User manual - DV Industrial Computer
Contents
1. ez 170 gt Ga ooo Y 250 o 5 ooo oe LU DDI oS 0 000 Aare a 0p 000 leS 0 pci fs O00 ns 13 0007 o D 000 os LY GU T ip eS C U 60 Dt i D coca 2 ef ae cg E re Mm ds T mn a D nF LLL m LA Y LUU Ol amp go eal o2 TT ym o E PAPA b Uo A ee 10 O T 8 mnf 9 22 S pongo dj gt 2x03 2 1975 ALAA SE JPB 20 10 3 3 x 18 a S So E 9 E EL A E GS lG DR 5 Co OS D wa 4 4 2 2 11 JP9 R ola Pin escription OOI 3 1 T_SIGNAL LJ E GND N 1 J5 SETTINGS N Pin Description ssl USER ou EFAULTS 15 Bo Sasa be S A JP1 INPUT PUWER JPS HDD OUT TH 4F JPe RESET SWITCH Pin Description MOLEX 8981 04P Pin Description 1 POWER S TALE 1 RESET SW 2 IGNITION gt Pin pes e pre Lolo 2 GND 3 GND BATTERY 2 END cla Spa 7 Guo Block ea 5V Red 9 RTI HS y ESE ARNO a JP7 12V DUT MF2x02SH e es MOLEX 39 01 2040 38 b Pin Description wire Color el J5 fa GND Black ee 4 ee eee ce l a 2 GND Black L gt gt 2 5 E 3 12v Yellow af EE D S HEE Yellow JP3 POWER JP8 OUT MFexl0OSH MOLEX 39 01 22. Cti H Space Ctrl H Emulation v Terminal Setup Telnet terminal ID TELETYPE 33 Backscroll buffer lines 500 Play sound when connecting or disconnecting Input Translation ASCII Setup Cancel INPC DP024 Automotive PSU 10 When Hyper Terminal configuration has been finished everything is ready to dialog with the DP024 Commands that are entered on terminal keyboard are sent to the DP024 via serial port while input data flow is displayed on terminal window In the clear terminal window enter the first command h help press keys h and then Enter As a response the controller sends firmware release number and list of commands that are supported PSU HyperTerminal a n Mpaska Bua Bbisos NMepegava Cnpaska STANDBY OK gt h DP024 PSU Y0 02 a All display h this Help x fan eXamination b get standBy delay B100 set standBy delay 100s 07255 cb get standBy Counter cs get Sleep timer Counter value fe get slEEp delay E100 set slEEp delay 100s 07255 f get conFiguration F0 set conFiguration 0 0 or 1 autostart gl get Low voltaGe threshold G122000 set threshold 22000mY 18000729000 gh get low voltaGe Histeresis Gh2000 set Hysteresis 2000mY 300 5000 m get RPH n get Number of firmware versio p 21 get PWM for 21 C P 18 40 set PWH 40 for 18 C PHM O or 40 100 r 45 get RPM for 45 PWM R2450 900 set RPM 900 for S X PWM Fan2 1 or 2 s get current Status t get Tempera
3. INPC DP024 Automotive PSU 8 Using the serial line of the DP022 in MS Windows MS Windows XP for example Assume that computer has available COM3 port that should be set as 9600 8 bit no parity 1 stop bit operation As a dialog application let us use Hyper Terminal that is included in MS Windows To get it ready open the folder Communications and run Hyper Terminal click on Start button and then Programs Accessories Communications The dialog window appears on the screen Let us name our connection as PSU arbitrary name Connection Description ax Y New Connection Enter a name and choose an icon for the connection Name Psu E PSU Enter details for the phone number that you want to dial Country region United States 1 Area code fi Phone number Connect using M lt Cancel INPC DP024 Automotive PSU 9 And set up COM3 properties COM3 Properties Port Settings Bits per second Data bits fe yl Parity None y Stop bits h y Flow control Hardware y Restore Defaults Cancel Apply Click on File button in main menu of Hyper Terminal program and click on item Properties in pop up menu In dialog window PSU Properties select bookmark Settings and select the following properties PSU Properties 21 5 Connect To Settings Function arrow and ctrl keys act as Terminal keys Windows keys Backspace key sends Crib Del
