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TW1-B Computing Head User Guide

1. 10 2 3 Connection to Host nan 10 2 4 Euro Er 222222 ee eee e eee ee cess eee nese ee esse eee n ee eee eeee m m m 10 TROUBLESHO OTAN Gr rrr LLLLLLTTTL 11 3 1 Fatal errors ee eeeeeee seen 11 3 2 Non fatal errors 11 3 3 Error review table Errore ll segnalibro non definito PROCEDURES mmm mm m m LL Emme 15 4 1 General totalizer reading 15 4 2 Computing head setup 16 4 2 1 Simple parameters 20 4 2 2 Parameters for volume compensation to temperature 20 4 2 3 Complex parameters 20 4 2 4 Password cece sees sees esse sees esse sees sees m 23 4 2 5 Price change 25 4 3 Metric office procedure 26 4 3 1 Adjustment factor memory 26 HARDWARE CUSTOMISING
2. a 30 Ph0olo 6 Secondary display uuu muq m 30 Photo 7 Abnormality signalling device snaa asses 31 Ph016 8 MEDION cio 31 Photo 9 Identification plate on electronic computing head TW1 38 Photo 10 Computing head CPU TW1 B and TW1nA B a a 40 Photo 11 Display of computing head TW1 B and TWINA B front view 40 Photo 12 Display of computing head TW1 B and TW1NA B rear view 40 Photo 13 Display for computing head TW1 B and TW1nA B rear view neon tube backlit version 40 ewo C D Total pages 05 August 2011 1 TECHNICAL DESCRIPTION The TW1 B electronic computing head is designed to operate on single nozzle fuel dispens ers One or two sided display systems can be used It can supply in both Euro and litre sys tem pre setting lt can communicate with a Host sending data concerning the refuelling dur ing the process and or at the time of the device 1 1 Structural specifications The computing head is made up of MM a CPU board complete with power supply and communication interface The board is
3. Display 1 p u LILICILI Display 2 Pp d Faillure Output 4x4 Keyboard 0000600000 Keyboard interface ilii Type No Total pages EW055 601 05 August 2011 Lay 7 2 High Voltage connections The computing head provides voltage free contacts that can direct resistive and or induction loads with the following specifications Max voltage 270Vca Depending on output devices used Relay Standard Max current 3A Solid state devices Atex non sparking Max current 1A Terminal Board TB6 e N d in thi E Jo 5 Not used in this version 4 EV Blk 3 EV Lf 2 Motore Power Links INI gt Power supply of solenoid valves 1 Common Hydraulics gt 230Vac or 24Vac Field Links Display Links Type No Total pages EWVOB5 601 C D 05August2o1 A Terminal Board TB7 Pd Power Links Display connection L Terminal Board TB8 Power Links Display Links Type No EW055 601 LV connections Y x E D oO LL am 213 Green Lamp 2 Red Lamp O 3 1 Lamp common e ry TB7 Lamp Power supply 230Vac o 24Vac 3 Gnd 2 Neutral 1 Phase Y Y y 230Vac power supply Total pages D 5 August 2071 8 IDENTIFICATION OF TW1 B and TW1nA B COMPUTING HEAD A product identification data plate as shown in the figure below is provided
4. na nns snas rasan aa 5 Figiiie2 Maxi m CIS a CO MAMMA IN EE ER Oc o Po o OU UE OO o 6 Figure 3 Dispensing start up SCQUCIICE 1 ccccsccecccnseseccnsauseccnscneecnsuseessausecenacuesensauauessausesensauesensausesuacasesensauesessans 7 Figure 4 Example of pre setting 5 006 a s 8 Figure 5 Example of bre setting TOL esiti iii A A AAN AAA 8 leis ig Re O OVO erica caidos iio 9 Figure 7 Temporary conversion of sale price into Euro a n nna 10 Figure 8 Display Select procedure ssssuuiiiiiisssseeiiiiiisssssseea aene enne n awapyuQanoasuququspalayawqukpuahiwqaaappayqaswqahudpaqipinq 15 Figure 9 Allotting setup buttons a saa asas nsns 15 Figure 10 General totalizer display Litres nhanh nnne nnn nnha anas sss s aaa asas sss sana 16 Figure 11 Entering Setup password nsn rra nro saa asas s assa aa asas assa asas nnns 16 Figure 12 Request to set Jumper JP2 sss sa agas asas saa asas sss a aaa assa nna 16 Figure 13 Display of some setup parameters nhanh n sna anre sa aas n ssa a ann sna
5. 28 OPTIONS e nn 30 6 1 4X4 field keypad 30 6 2 12 digit on 2 line display 30 6 3 Abnormality signalling device 31 6 4 I O expansion device 31 ELECTRICAL CONNECTIONS rrrr 32 7 1 Low Voltage connections 32 7 2 High Voltage connections 36 IDENTIFICATION OF TW1 B AND TW1NA B COMPUTING HEAD 38 MECHANICAL MOUNTING rr 39 SEALING PROCEDURE FOR THE TW1 B AND TW1NA B COMPUTING HEAD 40 10 1 CPU sealing plan 40 10 2 Display sealing plan 40 Type No Total pages EWOSS 601 C D 40 August 2 LIST of figures Figure 1 Diagram of electrical connections
6. Photo 12 Display of computing head TW1nA B rear view Photo 11 Display of computing head TW1 B e TW1nA4B front view Both the right hole and the left hole can Lead seal that pre vents extraction of the display connec tion cable be used without dis tinction Remarks The spiral that prevents removal of the enclo sures CPU and Display from the dispenser must be fixed to a part that cannot be moved Photo 13 Display for computing head from the dispenser TW1 B and TWinA B rear view neon tube backlit version Type No Total pages EWOSS 601 C D D0O5August201
7. 1 AutMan _ f Card EE Display 1 Display 2 a d NOOO E Dopod ERE EEE H aono aono Abnormality OOOO MUU alarm device 4x4 Keyboard ES N Keyboard interface EM 00060960 Figure 1 Diagram of electrical connections Type No Total pages EW055 601 C D 05August 2011 4 2 FUNCTIONAL DESCRIPTION 2 1 Display The TW1 B computing head can be used with single nozzle fuel dispensers Data is always displayed as follows 6 digit display for sale price 5 digit display for the dispensing volume and 4 digit display for unit price TOTAL AMOUNT DELIVERED FUEL UNIT PRICE Figure 2 Maximum displayed 25 mm high backlit LCD displays The backlighting system is formed of a PCB carrying a LED matrix it is mounted on the back of the metal enclosure and emits a flooded green light It is also possible to use a neon tube system or the lighting of the dispenser itself 2 22 Description of operating sequences When switched on the computing head performs some checks EPROM it checks the EPROM CRC and compares it with the data shown on the program Q RAM it checks the writing and reading capability of the data RAM EEROM it checks the congruence of the data shown in EEROM DISPLAY it checks the display connection status Q RX IX presence of active connection to Host DATA COMPLIANCE conformity of the dat
