KD MMI-420-EP User Manual
Contents
1. KX MMI 420 EP Page 1 21 VV LEC MOTOR PROTECTION amp CONTROL TECHNOLOGY KD KE Relay Man Machine Interface 4x20 Display Explosion Proof User Manual KE MMI 420 EP Version 01 01 NE_KX MMI 420_MAN_01_10_FNO01 14 June 2010 NewElec Pretoria Pty Ltd Head Office c o 298 Soutter street amp Maltzan street Pretoria West South Africa 0182 GPS 25 45 12 S 28 09 46 E Http www newelec co za NESW MOTOR PROTECTION amp CONTROL TECHNOLOGY 2 1 2 2 2 3 2 4 2 5 5 1 5 1 1 312 5 1 3 5 2 5 3 5 4 5 4 1 5 4 2 5 4 3 5 4 4 5 4 5 5 4 6 3 9 5 6 6 1 6 2 6 3 6 4 6 5 7 1 7 2 Page 2 21 CONTENT ABSTRACT SPECIFICATIONS Electrical Requirements of the MMI Mechanical Properties of the MMI Communication Link of the MMI Menu structure with Unit of the MMI Environmental Rating DEFINITIONS AND TERMINOLOGY FUNCTIONAL DESCRIPTION OPERATING INSTRUCTIONS Getting Started Charging the Battery USB Memory Stick Preparation Connecting the MMI to the Relay Navigating Through the Menus Monitoring Actual Data Change or Viewing Settings Change in MMI memory slots Copy MMI memory slot to MMI memory slot Upload relay settings to MMI memory slot Download MMI memory slot to relay Upload relay settings to USB stick Download USB memory stick to relay Retrieve and Uploading Event Records Trouble Shooting Frequently Asked Questions DIAGRAMS Physical Layout of Complete2. Thermal capacity reset level 10 100 default 70 e Consec Start Lim Consecutive starts limit 1 3 e Run Stall T Level Run stall Trip Level 110 300 e Run Stall H Time Run stall hold off time 1 200s e U C Trip Undercurrent trip Enable Disable e Under Volt Trip Enable Disable e Over volt Trip Enable Disable e Volt Symt Trip Voltage symmetry trip Enable Disable e Fail Safe Enable Disable e Auto TC Reset Enable Disable NESW LEC MOTOR PROTECTION amp CONTROL TECHNOLOGY KX MMI 420 EP Page 7 21 Unbalance Trip Current unbalance trip Enable Disable Phase Rot Trip Voltage phase rotation trip Enable Disable Short Circ Trip Short circuit Trip Enable Disable Single phase trip Enable Disable Running Stall T Run stall trip Enable Disable Sel U C for Trip Undercurrent Power factor selected for trip Enable Disable Earth leakage Trip Earth Leakage Trip Enable Disable Low Pass Filter Enable Disable Iso Lockout T Isolation lockout trip Enable Disable Frequency Trip Frequency monitoring Enable Disable Auto TC Reset Cal Enable Disable Starts Per Hour Enable Disable Volt Phase Rev Enable Disable Vectorial Stall T Vectorial stall trip Enable Disable Table 1 Mask 0 amp 1 000 X 001 X X 0 1 Table 1 Mask 2 amp 3 010 X 011 X X 0 1 Table 1 Mas
3. 6 5 Mechanical Drawing 146 00 mm m 94 00 mm 302 00 mm 65 00 mm 32 00 mm 40 00 mm 4 137 00 mm NESW LEC MOTOR PROTECTION amp CONTROL TECHNOLOGY KX MMI 420 EP Page 21 21 7 ACCESSORIES All accessories are explosion proof certified and it is compulsory to be used for safety reasons and reliable operation All accessories are included when a new KD MMI 420 EP is pur chased In case of lost or damage accessories can be reordered separately 7 1 NeweElec Li Ion battery charger Order information NewElec Li Ion battery charger BAT0007 7 2 NewElec USB memory stick Order information NewElec USB Memory Stick CAB0028 00000 NESW LEC MOTOR PROTECTION amp CONTROL TECHNOLOGY
4. White phase voltage 0 1200V Vb Blue phase voltage 0 1200V EL Earth leakage 0 3000mA Unbalance Current unbalance 0 100 NESW LEC MOTOR PROTECTION amp CONTROL TECHNOLOGY 2 4 3 2 4 4 2 4 5 2 4 6 KX MMI 420 EP Page 5 21 Volt Sym Voltage symmetry 0 50 Power Factor Power factor expressed as a 0 100 Iso Lock Isolation lockout expressed in k Ohm 0 200kOhm Relay 1 Relay 1 operation status energized de energized Relay 2 Relay 2 operation status energized de energized Relay Settings 2 level MMI Mem Slot Copy Slot Slot DwnLd Slot KX UpLoad KX Slot DwnLd USB KX UpLoad KX USB Faults 2 level Fault history retrieved from relay data base View Nr Fault number x of 60 on display Status Actual fault caused by real current and voltage or sim fault caused during simulation of current voltage power factor and earth leakage current Type Trip condition Any one of the trip flags which is applicable at the time of the trip DT Date and time stamp of fault record Run hour Motor running hours at the time of the trip expressed in hours Current Max current in at the time the trip took place 0 999 Voltage Minimum phase voltage at the time of the trip 0 1200V Contact R T Contact release time or time to clear fault expressed in ms 0 1000ms Events 2
