are single byte hex number there are 4 function modes as follows Function Code Description 0x01 Read Coil Status read the data by the bit 0x05 Force Single Coil write the data by the bit 0x03 Read Holding Registers read the data by the word 0x10 Preset Multiple Registers write the data by the word 33 YO IE ENTERPRISE CORP LTD 4 8 5 Error checking CRC YI 66 series load use the Cyclic Redundancy Check CRC The CRC field checks the contents of the entire message The CRC fileld is two bytes containing a 16 bit binary value When the CRC ia appended to the message the low order byte is appended first followed by the high order byte The discipline is as follows a Setup one hex CRC register and give the initial value as OxFFFF
63. wing Unreg means the load could not adjust itself to the expected constant current value Please check if the measured power supplier has been correctly connected and turned on make sure if the voltage is normal In loading and unloading constant current mode press the key Shift 4 CC CV the load will back into the standard constant current mode 4 1 2 Constant Resistant Operation Mode CR In this mode the module will sink a current linearly proportional to the input voltage in accordance with the programmed resistance Please refer to the picture 4 5 Note when the voltage of the measured power supplier is too high and the resistance set is too low it will result in the consumed current higher than the maxim output current of the measured power supplier 14 YO IE ENTERPRISE CORP LTD or result in the loads failing to adjust itself automatically to the constant resistance even result in the load shock Load current Slop resistance set gt Load input voltage v Picture 4 5 Constant Resistance Mode 4 1 2 1 Setting up a Standard Constant Resistance Mode Press the key R SET then the VFD display will show STANDARD RESI xxxxxxxxQ indicating the current constant resistance Then Press the numeric keys and decimal point key to enter the constant resistance value required followed by pressing the key Enter In this way the load will enter into the standard constant resistance mode If the input state is in OFF sta
64. you change another new battery Operation 1 In standard constant current mode adjust the load current value to the discharge current value of battery required 2 Press the key Shift 8 Battery When VFD display shows END TEST VOLT xxxxxxxxV set the turn off voltage and press the key Enter to start the capability test When the voltage drops to the turn off voltage the load will automatically turn off 3 Press the key On Off to start or to pause the battery capability test 4 Press the key Shift 8 Battery to escape the battery capability test mode V Battery Voltage D se enee Arie Sr Sege SE Min voltage A Load Sink Current T Picture 4 16 Battery Capability Schemas 4 8 Communication protocol 4 8 1 Introduction YI 66 series programmable electronic loads work with Modbus protocol The data frame contains 4 parts as follows Salve Address Function Code Data Error Checking CRC To make sure high reliability for the communication we need to set the frame pitch greater than 3 5 times of the transient time of single bit byte Eg When the baud rate is 9600 then the frame pitch time must be greater than 11 3 5 9600 0 004s 32 YO IE ENTERPRISE CORP LTD YI 66 series programmable electronic loads provided with double way asynchronous communication fixed 1 bit as the start bit 8 data bit and 1 stop bit Support Non parity check Odd Parity check and even parity check Baudrat

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