8. To use the outputs in environments that pose a hazard to the l O expansion device a flat ca ble can be used to connect an analogue field interface like the one described above S6 3 with the following specifications 9 Maximum voltage 2 0Vca or 350Vdc 9 Output current depending on device used 3A Relay Standard 1A Solid state devices Atex non sparking Type No Total pages EWVOB5 601 C D 05August2o1 T ELECTRICAL CONNECTIONS 7 1 Low Voltage connections In general all tests carried out using micro switch or buttons are normally open and must close at OV when used In particular Q Nozzle contact open when nozzle is inserted closed when nozzle is extracted Q9 Tank level contact_____________ changeable in setup Fume recovery alarm contact _______ as above instead of Tank level Manual automatic contact closed in manual open in automatic Q Pre setting buttons ____ normally open closed in activation Q Expected pulser ____ Shaft encoder type 01 09 ELTOMATIC Power supply voltage 4 5 25V current per channel 60mA outputs low active pulses 2x100xlitre WARNING CAUTION E The cable connection diagrams shown be I low do not waive the installer from conformity to Terminal Board TB1 the local laws The installer shall also comply with safety regulations in place for the type and specifications of the application particularly in electrical constructions
9. of error simulation The simulated errors are shown in the ERROR CODES table 3 3 To highlight the current simulation status the computing head switches on all the points available on the unit price bar and the two external points on the dispensed volume bar For At this point whenever the nozzle is extracted dispensing begins an error is simulated and as a result the control device shuts off supply as soon as it detects the fault The fault code is displayed on the unit price bar Figure 32 Exit from Procedure of error simulation Figure 33 Passage from dispensing to shut off during error simulation phase Type T No Total pages EWVOB5 601 C D 05August2o1 5 HARDWARE CUSTOMISING There are three selectors called JP on the CPU located inside the enclosure and protected by a metric lead seal which can be used to change the function of the computing head as fol lows o JP1 available for future applications JP2 Enables to perform setup operations Open dispensing normal Closed enabled for setup JP3 Forces the computing head to use parameters consistent with Euro despite the current setup Open uses the Setup values Closed uses the congruent Euro values xs AN IIS S yo d ener Preis 8295 P xw asm em m s T v B DE aaa 34 4 id Me DEI ay vad N k 87 Pis it N bii HI I E 3 52588 th AA m i abarcan ES 14 ob Y L EP ke 33 a u TNT P
10. 25 Figure 28 Display ot unit PACO SaVInm0 u u u iii ii ii diia 26 Figure 29 Password change Price change a 26 Figure 30 Sequence of adjustment factor display a aa annis nana 26 Figure 31 Request procedure eae eee ee ee en nnne 27 Figure 92 EXI NOM uico ee ee 27 Figure 33 Passage from dispensing to shut off during error simulation phase 27 Figure 34 Identification plate for TW1 B Standard oooooccccccccoconncccononcconooonononnnnnonononnnnnnnnnnnnnnnnnnnnnnnnnonannnnnnnnnnnns 38 Figure 35 Identification plate for TW1nA B Atex iaiocccconccnccooccononoocononononoononoononnnrnnnonannnnn nan nnns nnn naar nnns narra 38 Figure 36 CPU enclosure mounting a 39 Figure 37 Display enclosure mountling noc ii peine 39 LIST of photos PIO T ORO E O 9 4 Photo 2 Setup Price CHANCES incida 4 AS MASA A E EE ein 4 Photo 4 Jumpers on CPU EEE 28 Photo 5 Example of preset customised keypad
11. Lexo Ilvexol ns 3 c Aejdsiq ollz oexo IL exo p413 ou niBuoo ejeg olle loexo lleexol poS33 Aejdsiq ollz loexo I 7exo plz JN s0119 Joye Aejdsiq ollo loexo IL pxo paa e sss A don uH oli loexo llLexo V134 SS IL Lexo llLexo 4333 eouenjDuoo ejeq olle loexo lleexol pOx33 apo4y Kejdsiq apo4y Kejdsiq Error review table uondiu sog 0203040d apoy c SJ0JJ9 638 4 S101419 8J8 UON ce uondio soeg o02030Jd opo V D O Q o x O D O D P Q C LL gt D i O lt O o gt E EWVOBS 601 C D 05August2o1 318Vl MJX SedOodd3 Description of abnormalities Display Communication with Host Setup data loss Tank level Pulser channel control Temperature off range Fuel cut off device Error A P I data table Data congruence Type No EWO55 601 Checks the presence of the single LCD bars and identifies the missing line Error code Erd1 or Erd2 Checks that there is a polling call from Host at least every 5s If there is no call dispensing will be cut off Error code ErLn If setup data is missing or not congruent the computing head does not dispense forcing the user to insert the missing data Error code ErSU Checks the level sensor it can stop current dispensing and or it can wait until the e
12. Manager password value 1XXXX This can only be used to change prices The first value is always 1 and marks the codes re served for the system manager The starting value is 10000 Technician password value 2XXXX This can be used to change all the parameters in the computing head setup procedure The first value is always 2 and marks the codes reserved for the maintenance company The starting value is 20000 Importer password value 3XXXX This can only be used to clear the previous passwords The initial value is wired inside the firmware it is communicated to the client at the time of sale and cannot be changed Type No Total pages EWVOB5 601 C D 05August2o1 Lay The password is made up of 5 digits The first digit shows the access level Importer Techni cian Manager Within the procedure the first digit access level cannot be changed so it is not displayed the other four digits are set by the user Press black button t to go to the value desired for the first digit Press red button S to go to next digit Once the last digit is also correct press the green button to confirm Figure 25 Change Password To exit the SETUP procedure reset Jumper JP2 to open Dispensing is not possible if Jumper JP2 is closed in SETUP Type No Total pages EWVOB5 601 C D 05August2o1 Lay 4 2 5 Price change Press the red S button to enter setup mode then the computing head