5. can be found under the settings menu of the MMI Range checking of settings is done during editing 5 4 1 Change in MMI memory slots After selecting MMI memory the MMI will prompt the operator to select a memory slot 1 to 4 After the selection has been made the MMI will display all the settings of the selected memory slot When finding the setting to be altered the enter key has to be pressed in order to alter the setting A flashing cursor indicates that the setting is ready to be altered The enter key must be pressed to confirm the change while the reset key will restore the previous value 5 4 2 Copy MMI memory slot to MMI memory slot MMI memory slot 5 is by default the memory slot where the relay settings will be uploaded to when the MMI connects with the relay When selecting copying memory slot the MMI will prompt the operator to select from which memory slot 1 to 5 the data must be copied from After the operator selects a memory slot the MMI will then prompt the operator to select a destination memory slot 1 to 4 After selecting a memory slot the MMI will prompt the operator for confirmation to overwrite destination memory slot NESW LEC MOTOR PROTECTION amp CONTROL TECHNOLOGY KX MMI 420 EP Page 13 21 5 4 3 Upload relay settings to MMI memory slot When the operator selects to upload relay settings the MMI will prompt the operator to select the destination memory slot 1 to 4 The MMI will then prompt th
6. stick Keyboard Liquid Crystal Display 4lines x 20characters vy Infrared Interface IrDA NESW LEC MOTOR PROTECTION amp CONTROL TECHNOLOGY 6 4 Menu Layout Page 19 21 MAIN MENU 1 Actual Values 2 Relay Settings 3 Faults 4 Events 5 MMI Settings 6 Relay Clock RT C 7 Relay Info v 1 amp Un PB amp D 9 1 ACTUAL VALUES I Load TC level used Vlev Vr Vw Vb EL Unbalance Volt Sym Power factor Ioso Lock 10 Relay 1 status 11 Relay 2 status 2 1 2 2 P gt 2 4 2 5 2 6 2 SETTINGS MMI Mem Slot Copy Slot Slot DwnLd Slot gt KX UpLoad KX Slot DwnLd USB KX UpLoad KX USB 3 FAULTS 3 1 View Nr 3 2 Status p 3 3 Date amp Time 3 4 Run Hr 3 5 Current Max 3 6 Voltage Min 3 7 Contact R T KX MMI 420 EP 5 MMI SETTINGS 5 1 Auto Scroll gt 5 2 Backlight Auto On 5 3 Contrast 5 4 Brightness 4 EVENTS 4 1 View Nr 4 2 Status 4 3 Date amp Time Db 4 4 AlarmFlags 4 5 Trip Flag 4 6 Run Hr 4 7 Current Max 4 8 Voltage Min 4 9 Contact R T 6 RELAY CLOCK gt 6 1 Date 6 2 Time 7 RELAY INFO 7 1 Start Up Cntr gt 7 2 Trip Cntr 7 3 Motor Run Hrs 7 4 Drv Description 7 5 Drv File ID NESW LEC MOTOR PROTECTION amp CONTROL TECHNOLOGY KX MMI 420 EP Page 20 21
7. FAT32 file system 512 MB cache Always insert or remove USB memory stick when KD MMI 420 EP is powered down Why does it take a such long time to upload the events e Due to the amount of events and the board rate of 19200 bits per second NESW LEC MOTOR PROTECTION amp CONTROL TECHNOLOGY KX MMI 420 EP Page 15 21 e Future devices will be looked at to improve the rate of data exchange What steps have to be taken to open the event or fault file in a spreadsheet or word processing application e Find the file ID or serial number you are looking for on the USB memory stick e Right click on the file e Go down to Open With e Select Choose Program e Select your favorite spreadsheet or word processing application e Click OK e Windows will remember the last application that you used to open the file e You can still open the file with a different application in the same way Can the file be viewed in a LINUX environment e Yes the file can be viewed in LINUX with a text editor or spreadsheet application Will a LINUX format works on the USB memory stick e As long as the USB memory stick is formatted with a FAT32 file system the KD MMI 420 EP USB driver will pick up the USB memory stick Can the USB memory stick be unplugged at any time e No Turn off the KD MMI 420 EP before inserting or removing the USB memory stick This could lead to damage of the file system of the USB memory stick Ift