4. the DP024 will switch into StandBy state The Trip Threshold Low Voltage Hysteresis value is being stored in EEPROM Gh set new value of Trip Threshold Low Voltage Hysteresis Press keys G h and then type value of millivolts from 500 to 5000 and finish with Enter You can check accuracy of setting by gh command get Trip Threshold Low Voltage Hysteresis h get list of commands Press two keys h and Enter As a response the DP024 sends firmware release number and list of commands INPC DP024 Automotive PSU 13 m get current Value of Rotation Speed for both Fans Press three keys m and Enter As a response the DP024 sends two values of rotation speed revolutions per minute RPM that have been measured for both fans and are separated by symbol slash First value is for the first fan and second for the second fan You can control RPMs for both fans on the fly by sending this command periodically n get firmware release number Press three keys n and Enter As a response the DP024 sends firmware release number p T get table Value of PWM for indicated temperature NOT SUPPORTED IN V0 02 P T P set new table Value of PWM for indicated temperature NOT SUPPORTED IN V0 02 r P get table Value of threshold RPM for indicated PWM NOT SUPPORTED IN V0 02 RE P R set new table Value of threshold RPM for indicated Fan and PWM NOT SUPPORTED IN V0 02 s get current state Press three keys s and E
5. T2 timer when the DP024 switches into StandBy state After that T2 timer starts time countdown The DP024 switches to Sleep state when T2 timer expires The SLEEPDELAY value is being stored in EEPROM E set new value of SLEEPDELAY Press two keys E and then type value of seconds from 0 to 255 at finish with Enter You can check accuracy of setting by e command get SLEEPDELAY If you set SLEEPDELAY to 0 then the DP024 will switch to StandBy state at no time INPC DP024 Automotive PSU 12 f get CONFIGURATION Press three keys f and Enter As a response the DP024 sends current value of CONFIGURATION either 0 or 1 If the value is 1 then the DP024 is configured for restart in case of recovery after a special kind of errors revised The first of revised errors is overheating the error that appears when even one of two thermistor will reach 65 C but disappears when both thermistors will be below 55 C The second error is input voltage is lower than Low Voltage Threshold the error that appears when input battery voltage will drop lower than Low Voltage Threshold but disappears when input voltage will rise above Low Voltage Threshold value more than value of Voltage Threshold Hysteresis The CONFIGURATION value has been saved in EEPROM IF set new value of CONFIGURATION Press two keys E and then type value of either 0 or 1 at finish with Enter You can check acc
6. difficult tasks of operating a computer in a vehicle is power consumption while the computer is OFF Even if your computer is totally OFF Standby state a computer will still consume a few hundred milliwatts needed to monitor computer ON OFF status All power supplies provide 5Vsb 5V standby so that the motherboard can issue at least a PSON signal When the computer is in the suspend sleep mode it will consume even more power because the RAM needs to be powered at all times The power consumption in the suspend mode is few Watts No matter how big your car battery is it will eventually drain your vehicle battery in a matter of days The DP024 is addressing these issues by cutting off the 5VSB rail after a pre defined amount of time timing settings The DP024 monitors battery voltage to protect against deep discharge When battery level drops below predefined value for more than predefined time the DP024 will shut down and re activate only when the input voltage is gt predefined value Of course there is a traditional PC PSU mode setting with no ignition control shutdown logic bypassed and it can be used in non vehicle computer applications INPC DP024 Automotive PSU 2 Input Characteristics Minimum Input Operating voltage 19V 18V for less than 0 01sec Maximum Input Operating voltage 35V 40V for less than 0 01sec Maximum Input Current Sleep Mode 20mA Maximum Input Current Deep Sleep Mode 5mA Range of Adjustable Lower Vol
7. 200 JP6 RS232 Pin Description Pin Wire Color Pin Description Wire Color Jescription l PWR SW L Orange 3 3V Orange 1 CD 2 GND DA SATA BE C Orange e 12 Blue 2 SINCRD JPE T 3 Black 131 GN Block 2 SOUTCTR Description Wire Color 4 Red 14 S Green 4 DR nc nc 5 Black 15 GND Black SG GND Black B Red E GN Block 7 5V Red B S TRT gt ek CTS GND Black El Pink GIR Red 9f NC H2V Yellow 10 Yellow EU 45V Red INPC DP024 Automotive PSU POWER Key optional PSU DP024 In order to connect to 24V vehicle circuit the first you should connect the GND line of the JP1 connector directly to the automotive batteries terminal with heavy gauge wire GND may also be connected with vehicle chassis if desired Then connect the IGNITION pin 2 of JP12 to the switched 24 Volt supply wire ignition circuit or fuse box This will bypass the Startup Shutdown sequence and battery protection At the end connect POWER line of JP1 connector directly to the automotive batteries terminal with heavy gauge wire Apply 24 Volts to IGNITION by turning on the ignition or by flipping a switch and you re ready to go If you use the DP024 as a non vehicle PSU Connect the IGNITION signal to the GND by wire coupling the pins 2 and 3 of the JP1 connector Moreover in order to put your system into run or shutdown state there is the button connected to the motherboar