13. P1 value of preset Button 1 this value is only valid if preset to Euro if it is preset to Litres the value is 11 P2 value of preset Button 2 this value is only valid if preset to Euro if it is preset to Litres the value is 10l E Press black button t to increase the value of the flashing digit E Press red button S to go to the next digit E Press green button U to exit the procedure C hh Q Parameter CF The conversion factor of the local currency in to Euro is composed of 1 whole and 5 decimal points e g for the old Italian Lira it equals 6 55957 as per standard DGI C 4 99 Follow this sequence to enter the data press the button to increment the value of the flashing digit press red S to go to the next digit when all the digits are set press green U to exit the procedure Figure 22 Display of Cur rency Euro conversion Type T No Total pages EWOBS 601 C D 05August201 Lay 4 2 4 Password At the end of the setup the computing head asks whether chang ing the password or not and waits for an answer Yes or No Press black button to change the password Press green button to exit without changing the password see 4 Figure 11 If the answer is No the procedure terminates after saving data If the answer is Yes a similar sequence to the ones already seen can be used to change the password Figure 24 Data saving display The password is structured as follows
14. beginning of each dis pensing Indicates how many cl are dispensed in slow flow be fore beginning fast flow dispensing This indicates if the minimum level alarm status will activate with normally closed or normally open con tact This indicates whether the minimum level alarm must activate at the end of dispensing BC 0 or if it can also activate during dispensing BC 1 this specifies the type of rounding off 0 last digit not rounded off 2 1 ifld 25 last digit rounded up 10 if Id lt 5 last digit rounded down 0 a 2 ifid gt 0 and lt 5 last digit rounded up 5 if ld gt 5 and s 9 last digit rounded up 10 a 3 ifpdz5last digit rounded up 10 if pd 5 last digit rounded down 0 where Id last digit displayed pd previous digit specifies the number of digits to the right of the dec imal point unit price specifies the number of digits to the right of the dec imal point sale price specifies the type of passage to a round figure 1 no switch to round figure m 2 rounding off units 1 00 2 00 etc 3 rounding off tens 1 00 2 00 etc The position of the decimal point 100 or 10 0 1 00 etc makes no difference specifies if LC input will be used to detect a tank lev el or to display the fume recovery system status specifies the number of displays connected specifies in tens of seconds from 10 to 50s the no flow timeout before blocking dispensing if dispensing is blocked the nozzle must be replac
15. case the Euro can be configured rapidly by setting Jumper J3 when the computing head starts up It will automatically set the correct decimal points Furthermore as required by the standard in countries that are about to convert to the Euro af ter dispensing a volume ex pressed in local currency it is possible to display the sale price in Euro by temporarily pressing a dedicated button Figure 7 Temporary conversion of sale price into Euro The standard European rate DGII C 4 99 is used as the currency conversion rate Press the button again to switch the display back to the local currency The computing head will return to standard display automatically when another dispensing process begins Type No Page Total pages EWOSS 601 C D D0O5August201 3 TROUBLESHOOTING During normal operations the computing head controls the internal data flow and congruence of the field data Abnormalities are handled differently according to the damage they may cause to data The computing head can detect Fatal or non Fatal errors as described below In any case the computing head stops current dispensing displays the memorised error code and if connected to Host communicates the error status 3 1 Fatal errors These are normally due to malfunctioning which can cause loss of data In this case the computing head stops dispensing displays the corresponding code and does not start up again To start up again it needs to
16. in conformity to standards in force lll F siUJelmo s r l d siWelma s r l Via F lli Canepa 134D E 16010 Serra Ricco Via F lli Canepa 134D E 16010 Serra Ricco J GENOVA Italia E GENOVA Italia Certificate of Evaluation N LNE 15272 r v 0 Dtd 13 01 09 Certificate of Evaluation N LNE 15272 r v 0 Dtd 13 01 09 Calculator TW1 B Calculator TW1nA B Style Standard Style Ex nA IIC T4 X gt ua yusa DIG tii Mois ota Power supply 230Vac 50mA Power supply 230Vac 50mA Accuracy 0 5 Unit Accuracy 0 5 Unit Temperature 40 C 70 C Umidity 90 Temperature 40 C 70 C Umidity 90 Mechanical condition CLASS M2 Mechanical condition CLASS M2 Electromagnetic condition CLASS E2 Electromagnetic condition CLASS E2 Figure 34 Identification plate for TW1 B Figure 35 Identification plate for TW1nA B Standard Atex The identification plate shows the following information Rated power supply voltage and current Device manufacturer consumption Address Accuracy Evaluation Certificate Mechanical specifications class Device model Electromagnetic specifications class Application environment Device serial no and date Photo 9 Identification plate on electronic computing head TW 1 Type No Total pages EWVOB5 601 C D 05August2o1 A 9 MECHANICAL MOUNT
17. in potentially explosive atmospheres Power Links M Protection systems e g zener barriers and their use depend on the kind of the dispenser and on the classification of the areas which make it up 0 5 NU 3 e 5 O 4 Tx O E 3 Rx LL Y 7 2 OV field O Display Link 0 1 Aut Man _ TB1 Type No Total pages EWOSS 601 C D O5Augus2014 A Terminal Board TB2 Power Links Clear 10Litres or preset value 1Litre or Preset value Show amount in currency OV field O Q Field Links Display Links L Terminal Board TB3 Power Links Tank Level ChA pulser repeater m OV pulser ChB pulser ChA pulser Vcc pulser OV field Nozzle we N GQ 010 No Field Links Display Links Type No Total pages EWOB5 601 C D 05August2o1 A Terminal Board TB4 Power Links Temperature 2 Field Links Display Links Terminal Board TB5 Not used in this version Type No Total pages EWVOB5 601 C D 05August2o1 Connector J1 TB8 TB7 Power Links Display Links J1 Field Links S O TB6 4 Uu 4 w E Ww y SOS SS E Uu Display connector L SETUP Card