8. Instrument Layout of the MMI Front Panel Block Diagram of Instrument Menu Structure Mechanical Drawing ACCESSORIES NewElec Li Ion battery charger NewElec USB memory stick KX MMI 420 EP Page op RER ER R O 10 11 11 11 11 11 12 12 12 12 12 13 13 13 13 13 13 16 16 17 18 19 20 21 21 21 NESW LEC MOTOR PROTECTION amp CONTROL TECHNOLOGY KX MMI 420 EP Page 3 21 1 ABSTRACT The KD MMI 420 EP KD Relay Man Machine Interface 4x20 Character Display is a portable rechargeable battery powered unit designed to function together with the KD or KE motor protection relays It is advisable to read this manual in conjunction with KD and KE user manual The display unit MMI is intrinsic safe and explosion proof certified suitable for use in potential dangerous environments for example coal mines The purpose of this unit is to provide a front end facility man machine interface between the operator and the motor protection relay It is capable to monitor and adjust the motor protection relay data The relay data consists of settings faults events and actual data Settings can be adjusted as a batch or individually Communication between the motor protection relay and the display unit MMI is galvanic isolated and achieved via an infrared IrDA serial link NESW LEC MOTOR PROTECTION amp CONTROL TECHNOLOGY 2 1 2 2 2 3 2 4 2 4 1 2 4 2 KX MMI 420 EP Page 4 21 S
9. PECIFICATIONS Electrical Requirements of MMI The instrument is powered by a rechargeable Li Ion battery pack Operating time between charges 10 hours Battery charging time 5 to 6 hours Charger requirements Input 230Vac 8 Watt Output 12Vdc 500mA Fuse Slow blow 1 Ampere 5mm x 20mm Mechanical Properties of MMI Physical dimensions 325mm x 175mm x 135mm Mass of unit 1 85kg Size of display on unit 50mm x 20mm character height 5mm Display type 4 lines by 20 characters liquid crystal display LCD with adjustable back lighting Size of characters in display window 5mm Keyboard diaphragm type 6 keys up down left right enter and reset menu Indication lights Light emitting diodes 6 LEDs relay communication in service trip battery fault and charging Communication Link of MMI Infrared IrDA Communication speed 19200 Baud b s Maximum distance between units with no optical interference Less then 1 meter Menu Structure with Unit Ranges of MMI Main Menu primary menu 1 level 1 gt Actual values 2 gt Relay settings 3 gt Faults 4 gt Events 5 gt MMI Settings 6 gt Relay Date Time Real Time Clock 7 gt Relay Info Actual Values 2 level Load Load current expressed in 0 999 TC level Thermal capacity used expressed in 0 100 Vlev Maximum Phase voltage 0 1200V Vr Red phase voltage 0 1200V Vw
10. PROTECTION amp CONTROL TECHNOLOGY KX MMI 420 EP Page 12 21 The communication distance between the IrDA devices must be less then 1 meter When communication is established the relay communication LED on the MMI will be solid on The in service LED indicates the motor s running status and the trip LED indicates the motor s fault status The motor will be switched off in the event of a trip condition 5 2 Navigating Through The Menus Navigating though the menus is done by using the direction buttons enter key and reset key e UP button It will scroll up in a menu or when in edit mode increment the parameter value at the position of the cursor e DOWN button It will scroll down in a menu or when in edit mode decrement a parameter value at the position of the cursor e LEFT button It will allow in edit mode to go left when editing a parameter value e RIGHT button It will allow in edit mode to go right when editing a parameter value e ENTER button It will allow going into a sub menu or confirm a change that was done to a parameter value while in edit mode e RESET MENU button It will allow one level backwards in the menu structure or reset the value that was changed while in edit mode 5 3 Monitoring Actual Data When auto scrolling is enabled the MMI Settings menu the display will automatically return after five minutes of no keyboard interaction to the Actual menu 5 4 Change or Viewing Settings All features below