8. 4 is waiting for ignition signal The user steps into the automobile and turns on the key IGNITION goes HI 12 Volts and as a result the DP024 wakes up from Sleep state The DP024 waits for at least 4 seconds then turns on the 5Vsb rail After another delay more than a second the DP024 sends an ON signal to the motherboard via the 2 wires connected to the JP3 INPC DP024 Automotive PSU 6 and to the motherboard s Power On header The motherboard will turn ON and your system should start booting The Ignition is turned ON during driving Your computer will remain ON playing MP3s doing GPS Navigation etc The automobile goes to the gas station and the driver turns off the key and IGNITION goes LOW The DP024 now starts the Countdown Timer T1 The driver gets back in the car starts the car and the computer keeps playing the MP3s without a hiccup The user then drives home and turns off the car for the night IGNITION goes low and the Countdown Timer T1 starts The DP024 waits for STANDBYDELAY then Countdown Timer T1 expires The DP024 then sends a pulse again over JP3 pins to shutdown the computer The shutdown pulse was successful and the computer turned off Standby The Countdown Timer T2 starts The DP024 waits for SLEEPDELAY then Countdown Timer T2 expires The DP024 then goes to Sleep mode and preserves battery power While in Deep Sleep or Sleep mode the DP024 constantly monitors your car battery voltage
9. INPC DP024 90W Smart PSU for Mini ITX Motherboards to be used in an Automotive 19 35Volt Input Environment ALL INFORMATION IN THIS USER MANUAL IS PRELIMINARY AND SUBJECT TO CHANGE R 0 02 May 2011 DV Industrial Computer Ltd Wide input range 19 35V Suitable for automotive applications Suitable for battery powered applications Complete with start up shut down control user adjusted saved in EEPROM Compatible with most Mini ITX boards equipped with a 20pin ATX connector Long life even at temperature higher than 50 C Silent operation fanless Temperature control Low heat dissipation efficiency over 85 Chassis mountable measurements 39x170x27 Connection via COM port with computer WatchDog timer to supervise the computer by commands through the COM port Notice This device should be attached and tuned by specialized personnel only after familiarizing with current manual Please take a moment and read this manual before you install the DP024 in your vehicle Often rushing into installing the unit can result in serious damage to your DP024 converter computer and probably your car electrical system The DP024 converter has several wires that need to be installed in various places When installing always double check the polarity of your wires with a voltmeter and by sight INPC DP024 Automotive PSU 1 Introduction This manual is intended for firmware release 0 02 The firmware release number is written o
10. STANDBYDELAY value has been saved in EEPROM B set new value of STANDBYDELAY Press keys B and then type value of seconds from 0 to 255 and finish with Enter You can check accuracy of setting by b command get STANDBYDELAY If you set STANDBYDELAY to 0 then the DP024 will switch to StandBy state immediately after circuit IGNITION has gone low cb get counter value of T1 timer Press four keys c b and Enter As a response the DP024 sends current value of T1 timer counter in seconds At the moment when IGNITION goes low while the DP024 is being in PowerOn state T1 timer starts decrementing counter value count down Therefore second command that can be sent with delay of some time will result in another value with difference that corresponds to delay from first command point les get counter value of T2 timer Press four keys c s and Enter As a response the DP024 sends current value of T2 timer counter in seconds At the moment when the DP024 switches into StandBy state T2 timer starts decrementing counter value count down Therefore second command that can be sent with delay of some time will result in another value with difference that corresponds to delay from first command point le get SLEEPDELAY Press three keys e and Enter As a response the DP024 sends current value of SLEEPDELAY initial value for T2 timer in seconds This value should be loaded into counter of