18. nsn anna 20 Figur 14 Display D8I RI u e e ES ES e EOS A 20 Figure 15 Display initial AGS Pulse a 20 Figure 16 Allotting Setup DUDAS a TENAAAN aaa 21 Figure 17 Display AdiusIment Taclo 21 Figure 18 Manual setting of adjustment factor 21 Figure 19 Error exceeds adjustment maximunm a 21 Figure 20 Error below minimum adjusiMeNt ooonncnncccconncnnccconnnnonononnnonononnnnnnnnnonnnnnnnnonannnnnnnnnannnnnnnnnannnnnnonananennns 22 Figure 21 Example of P1 and P2 value in Euro a a 22 Figure 22 Display of Currency Euro CONVEISION occccccccoccconccocoonnoonoconononnnnnnanonnnnonnnnnnnnnnrnnnnnnnnnnnnnnnnnrnannnnnnnnnanannnnos 22 Figure 23 Password change request SetUp cccoconnconcccoonoonococonnonnocononononnnnnnnnnnnnonnnnnnnnnnnnrnnnnnnnnnnnnnnnnnnnnnnnonaninnnns 23 Figure 24 Dala SQVINOOISDISV uu u aun 23 Figure 25 Change a SS WOO u u oline tiald dia 24 FONE 20 T asa Ol ria iodo 25 Figure 27 Password change request Price COHanQ6 ocooocccccconcnccconcnnconanonconononnonaronnonannnnonnnnnnnnannnnnnannnnnnnrnnnnnanenes
19. procedure described below see S 4 2 Q Motor stop and solenoid valve closure Type No Total pages EWVOB5 601 C D Awst 9 40 2 2 7 Stop at round figure During dispensing it is possible to stop the current flow at the first round figure from the com puting head as follows with nozzle off not in place and motor operating press any of the preset buttons turn on nozzle to start dispensing again The computing head will stop dispensing at the next Euro or litre See this sequence in 2 2 5 2 2 8 Managing a power outage During normal operations whether or not the dispenser is currently in use there may be a power surge or outage if this occurs the computing head will enter a PWF procedure so it can memorise sale price volume dispensed and totalizer The data is displayed for about 30 minutes after the power fail The power fail status is shown by the word OFF on the unit price display When the power supply is restored the memory brings up the last sale data and shows it on the display 2 3 Connection to Host The computing head has a standard 3 wire connection TX RX Gnd Other connections are possible by using an adapter card To use and implement different protocols a licence issued by the owner is required 2 4 Euro As described below in 84 2 the computing head can be set up to operate in different curren cies the decimal points can be moved to suit the unit price and the sale price In any
20. requires the password if not changed previously the default password is 10000 Follow the procedure below to enter the cor rect code Figure 26 Enter Password Price change Press black button t to go to the value desired for the first digit Press red button S to go to the next digit Once the last digit is also correct Press red S button again to enter setup To enter the Price change procedure it is not necessary to remove the lead seal to set Jumper J2 because this operation is not metrically relevant If the password is incorrect setup procedure stops immediately and the computing head goes into stand by If the password is correct the unit price can be reset The operating sequence is the same as above Press red button S to select the price to change Press black button t until you reach the desired value Press green button U to exit the procedure At the end of the setup the computing head asks whether changing the password or not and waits for an answer Yes or No Press the black button to confirm that you want to change the password Press the green button to exit without changing the password Figure 27 Password change request Price change Type No Total pages EWOSS 601 C D 05Augusi2014 If the answer is No the procedure terminates after saving the new unit price If the answer is Yes a similar sequence to the ones already seen can be used t
21. the totalizer The computing head is blocked if there is an ab normality Error code FEto Checks the presence of the Pulser if it is missing it cuts off supply Error code FEPP During dispensing it checks that there is no intervention of the thermal protection If ther mal protection intervention occurs dispensing is blocked Error code FEHt This error occurs when the fume recovery pump absorbs an even small quantity of liquid Error code FErU Tank level is a multifunction input Correctly set the relative paramaters to use it both to de tect a level sensor and to cut off supply when the fume recovery system fails see computing head setup S 4 2 Type No Page Total pages EW055 601 05 August 2011 4 PROCEDURES Apart from normal dispensing three other procedures are available General totalizer reading Computing head setup change settings price change Metric office simulating abnormalities To start a procedure just press one of the buttons on the setup board The display shows the following flashing notice Press one of the setup buttons to start up the corresponding pro cedure the buttons are on the printed circuit connected to the dis play cable Figure 8 Display Select procedure Procedure black t general totalizer reading Procedure red S Computing head setup change param Procedure green U Metric office simulating abnormalities Figure 9 All
22. weight nominal 1 pulse 1cl Preset value used by the computing head when but ton 1 is pressed It can be programmed in or local currency for the amounts Delivered fuel value is however 1L Preset value used by the computing head when button 2 is pressed It can be programmed in or lo cal currency for the amounts Delivered fuel value is however 10L After the SETUP procedure is completed set Jumper JP2 to open for dispensing Dispensing is not possible if Jumper JP2 is closed Total pages EW055 601 C D 05August201 Lay 4 2 1 Simple parameters E Select the parameter to change press the green button U to change pa rameter E Press black t button to increment the current parameter value E Press red S button to clear the cur rent parameter value or set it to the minimum E Press the green button U to pass Figure 13 Display of some setup parameters to the next parameter 4 2 2 Parameters for volume compensation to temperature Volume compensation is intended as the procedure that can be used to change the volume dispensed to suit the temperature and other parameters described below To compensate the volume the computing head uses the density of the LPG dispensed known by its chemical composition butane propane and pentane etc and the value of its temperature The A P l tables memorised give the correction values to apply The value of the temperature measured