11. e operator to confirm the the overwriting of the designated memory slot The MMI will then proceed to upload the relay settings 5 4 4 Download MMI memory slot to relay When the operator selects to download MMI setting to the relay The MMI will prompt the operator to select the memory slot 1 to 4 to be downloaded The MMI will then prompt the operator to confirm the the overwriting of the settings in the relay The MMI will then pro ceed with download of the relay settings 5 4 5 Upload relay settings to USB stick When the operator selects to upload the relay settings to the USB memory stick the MMI will start uploading the relay settings to the MMI memory slot 5 The MMI will then after wards download the relay settings to the USB memory stick The unique relay ID or serial number will be used as the file name what ever is available The file extension will be filename set 5 4 6 Download USB memory stick to relay When the operator selects to download the relay settings from the USB memory stick the MMI will display a list of files that are available on the USB memory stick After the operator selected a file the MMI will ensure that the file is valid The MMI will prompt the operator to confirm the overwriting of the settings of the relay The MMI will the proceed with downloading of the relay settings 5 5 Retrieve and Uploading Event Fault Records To retrieve event records the operator has to go to events menu When arrivin
12. ery when the motor starts up 0 65535 e Trip counter Increment every time when a trip occurs 0 65535 e Running hours Increment every hour the of motor operation 0 65535 Drive description Description of drive 20 characters e Drive file ID Unique file name associated with the drive regarding event fault and setting files Settings 3 level e TC Class Select Thermal Curve Class 5 40sec e Maximum Load Set Motor full load setting 10 100 e Voltage Select Supply line voltage level 110V 400V 525V or 1050V V Sym Trip Level Voltage symmetry trip level 50 100 e Unbal Trip Level Current unbalance trip level 0 50 e Unbal Trip Delay Current unbalance trip delay 1 10 sec e U C Trip Level Undercurrent trip level 10 99 e U C Restart Delay Undercurrent restart delay Manual 10s 1 h 3h 6h e U C Trip Delay Undercurrent trip delay 1 10 sec EL Trip Level Earth leakage trip level 0 3000 mA EL Trip Delay Earth leakage trip delay 100ms 1sec in steps of 50ms IDT e EL Curve Select Earth leakage curve select Instantaneous Definite Time Inverse Definite Minimum Time e Starts per hour Starts per hour allowed 0 30 e U C Startup Delay Undercurrent start up delay pump priming time 0 200s e Power Fact Level Power factor trip level setting 0 100 e TC Reset Level
13. eys are used to select enter and reset return to the menu respectively Liquid Crystal Display unit It is a four line by twenty character display with back lighting and contrast control The display is used to display actual values and settings Infrared serial port IrDA It is the serial communication interface between the relay and MMI The intention of the IrDA interface is to provide galvanic isolation between the relay and the MMI This enable the operator to download and upload data safely with minimal risk of an explosion in hazardous environments USB drive It is an interfaces only to the USB memory stick which is used for mass data storage The memory stick is plug able and formatted according to the FAT32 file system This feature allows data to be viewed and edited in the office on a PC or Laptop equipped with a USB port NESW LEC MOTOR PROTECTION amp CONTROL TECHNOLOGY KX MMI 420 EP Page 11 21 5 OPERATING INSTRUCTIONS A Warning Use only NewElec explosion proof certified devices to ensure safe and reliable operation 5 1 Getting Started 5 1 1 Charging the Battery Before any operation could be performed ensure that the battery pack is properly charged Use the Li Ion battery charger to charge the battery pack The following conditions can be indicated during the charge cycle by the battery fault and charging LEDs Battery Fault LED Charging LED Condition Description Flas