11. When connecting bench power use between 24 to 32 Volts DC to POWER and GND BATTERY terminals for best results The best way to do successful bench testing is to use an adequately sized 24V battery Bringing in the battery from the car or using an extra one that has at least a 10 AmpHour capacity will be sufficient in most cases To aid in bench testing it is enough do not connect IGNITION anywhere The DP024 will operate as dumb PSU with button POWER control Ri resistor 10k simulate load in the ignition line of vehicle Because of this resistor the voltage value will less than 0 5V if the Ignition Key is released INPC DP024 Automotive PSU 4
12. alues of input and output voltages Press three keys Y and Enter As a response the DP022 sends five values of voltages that are separated by symbol slash First value is input voltage nominal value is 13 5V second value is 5Vsb third 12V fourth 5V and fifth 3 3V Values have sent in millivolts You can control voltages on the fly by sending this comand periodically w get current value of counter of WatchDog timer Press two keys w and Enter As a response the DP024 sends current value of counter of WatchDog timer in ticks each tick is 0 3s long IW set current value of counter of WatchDog timer Press two keys W and then type the value of ticks from 0 to 255 each tick is 0 3s long and finish with Enter As a response the DP024 sends symbol slash and just entered value which allows to check accuracy of setting x Connected Fan Examination Procedure Activation NOT SUPPORTED IN V0 02 INPC DP024 Automotive PSU 15 Configuring your operating system to be able for safe shutdown standby with control from the DP024 MS Windows XP for example NOTE In order to realize such control ACPI Advanced Configuration and Power Interface should be used that is not a plug and play function If ACPI is not enabled at the time your Mini ITX motherboard is configured you should enable it before your operating system configuring as shown below Go into BIOS SETUP UTILITY usually you have to p
13. d according to motherboard manual Operation One should to fully appreciate the function of the IGNITION signal pin 2 After 24V supply voltage was applied a battery was connected the DP024 analyses the value of IGNITION signal If the IGNITION signal is higher than 3V then the DP024 will solve a query for the start by sending signal ON to the motherboard simulating button Power On Off push In response the motherboard activates signal for the DP024 power on The computer will start If the IGNITION signal is lower than 0 5V then the DP024 defines this as a query for power off and switches to StandBy state You should eliminate the situation when this voltage is between 0 5 3V as not defined because the DP024 will define mode not stable The DP024 has build in pull up of the IGNITION signal therefore in order to run computer you may leave the IGNITION signal free and do not connect it And vice versa in order to have the computer switched of you must keep the IGNITION signal closed to the ground or GND pin 3 of JP1 or provide the IGNITION signal voltage level less than 0 5V by corresponding current load I e while it is working the DP024 analyses the ignition line of vehicle and controls switching on off logic and powering of the computer Common initial state is the ignition is turned off the IGNITION signal is low about 0 volts the DP024 is in Sleep state LED blinks as 0 03sec On Isec Off The DP02