23. ET TORRE EELSE A ai Photo 4 Jumpers on CPU Type No Total pages EWOS5 601 C D O5August20i1 28 The Pulser can be configured to the following specifications Rated power supply voltage 5V 200mA insert the Jumper to position VP5 12V 100mA insert the Jumper to position VP12 mutually exclusive 24V 50mA insert the Jumper to position VP24 Q Type of output Channel activated low jumper JP4 open Channel activated high jumper JP4 closed The connection terminals of the Pulser must only be used to connect the Puls er Do not use the power supply or channel terminals for any purposes other than what they are designed for Type T No Total pages EWVOB5 601 C D 05August2o1 6 OPTIONS 6 1 4X4 field keypad If it is necessary to preset a quantity of product with very different values and with a variable decimal point a 16 key keypad is essential Both language and functions of this keypad can be customised to suit customer requirements lt is also possible to use a field keypad to se lect setting in Euro or in litres each time Photo 5 Example of preset customised keypad 6 2 12 digit on 2 line display If the keypad is in an inconvenient position to see the main display of the computing head it is possible to add a small secondary display next to the keypad this display completes the human computer interface and also works for complex procedures such as automatic pay m
24. ING The computing head CPU is housed in a metal enclosure that can be mounted both vertically and horizontally Special tabs are included for correct anchorage 205 45 For slots for fastening the CPU A wd i i SNNNAN us u 9o ES Es h E f i Te Im 2 z E Figure 36 CPU enclosure mounting The display also has some mounting points The tabs located in the centre are not mounting points but are dedicated eyelets for the lead sealing j sw 2 M3 holes for mounting the display Lo s Eee NA NN NA s d E H H _ P gt H E 25 297 H L E LJ aU 2 6 holes for mounting gt T EA Z i g the display Figure 37 Display enclosure mounting Type No Total pages EWVOB5 601 C D 05August2o1 10 SEALING PROCEDURE FOR THE TW1 B and TW1nA B COMPUTING HEAD 10 1 CPU sealing plan Lead seals that prevent removal of the CPU en closure and access to the board Lead seal that prevents removal of the display cable Lead seals that prevent removal of field connec tions Lead seal that pre vents removal of the display from the dispenser me chanics Lead seal that prevents access to the display board
25. LPGdispensed 500655 5 gm 20 ft Temperature correction detected 20 fe Declared level protocol n4 fh Ll ee 2 cr ConvrateofCurencye fo 9dig t dg AdjPulse Changepulseweight k o 20 t dig 24 P1 Presetvalue button fO 9 dig t dg ort 25 P2 Presetvalebuton2 k o9 dig t dg orL Password xo x9999 1 Description of setup parameters LF slow flow Atthe end of dispensing with pre setting in order to reduce mechanical inertia of the dispenser it is nec essary to slow down the flow LF shows at what cl point the dispenser will switch to slow flow before the end of dispensing Q AS fuel cut off device Quantity in cl that the computing head counts before starting fast flow dispensing Type No Rev Total pages EW055 601 C D 05August2011 40 2 ALLAN address Pr Type of pre setting 2 EL cl clearance AP slow flow dispensing 2 PC Min level BC intervention mode Ar rounding off Dp Decimals in unit price Di Decimals in sale price Ct Switch to round figure LC Tank level Fume recovery nd number of displays SE no flow timeout This is the address of the computing head if con nected to Host Computer The computing head can be preset as follows 0 no preset 1 preset to Litres m 2 preset to Currency This is the number of cl that may be counted but not shown in the display at the
26. TW1 B Computing Head User Guide Gasoline version siWelma s r l Via F lli Canepa 134d e 16010 Serra Ricc Genoa ITALY Tel 39 010 754211 Fax 39 010 7542178 email info esiwelma it Type No Total pages EWOBS 601 C D O05Augusi2014 CONTENTS 1 8 9 1 TECHNICAL DESCRIPTION m 4 1 1 Structural specifications 4 1 2 Technical specifications 4 FUNCTIONAL DESCRIPTION ma 6 2 1 Display 6 2 2 Description of operating sequences 6 2 2 1 Manual dispensing 8 2 2 2 Pre set value dispensing 8 2 2 3 Pre setting the volume on the dispenser 8 2 2 4 Pre setting by Host 9 2 2 5 Pre setting by 16 key keypad 9 2 2 6 Automatic stop sequence 9 2 2 7 Stop at round figure 10 2 2 8 Managing a power outage
27. a in RAM with the original data in EPROM Q UNIT PRICE check that the unit price is not zero If the above checks give a positive result before switching off the display temporarily shows the program code and immediately after it brings up the last dispensing data If there are any abnormalities the display will show the relative error code if possible see Troubleshooting 39 With the nozzle in place the computing head performs the following checks DISPLAY it checks the display connection status Q TANK LEVEL it checks the fuel level in the tank Q RAM it checks the writing and reading capability of the data RAM Type No Total pages EWOB5 601 C D Awst 6 40 Lay The pump begins dispensing when the nozzle is unhooked If the dispenser is available the nozzle can be removed which will set off the computing head dispensing sequence performing the following tests Q The same ones described above see 82 2 PULSER in the event of a pulse measuring device the pres ence of pulses is verified in temporal congruence 2 TOTALIZER checks the presence of the electromechanical total izer Q FUEL CUT OFF DEVICE To make sure the dispenser hose and seal are un impaired during the display test described above the motor starts and checks that the quantity pumped in this phase AS does not exceed the quantity programmed if this occurs the computing head will cut off supply If the