14. g at the events menu the operator has to select the amount of events required 10 2000 When the enter key is pressed the MMI will begin to upload events to MMI memory After events are uploaded an attempt will be made by the MMI to download the events data to the USB memory stick Fault records are retrieved and uploaded in a similar way except for the fact that all the faults 60 will be retrieved and uploaded on request The unique relay ID or serial number will be used as the file name what ever is available The file extension will be filename flt for faults and filename evt for events 5 6 Trouble Shooting Frequently Asked Questions Why does the KD MMI 420 EP get stuck on the welcome screen e It could be that the USB drive is not functioning properly NESW LEC MOTOR PROTECTION amp CONTROL TECHNOLOGY KX MMI 420 EP Page 14 21 Why does the COMMS Green LED not come on e Make sure the green light is on at both IrDA boxes e Make sure that there is a clear path between the IrDA devices e Make sure that the distance is shorter than a meter Why does the KD MMI 420 EP struggle to read the files e Make sure the file name being read is not longer than 8 characters e Make sure that the USB memory stick is formatted with the FAT32 format 512MB cache e Cycle the KD MMI 420 EP power and try again e Make sure that the green LED is on next to the USB memory stick e If still failing it could mean that
15. he USB memory stick becomes corrupted it has to be again formatted FAT32 NESW LEC MOTOR PROTECTION amp CONTROL TECHNOLOGY KX MMI 420 EP Page 16 21 6 DIAGRAMS 6 1 Physical Layout of the Complete Instrument Order number FPR0220 1 Liquid crystal display 4 x 20 5 Fuse Slow blow 1 Ampere 2 Keyboard 6 Infrared interface unit IrDA 3 Indication lights LED 7 USB Memory stick 4 On Off switch 8 Li lon battery charger NESW LEC MOTOR PROTECTION amp CONTROL TECHNOLOGY KX MMI 420 EP Page 17 21 6 2 Layout of the MMI Front Panel 10 11 12 1 Liquid display unit 4 x 20 7 Left key 2 Upkey 8 Communication indication 3 Enter key 9 In service motor run indication 4 Right key 10 Trip indication 5 Reset Menu key 11 Faulty battery indication 6 Down key 12 Charge indication Etec MOTOR PROTECTION amp CONTROL TECHNOLOGY Page 18 21 6 3 Block diagram of MMI display unit KX MMI 420 EP Battery pack D Battery charger P gt i Ton y USB Memory Stick Micro controller Unit with Interface Gg Memory V Drive Flash EEPROM and RAM y Memory
16. he motor It is based on the size construction material winding isolation and cooling properties of the motor When thermal capacity reaches a value of 100 it indicates that the motor has risen to it s maximum temperature and any further temperature rise will cause damage to the motor USB Universal Serial Bus USB drive USB interface module for only the USB memory stick NESW LEC MOTOR PROTECTION amp CONTROL TECHNOLOGY KX MMI 420 EP Page 10 21 4 FUNCTIONAL DESCRIPTION The KD MMI 420 EP is packaged in a plastic toolbox and consists of the following function blocks e Rechargeable Li Ion battery pack e Micro controller e Keyboard e Liquid crystal display unit LCD e Infrared serial port IrDA e USB drive Rechargeable Li Ion battery pack It is the power source of the portable MMI display unit The battery has to be charged with a NewElec Li Ion battery charger before the MMI display unit could be used Battery endurance and charging times are listed under specifications Micro controller It is the core of the system It provides processing power and enables all the peripherals to function together as a unit The micro controller has on board memory for program code settings and temporary data Keyboard It consists of six keys The operator uses it to select and adjust the data of the motor protection relay Four keys are used for scrolling up down left and right respectively The remaining two k