14. levels preventing deep discharge situations by automatically shutting down until battery levels reach safe levels again If the DP024 has to be used as a regular ATX PSU with button Power On Off of course the DP024 monitors battery voltage to protect against deep discharge and monitors temperature and outputs You can monitor these parameters via serial line equally well as if the DP024 controls the IGNITION signal LED Status Codes Buzzer Status 0 03sec Blink 2sec Off Deep Sleep 0 03sec Blink 2sec Off Sleep 0 03sec Blink 1sec Off StandBy Isec Blink 0 03sec Off PowerOn 0 03sec Blink 4sec Off Sleep Over Temperature 0 03sec Blink 4sec Off Sleep PSU Overload or Fault Input Voltage must go low or r command must be sent to clear a fault Serial Line RS232 Notice The DP024 PSU operates completely independent of computer s software and serial line connection The DP024 that is connected to control computer by serial line operates as a terminal device with fixed connection 9600 8 bit no parity 1 stop bit Usually computer acts as initiator of data INPC DP024 Automotive PSU 7 communication the host The computer can send commands and data to the DP024 The DP024 responds by data block to the most commands sent from computer The DP024 realizes a likeness of ANSI VT100 terminal by means of subset of commands with extensions for WatchDog timer temperature and voltage measureme
15. n the label stick on the MCU inside the device and also this number can be obtained by a proper command sent through the serial line All registered trademarks are the property of their respective owners Overview The DP024 is a fully compliant ATX power supply designed to power a low power system from a single 24V power source As the DP024 does not contain neither electrolytic nor tantalum no polymer solid state capacitors it can be used for long time at 50 C and higher without fundamental loss of reliability This is achieved by only using multilayer ceramic capacitors and other components selection due to reduce self heating The DP024 power supply has an MCU that controls and monitors various functions of the power supply operation Also it realizes voltages monitoring temperature monitoring and communication via COM port with computer As well the MCU realizes a WatchDog timer to supervise the computer by receiving regular commands which are sent through the COM port A LED indicator in the power supply continually reports the power system status and health There are four main working states of the DP024 Deep Sleep Sleep Standby Power On The DP024 has user selectable MCU driven timing settings allowing you to choose various ignition shutdown vehicle computer timing schemes settings These settings are user adjusted and saved in EEPROM These settings allow to overcome the main problems of vehicle computer power supplying One of most
16. nt channel and so on Input from serial line is latched by incoming buffer of 23 byte size String with 24 bytes and more will be wrapped The DP024 starts parsing after receiving of CR Ox0d or LF 0x0a symbol or after overflowing of input buffer 23 bytes Note that parameters such as timeout for the WatchDog timer are in ASCII digits so 12 is represented by the characters 1 and 2 not by a single byte with the value of 12 Also characters are case sensitive so W and w are two different commands WatchDog timer The WatchDog timer is designed to overpass a computer hanging up Usually computer almost never hangs up However if it hangs up and gets stuck usually there is nobody at the site to press the reset or nobody knows where the stuck computer is because there were no problem with it for a long time The WatchDog timer is used just for such situations It automatically restarts the computer that is hung up To restart computer the WatchDog timer closes circuit between pins 1 and 2 of JP2 connector The WatchDog timer is off after starting of the DP024 To switch it on the command WW should be sent and timeout number of ticks one tick is 0 3 seconds should be set by indicating required W which is a value between 0 and 255 The driver program needs to set the timeout periodically to avoid the WatchDog hits and following reset contacts closing Detailed information about WatchDog is given in the further sections