28. above mentioned checks give a positive result dispensing can start with a visual con trol of the display and subsequent activation of the motor and solenoid valves Q Display All digits display 8 followed by Blank then 0 00 Euro and 0 00 litres Each sequence takes about 1 seconds so the operator can check that each segment is operat ing correctly at a glance co Figure 3 Dispensing start up sequence During dispensing the computing head performs the following functions Q Activates command modules on the following devices motor solenoid valves and signal lights Acquires pulses from the transducer One pulse 1 cl Calculates and displays the volume dispensed and the sale price Checks that the data displayed is correct implicit with RAM and EPROM Checks that display is operating Checks the presence and management of electronic and electromechanical totalizer Checks the power supply on the motor line motor thermal protection see 83 Type No Page Total pages EWOSS 601 C D OS August2071 Dispensing ends when The nozzle is returned to position The pre set value has been reached The preset quantity price has been reached Abnormality see 83 Pulser not operating for longer than set up time SE parameter Block command from Host If dispensing stops due to an abnormality the display will show the relative error code if possible see Troubleshooting 83 2 2 1 Manual dispensing Th
29. be reset by switching off the power supply for a few sec onds Q Data congruence Q Totalizer presence error EPROM error Pulser presence error Q RAM error Intervention of motor thermal protection EEROM error Vapor recovery 3 2 Non fatal errors All stops caused by an abnormal field status and all stops caused by a temporary operating abnormality caused by a contingent situation such as the lack of unit price or an occasional situation such as a data invalidated by a disturbance belong to this category In this case the error will be automatically deleted as soon as the cause that created it is removed The computing head will attempt three start ups at the fourth unsuccessful attempt the error turns fatal Display 1 and 2 2 Communication with Host Q Setup data loss 2 Tank level Pulser channel control LPG temperature sensor out of range Fuel cut off device Error A P l data table Type No Page Total pages EWOSS 601 C D D0O5August201 ojuesse Jes nd ejeue Wd treo ue Md43 auoIzesuaduloo qe eBueJ no Ulis exo lieol 1pJ3 eJnjeJeduje e1osues ezueseJg elle foexo Ilvexo 1943 oqn eypJeg ojueuupueds uy Ul exo exo svi EU1 SIO OJ GAT elle texo Ilvexo Oo Hd sJOJ19 JN Jaye 1ndino Jesind illo Lexo llzpxol nd3d S1O11 JN Joye qe abuermo q zexo llyyxol 1933 sJOJ193 JN Jaye pueds uy io 7exo lIZpxo SY34 dnjas nep ezueoueyw liy
30. by the sensor can be corrected by using the parameter t to adjust the temperature detected by the sensor at 1 C increments in the 20 C field 4 2 3 Complex parameters Some parameters have more digits in order to change them a different display and proce dure is necessary Q Parameter d density of product dispensed this is used to compensate the volume dispensed The following sequence is used to set it up E Press black t button to increment the density value E Press red button S to decrease the value to the mini mum E After you set the desired value press green button U to exit the procedure Figure 14 Display Density Q ADJ Pulse This is the procedure to calibrate the mechani cal counter by changing the value of the pulse rated value 1 pulse 1 cl This procedure is only available in the versions of those countries where this control is allowed Before entering the procedure a certain quantity of 20 litres must be dispensed use a 20 certified measure for this Figure 15 shows the display that comes up when you enter the procedure Figure 15 Display initial AdJ Pulse Type No Total pages EWOBS 601 C D 05August201 Press black button A or green button M to select automatic or manual adjustment If the operator selects A the computing head calculates the difference between the volume dispensed and the true volume 20 litres and suggests adding or subtract ing the cal
31. c Power Supply Power Supply Add Ad md 9 Not used in this version a EET E A EYBk y 4 20 ag EV o O go c E 2 Motor 213 8 o 3 5 Y All alimentazione O zn oOx o 1 Common hydraulics 230Vac o 24Vac o w eo al TB6 O S NINA S N BE y apa ee I V IT wm 7 e den r s 48 0VFld 2 775680 J TR2 12230 200 fy 515 TR 1 3 PT100 e lt 4 4 TR2 E N TB8 TB7 MIL ENT f a A 3 OVFld Temperature 1 HV connections P4 V5 TRI 5 TR 7 g l 4 TRN 2 4 TRI 2 i 7756ac 3 Po EN PT100 M ra TB 5 P i P A 8 Tank Level gt p 70 7 ChA pulser repeater C ti Head 3 ee pa 6 OV pulser i omputing hea J Pd C 5 ChB pulser TW1 CPU Board Ha 4 ChA pulser 2 8 Vcc pulser O 2 OV field en 2 8 ia Nozzle s 0 LO TB3 S Q 9 Clear gt 4 10 00 10Litri__ 2 omO l 3 5 00 5Liti Display A ve O 2 request m connection E 1 OV field m TB2 ANE 5 NU Jo LU J1 Pa I Display connector po Px I a ved j
32. culated error volume given in parts per 1000 Figure 16 Allotting setup buttons Press the green button again to terminate the procedure If the operator selects M the computing head allows the calculated er Ct ror given in parts per 1000 to be entered manually Figure 17 Display Adjustment factor E Press black button t to go to the value desired for the first digit E Press red button S to go to next digit E Once the last digit is also cor rect press the green button to confirm Figure 18 Manual setting of adjustment factor E Press black button t button to select the adjustment SUM to add SUB to subtract to clear the adjustment factor to zero E Press the green button to terminate For future adjustments automatic and or manual the computing head always considers the actual val ue dispensed so it is not necessary to clear the pre vious adjustment factor The maximum adjustment range accepted is 9 99999 parts per 1000 If the er ror exceeds the adjustment limit the computing head will display out of range status and will clear the ad justment factor to zero Figure 19 Error exceeds adjustment maximum Type T No Total pages EWOBS 601 C D 05August201 As above if the error to correct is lt 1 00000 the computing head automatically sets the adjustment value to 0 Press the green button to terminate Figure 20 Error below minimum adjustment Q