17. hing Off Battery is overheated no charging is performed Off On Flashing Battery is busy charging Off Off Battery fully charge 5 to 6 hours 5 1 2 USB Memory Stick Preparation Important notes regarding USB memory stick preparation for data exchange e Use only explosion proof certified NewElec memory sticks e The memory stick needs to be formatted according to the FAT32 system 512MB cache Formatting is done on the USB port of the PC or the Laptop Use Windows Explorer to perform the task e Insert or remove the memory stick only when the MMI is powered down Removal of the memory stick while the MMI is busy may result in data corruption A green flash ing LED next to the USB connector of the MMI indicates read and write activity e Always ensure that the file names are not longer then eight characters for example 12345678 set e The MMI has limited file functionality The amount of file names is limited to 65535 names No provision is made for renaming or deleting a file e Fault filename flt and event filename evt files can be viewed with MS Excel or any other equivalent software e Settings filename set files can be viewed with the front end software of the KD or KE relay 5 1 3 Connecting the MMI to the Relay There are three connection points were the KD Relay or KE Relay can connect with the KD MMI 420 EP e KD I2C FLED IrDA panel e KD RDU 420 IrDA panel e KD IrDA module NESW LEC MOTOR
18. k 4 amp 5 100 X 101 X X 0 1 Table 1 Mask 6 amp 7 110 X 111 X X 0 1 Table 1 Input A Input pointer see 2 4 10 Table 1 Input B Input pointer see 2 4 10 Table 1 Input C Input pointer see 2 4 10 Table 2 Mask 0 amp 1 000 X 001 X X 0 1 Table 2 Mask 2 amp 3 010 X 011 X X 0 1 Table 2 Mask 4 amp 5 100 X 101 X X 0 1 Table 2 Mask 6 amp 7 110 X 111 X X 0 1 Table 2 Input A Input pointer see 2 4 10 Table 2 Input B Input pointer see 2 4 10 Table 2 Input C Input pointer see 2 4 10 Table 3 Mask 0 amp 1 000 X 001 X X 0 1 Table 3 Mask 2 amp 3 010 X 011 X X 0 1 Table 3 Mask 4 amp 5 100 X 101 X X 0 1 Table 3 Mask 6 amp 7 110 X 111 X X 0 1 Table 3 Input A Input pointer see 2 4 10 Table 3 Input B Input pointer see 2 4 10 Table 3 Input C Input pointer see 2 4 10 Timer A Time Out 0 3000s Timer A Start In Input pointer see 2 4 10 Timer A Reset In Input pointer see 2 4 10 Timer B Time Out 0 3000s Timer B Start In Input pointer see 2 4 10 Timer B Reset In Input pointer see 2 4 10 Start Motor hh mm Stop Motor hh mm Relay 2 Input Sig Input pointer see 2 4 10 NESW LEC MOTOR PROTECTION amp CONTROL TECHNOLOGY 2 4 10 Input Pointers Page 8 21 KX MMI 420 EP It is signals that can be routed to the inputs of
19. level Event history retrieved from relay data base View Nr Event number x of 2000 on display Status Event type alarm trip or setting adjustment DT Date and time stamp of the event record Alarm Flags Alarm condition at the time of the recording of the event Trip Trip condition at the time of the event recording Run hour Motor running hours at the time of the recording of the event Current Maximum current at the time the event was recorded Voltage Minimum phase voltage at the time of the event recording Contact R T Contact release time or time to clear fault expressed in ms 0 1000ms MMI Settings 2 level System settings only for the MMI not applicable for the relay Auto scroll Auto scroll the actual values after 5 minutes of no key activity Enabled Disabled NESW LEC MOTOR PROTECTION amp CONTROL TECHNOLOGY 2 4 7 2 4 8 2 4 9 KX MMI 420 EP Page 6 21 e Back light auto on Back light will be turned off after 5 minutes Enabled Disabled e Contrast Contrast adjustment of the LCD images 0 100 e Brightness Brightness adjustment of the LCD back light 0 100 Relay Data Time 2 level e Date Relay date adjustment of the real time clock of the relay e Time Relay time adjustment of the real time clock of the relay Relay Info 2 level Statistical and user data to manage the drive Start up counter Increment ev