17. nter As a response the DP024 sends numeric value that corresponds to current state The correspondence table looks as following Value Status Explanation 0 PowerOn Switched on all rails have been activated 2 StandBy Switched off only 5Vsb rail has been activated 6 Sleep Switched off any rail has not been activated 7 Deep Sleep Switched off any rail has not been activated 8 Sleep Over Temperature Switched off any rail has not been activated 9 Sleep PSU Overload or Fault Switched off any rail has not been activated t get current value of temperature Press three keys t and Enter As a response the DP024 sends two values of temperature that aree separeted by P symbol slash First value is measured by remote thermistor second is measured by internal DP024 thermistor You can control temperature on the fly by sending this comand periodically lu get STARTUPDELAY Press three keys u and Enter As a response the DP024 sends current value of STARTUPDELAY value of delay for startup timer in seconds that the DP024 make as pause after input voltage 12V has been applied The STARTUPDELAY value is being stored in EEPROM U set new value of STARTUPDELAY Press two keys U and then type value of seconds from 0 to 255 at finish with Enter You can check accuracy of setting by u command get STARTUPDELAY INPC DP024 Automotive PSU 14 v get current v
18. ower buttons gt of lt When I press the power button on my computer gt select one of three choices Standby Hibernate or Power off options Come back to lt Power Option Properties gt window and select lt Portable Laptop gt under lt Power schemes gt and click lt Apply gt Then shutdown the computer click Start and lt Shut Down gt under lt ShutDown gt window Support and warranty Standard Hardware Warranty 1 Year Installation support 30 days via email INPC DP024 Automotive PSU 16
19. ower up the computer and press the DEL key on keyboard Go to the Power tab then into APM Advanced Power Management option and select Enabled Also select Enabled for HDD Go back into Power tab and select S3 State for ACPT Suspend State If an application you have used or motherboard does not support standby mode then select S1 state Save all changes you have made and exit from BIOS setup utility If ACPI is not enabled at the time OS Windows is installed you should install as shown below Click Start then lt Settings gt and lt Control Panel gt then double click lt Add Remove Hardware gt icon as result let Windows automatically detect ACPI if it is enabled at the time your Mini ITX motherboard BIOS is configured Then install the proper drivers you may need the original Windows CD Reboot the computer to detect the newly installd ACPI component Then you have to configure Shutdown or Standby mode of operation for OS Windows as shown below Click Start then lt Settings gt and lt Control Panel gt then double click lt Display gt icon as result access lt Display Properties gt window Click lt Screen Saver gt tab and click lt Power gt button to access lt Power Option Properties gt window Click lt Hibernate gt tab check box x lt Enable Hibernate support gt click lt Apply gt Click lt Advanced gt tab and click down arrow to open choices lt Under P
20. rboards Reset header This will allow the DP024 to reset the motherboard by simulating a reset button press POLARITY MATTERS HERE Connect a 2 pin jumper cable between JP3 and the motherboards Power On header This will allow the DP024 to turn on and off the motherboard by simulating a power button press POLARITY MATTERS HERE JP6 is a 10 pin polarized connector that is used for connection via serial line RS 232 to the COM port of the computer The DP024 uses the RTS CTS hardware handshaking of serial line flow control However the DP024 ignores signal on RTS line assuming that control computer is always ready to receive data Therefore really only four wire link is required SG Signal Ground SIN RD Serial Input Read of data SOUT TR Serial Output Transmit of data CTS Clear To Send Connect a 10 pin flat ribbon cable to COM port connector of your control computer RT1 2 pin connector is used to connect remote 0 4m temperature sensor thermistor Place remote thermistor at CPU heatsink of your computer Connect the ATX Power connectors JP7 JP8 to the motherboard and any peripherals to JP4 JP9 connectors AT THE END Connect the ground IGNITION and 24 Volt supply JP1 The DP024 can be tested in the lab before being installed into the vehicle The picture shown below explains how to do it and is in use for testing and reseach of the DP024 Certain details need to be noted for proper bench testing