33. e operator starts and stops dispensing by removing replacing the nozzle 2 2 2 Pre set value dispensing The head independently cuts off supply when the amount required is reached whether it has been programmed using the preset buttons or in the event of Host programming The amount requested is shown as follows Unit price display always active Sale price display if Euro is selected the requested value is shown otherwise it is off Display of volume dispensed if Litres are selected the requested value is shown otherwise it is off UDDU Figure 4 Example of pre setting Figure 5 Example of pre setting Sale price of 5 00 10 L dispensed 2 2 3 Pre setting the volume on the dispenser The preset buttons can be used to program the quantity to dispense both as sale price and as volume Choose whether to operate in Euros or in litres and the value assigned to the relative button from setup by following the procedure described below see 4 2 To obtain the desired quantity the relative buttons need to be pressed in sequence At any time it is possible to view the previous dispensing data by pressing CLEAR Type No Total pages EWVOB5 601 C D Awst 8 40 Position Sale price currency The amounts shown in this table are only an example of the sale price and depend on the value assigned to each button during setup phase The values of the volume dispensed are fixed and cannot be c
34. ed Total pages EWOBS 601 C D 05August201 2 Po Pos option Sd Start delay AC LPG compensation d Density of LPG o t Temperature offset PL Protocol Level Q CF Currency conversion rate AdjPulse Meter calibration Q P1 Value assigned to button 1 o P2 Value assigned to button 2 This setting decides how the computing head sends the sale price 0 sale price X 1 1 sale price X 10 opecifies the pump start delay 0 Start when nozzle is extracted 1 Start at the end of blank display no AS 2 Start after display time shows 0 00 no AS Enables compensation of the volume in line with the temperature of the LPG dispensed according to the A P l tables 0 no compensation 1 volume compensated Density value of product dispensed Depends on composition of gas dispensed The value entered must be between 500 g m and 655 g m the parameter is only displayed if AC 1 This can be used to correct the temperature detected the sensor at steps of 1 C in the field of 20 C It sets the Protocol Level used for communication 1 Pumalan standard 2 Pumalan mono multiproduct mix 3 Pumalan esteso mono multiproduct mix 4 Pumalan like 3 with the totals and data counting Pumalan is a LOGITRON trademark This is the conversion rate between the local currency and the Euro This can be used to calibrate the mechanical counter by changing the pulse
35. ent inserting a password kilometres covered etc mmt arrive m In this case the display shows manon Date Temperature Time Alarm status Type T No Total pages EWVOB5 601 C D 05August2o1 6 3 Abnormality signalling device If a detected abnormality has to be shown in remote a simple device can be used it is con nected to the same flat cable used for display and can be used to activate a free voltage con tact in turn used to supply power to a light or any other signalling device Electrical specifications Vaade iA F Max voltage 2 0Vca or 350Vdc Q Output current depending on device used 3A Relay Standard 1A Solid state devices Atex non sparking TWINA MRS Er 0 1 It een Qe A Mechanical specifications Fixing method DIN rail Overall dimension 90x35x58mm Weight 60g 6 4 IO expansion device When the application imposes a test of non standard apparatus an l O expansion device can be used The board set up for this can read six inputs and route the same number of outputs The inputs are available on a terminal board The Open Collector outputs can be connected to the corresponding activation using flat cables Electrical specifications INPUT Vmax 5Vdc with open terminal Imax 1mA with closed terminal at OV INPUT w OUTPUT Q OUTPUT Vmax 24Vdc non active output Imax 10mA with active output Photo 8 I O expansion device
36. hanged 2 2 4 Pre setting by Host Each time the computing head is connected to a Host both with Pre pay and Post pay func tion it can receive preset values of Euros or litres without distinction as long as the POS has this function No metric parameter can be set from Host The unit price cannot be changed while dispensing 2 2 5 Pre setting by 16 key keypad When the computing head switches on it carries out a keypad presence check If this test is positive the computer manages the keypad to preset a dispensing volume or sale price When the nozzle is in place the keypad is operative and can be used as follows 1 Pre set Euro or Litres by pressing the correspond ing key This is obligatory to continue 2 Press number keys with comma if necessary to preset value 3 Press ENTER The display of the computing head will now show on the corresponding LCD the sale price top line or the dispensing volume middle line selected 4 f the value is correct dispensing can begin If an error occurs press DELETE and repeat steps 1 to 3 Figure 6 16 key keypad The keypad will not work during dispensing When the nozzle is put back at the end of dis pensing the keypad can be used for a new operation 2 2 6 Automatic stop sequence Automatic stop occurs in two phases Flow rate reduction controlled by a solenoid valve The slow flow offset can be changed from setup parameter LF by following the