20. the USB stick is not working properly Can faults events be downloaded from KD MMI 420 EP to the USB memory stick without being connected to the relay e Only when faults or events have been successfully uploaded from relay to the KD MMI 420 EP If so follow the next four steps e Break the connection between the Relay and the KD MMI 420 EP e Go into events faults again e Say yes to load the last events faults loaded from a relay e The writing procedure will start again and the file will be saved to the last FILED ID loaded from a relay Can the data be saved under a custom user file name different file name e Due to limited memory space in the micro controller a fully functional DOS could not be implemented to give the facility to delete rename and create files e Future devices might have these features Why does KD MMI 420 EP not seeing all the files e The KD MMI 420 EP is limited in the amount of files it can see on the USB drive It is due to code memory limitation e Only a total of 65535 files can be viewed e Feature devices will be looked at to overcome this limitation Why is the screen not reading clearly e Adjust the brightness in the MMI SETTINGS menu Why is the PC not detecting or reading any files on the USB memory stick e The USB stick could have got corrupted when removing the USB stick while the KD MMI 420 EP was still busy with the drive Format the USB memory stick according to the
21. the logic functions timers and relay 2 Zero 0 One 1 InService VoltPresentF OverCrnt_af ShortCirc_af RunStall_af I Unbal_af SinglePhase_af EarthFault_af EarthLeak_af MinLoad_af OverVolt_af UnderVolt_af VoltSym_af HiFreq_af LoFreq_af IsoLockOut_af OverCrnt_tf ShortCirc_tf RunStall_tf I Unbal_tf SinglePhase_tf EarthFault_tf EarthLeak_tf MinLoad_ tf OverVolt_tf UnderVolt_tf VoltSym_tf HiFreq_tf LoFreq_tf IsoLockOut_tf PhaseRot_tf StartsPerHr_tf Timer _A Timer A Timer _B Timer B RTClock RTClock LogicFunc_1 LogicFunc_1 LogicFunc_2 LogicFunc_2 LogicFunc_3 LogicFunc_3 Restart FrozenContact PLC_Inp0 PLC_Inp1 Tcap gt THold 2 5 Environmental Rating e Explosion proof certified e Temperature range 0 C to 60 C e Humidity lt 85 NESW LEC MOTOR PROTECTION amp CONTROL TECHNOLOGY KX MMI 420 EP Page 9 21 3 DEFINITIONS AND TERMINOLOGY EEPROM Electrical Erasable Programmable Read Only Memory non volatile Flash memory Similar to EEPROM only block write non volatile Galvanic isolation It is the principle of isolating functional sections of electrical system so that charge carrying particles cannot move from one section to another i e there is no electrical current flowing directly from one section to the next Energy and or information can still be exchanged between the sections by other means however such as b
22. y capacitance inductance electromagnetic waves optical acoustic or mechanical means In service When the current rise above 10 of full load current it is assumed that the motor is running Intrinsic safe It is a protection technique for safe operation of electronic equipment in explosive atmospheres The concept was developed for safe operation of process control instrumentation in hazardous areas The theory behind intrinsic safety is to ensure that the available electrical and thermal energy in the system is always low enough that ignition of the hazardous atmosphere cannot occur IrDA Infrared serial data transmission link LED Light emitting diode It is used as visual indicators MMI Man machine interface It is a tool to monitor actual values fault and event records It is also used to adjust the relay settings In retrospect it is a more robust alternative although not as comprehensive for a laptop computer with relay front end software Motor protection It is an intelligent computerized unit monitoring an electric motor s relay current and voltage supply In case of overloading phase lost etc the power supply of the motor will be interrupted by the protection relay to prevent damage to the motor Slot Memory space allocated to keep settings data for relay configuring purposes Thermal Capacity It is a value expressed as a percentage to indicate the thermal condition used of t
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