21. tage Threshold 18 29V Output Power Characteristics Output Connector ATX Power 20 pin Molex P N 39 01 2200 Maximum Power at 27V Input engine is running Output Rail Current Max Current Peak Regulation lt 5 seconds 5Vsb 6A 8A 3 5V 6A 8A 3 3 3V 6A 8A 3 12V 4A SA 3 12V 0 1A 0 15A 10 Total current on 5Vsb and 5V rails Maximum Power at 25V Input engine is off Output Rail Current Max Current Peak Regulation lt 5 seconds 5Vsb 6A 7A 4 5V 6A 7A 4 3 3V 6A 7A 4 12V 4A 4 5A 4 12V 0 1A 0 15A 10 Total current on 5Vsb and 5V rails Maximum Power at 20V Input engine cranks or deep discharge Output Rail Current Max Current Peak Regulation lt 5 seconds 5Vsb 5A 6A 5 5V 5A 6A 5 IV SA 6A 5 12V 3 5A 4 0A 5 12V 0 1A 0 15A 10 Total current on 5Vsb and 5V rails INPC DP024 Automotive PSU 3 Connection NOTICE Do not connect a Car Battery Charger directly to the DP024 The DP024 has several wires that need to be installed in various places When installing always double check the polarity of your wires with a voltmeter NEVER use the cigarette plug as a power source often the contacts are not capable of delivering high current to your PC Do not connect a Car Battery Charger directly to the DP024 AT FIRST Connect a 2 pin jumper cable between JP2 and the mothe
22. ture C Zu get startUp delay U5 set startUp delay 50s 07255 v get Volatage mV w get Watchdog value W100 set Watchdog value 100tics 07255 gt Bpema noaknroyerna 0 22 15 9600 8 N 1 If you see this list all settings have been made correct and you can continue with study of commands The commands have friendly interface to interact with terminal program NOTICE The commands that start with symbol slash are focused to be used with dedicated programs of course you can use them with terminal program Some of commands answer with asked value but some of commands do not All answers that have started with symbol are tailed with symbol 7 carriage return line feed and prompt symbol gt a display all Press two keys a and Enter As a response the DP024 sends current value of temperature output voltages input voltage value of Trip Threshold Low Voltage contents and initial values of Timers T1 and T2 current state of operating fan revolution values and so on for the moment when the command has been sent INPC DP024 Automotive PSU 11 b get STANDBYDELAY Press three keys b and Enter As a response the DP024 sends current value of STANDBYDELAY initial value for T1 timer in seconds This value should be loaded into counter of T1 timer when IGNITION goes low After that T1 timer starts time countdown The DP024 switches to StandBy state when T1 timer expires The
23. uracy of setting by f command get CONFIGURATION If you set CONFIGURATION to 0 then the DP024 will not restart after recovery and will stay in one of the following states Sleep Over Temperature PSU Overload or Fault till the input voltage is off even over temperature or low input voltage error has been recovered gl get Trip Threshold Low Voltage Press four keys g 1 and Enter As a response the DP024 sends value of Low Voltage Threshold in millivolts The DP024 switches into Sleep PSU Overload or Fault state if input voltage does not exceed Low Voltage Threshold The Low Voltage Threshold value is being stored in EEPROM GI set new value of Trip Threshold Low Voltage Press keys G l and then type value of millivolts from 18000 to 29000 and finish with Enter You can check accuracy of setting by gl command get Lower Voltage Threshold gh get Trip Threshold Low Voltage Hysteresis Press four keys g h and Enter As a response the DP024 sends value of Voltage Threshold Hysteresis in millivolts In case if the DP024 has been switched to Sleep PSU Overload or Fault state and this error was caused by dropping of input voltage below Low Voltage Threshold value and if the input voltage stays less than sum of Low Voltage Threshold and Voltage Threshold Hysteresis the DP024 will stay in Sleep PSU Overload or Fault state If input voltage rises over sum of Trip Threshold Low Voltage and Trip Threshold Low Voltage Hysteresis
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