37. housed in a metal enclosure that protects it mechanically 1 2 and against EMI jamming a price change setup board in a plastic enclo sure The assembly can be housed where the user desires or inserted only when necessary one or two display cards inserted inside a metal enclosure Technical specifications Power supply Power consumption Temperature Humidity non condensing Max flow rate Measuring unit Solenoid valve control Pulser 2 channels Protection grade Total counter depending on version Electromechanical not resetable 7 digit Electronic not resetable 10 digit Dimensions of head CPU Weight of head CPU Dimensions of head Display Weight of head Display Outputs device depending Relays for TW1 B Standard or Solid State relays for TW1nA B ATEX The declared protection grade concerne the metallic box The devices enclosed by the dotted line in Figure 1 must be installed in a cabinet with at least protection degree IP54 compliant to standard EN60079 15 of ATEX directive Ewos 601 C D UI HOT 230Vac 10 10VA min 40 C max 70 C Photo 3 Display 95 3 5l s litre N O max 270Vca 3A Standard 1A Atex 1 pulse 1cl IP20 1 counting unit 1l see Setup 1 counting unit 1l see Setup 230 x 154 x 66 mm 1950g 225 x 250 x 50 mm 960g Page Total pages 05 August 2011 230Vac 230Vac o 24Va
38. nd of dispensing and prevent the next one see note Error code ErLC Checks the alternating channel outputs of the Pulser and cuts off dispensing if necessary Error code ErPU Checks the temperature detected by the sen sor Pt100 This must lie within the operating range 60 C 60 C Error code ErSt At the start of dispensing checks that there are no leaks in the hydraulic circuit If there are leaks dispensing is blocked Error code ErAS Checks that the pointed value in the A P l table is correct i e within the LPG liquid state zone Error code Erdt Checks the congruence of the memorised da ta The computing head constantly checks the EPROM and the RAM data also during dis pensing if there is an error it cuts off supply Error code FECd Page Total pages 05 August 2011 EPROM error RAM error EEROM error Totalizer error Pulser presence error Intervention of motor thermal protection Vapor recovery NOTE The CPU calculates the EPROM checksum and makes sure it is the same as what the EPROM shows The computing head is blocked if there is an abnormality Error code FEEP With the nozzle in place the CPU checks the RAM The computing head is blocked if there is an abnormality Error code FErA With the nozzle in place the CPU checks the E rom The computing head is blocked if there is an abnormality Error code FEEE Checks the presence of
39. o change the password Press black button t to go to the value desired for the first digit Press red button S to go to next digit Once the last digit is also correct press the green button to confirm Figure 29 Password change Price change 4 3 Metric office procedure This metric verification procedure is split into two steps management of the mechanical measurer correction memory s simulating errors 4 3 1 Adjustment factor memory Apart from the current factor the last three adjustment factors used are memorised so it is possible to test any measurement fluctuations caused by temperature or season changes and the like After entering the procedure the computing head shows the current factor HISt 0 and the last three factors HISt 1 HISt 2 HISt 3 Figure 30 Sequence of adjustment factor display Press green button U to enter the procedure Continue to press it to continue the display of the values memorised Type No Total pages EWVOB5 601 C D 05August2o1 Lay After the computing head displays the last value it asks if you want to start the error simula tion procedure This metric testing procedure is used to simulate a sequence of er rors and to test that the computing head blocks dispensing by showing the corresponding code Press black button Y to enter the procedure Press green button N to exit Figure 31 Request procedure
40. otting setup buttons 4 1 General totalizer reading The general totalizer is a non settable counter that can be used to store and display the Li tres dispensed in 10 digits since a display with that many digits is not available digits are broken down into sets and displayed as follows 1st set 1 digit 2nd set 3 digits 3rd set 3 digits 4th set 3 digits 0 000 000 000 most significant digit least significant digit 0 000 000 000 Type No Total pages EW055 601 05 August 2011 After pressing black button lt t gt the computing head displays the first set in order to pass to the second and to the third sets it is necessary to push the green U button each time Figure 10 General totalizer display Litres A non resettable 7 digit electromechanical totalizer is also mounted on the display This to talizer is controlled electronically and if it malfunctions the computing head cuts off fuel sup ply underway and displays the error code FEto 4 2 Computing head setup Press the red S button to enter setup mode then the computing head requires the default password 20000 Follow the procedure below to enter the correct code To enter the SETUP procedure set Jumper JP2 to closed SETUP is not possible if Jumper JP2 is open E Set Jumper J2 E Press black t button to go to the value desired for the first digit E Press red S button to go to next digit E When the correct value is reached fo
41. r the last digit press red S button again to enter setup If the password is incorrect setup procedure stops immediately and the computing head goes into stand by If the password is correct the parameter values can be reset If you forget to set Jumper J2 the computing head notifies you that the Jumper must be set to perform setup by displaying this message Set JP2 Figure 12 Request to set Jumper JP2 Type T No Total pages EWOBS 601 C D O5August204 Lay The following table shows all the available settings Computing head setup parameters Code Abbrev Meaning____________ Field Incremental U of m _ 10 90 o2 jas Fuelcutoff o0 j Ja o3 ja QuNaddes faz f j o4 Pr rypeofprestig fe o6 jap N clinslowflowdispensingstart o 10 Ji ok o7 Pc Min levelcontactpolarity o3 ho o J o8 Bc Blockmodeformin level o1 fe o9 far Appoxmationofsalepice o3 ho 10 pe J Dedmasinuntpice o3 h o e 11 br Decimalsinsaleprice o3 h o Je 12 ct swichtoroundfigue j h e 13 lc Tanklevel Fumerecovery o3 h 14 Na Numberofdispaysconeced t2 fo e 15 se Nof w timeout 10s 16 Po Pos optiom ft h j 17 sa Motorstartupdelay fe 18 AC LPGcompensationenabled_ o h 19 ja Densityof

TW1-B Computing Head User Guide

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