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Siemens SIJECT 16i, Operation Manual

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SIJECT OP15B Screens

SIJECT 16i   Operation Manual

3-20

3.1.6  Counter screen

Fig 3-20

Counter screen

Operating sequences

Press this key to enter the counter screen. See Fig 3-20 Counter screen.

Part count and part numbers for each mold can be set on this screen.

Part counter (Part Count) 

 Set the production quantity.

Part numbers for each mold (Part Nr/Mld) 

 Set the production quantity

for each mold.

Shots counter (Shot Count) – Display the number of shots.

Parts  of  this  power  on  (Parts  from  Startup)  –  Display  the  production
quantity of current power on.

Softkey  F1 

  Clear  shot.  Press  this  key,  and  the  injection  time  will  be

reset.

Softkey F2 

 Clear part. Press this key, and the part count will be reset.

Summary of Contents for SIJECT 16i

Page 1: ...User Manual User Documentation Software Version 1 11 2003 Edition SIJECT 16i Operation Manual ...

Page 2: ...SIJECT 16i Document Structure General Documentation Catalog Technical Documentation Start Up User Documentation Operation Manual Short Start Up Operation Manual Start Up ...

Page 3: ...1 2 3 Valid for Control System Software Version SIJECT 16i 1 10 11 2003 Edition SIJECT 16i Operation Manual Software Version 1 User Manual Introduction Operator Panel Keys SIJECT OP15B Screen ...

Page 4: ...ocument or its contents is not permitted without express written authority Offenders will be liable for damages All rights including rights created by patent grant or registration of a utility model are reserved Exclusion of liability We have checked that the contents of this document correspond to the hardware and software described Nonetheless differences might exist and we cannot therefore guar...

Page 5: ...15B SCREENS 3 1 3 1 Hot key Screens 3 1 3 1 1 Information Screen 3 7 3 1 2 Monitoring screen 3 10 3 1 3 Alarm screen 3 12 3 1 4 Temperature screen 3 15 3 1 5 Timer screen 3 18 3 1 6 Counter screen 3 20 3 1 7 Function screen 3 21 3 1 8 Save load screen 3 22 3 1 9 Data screen 3 23 3 1 10 Service screen 3 25 3 2 Manual operation screen 3 38 3 2 1 Mold open close screen 3 38 3 2 2 Ejector screen 3 40 ...

Page 6: ......

Page 7: ...SIJECT 16i Operation Manual 1 1 1 Introduction 1 1 Operating panel layout Fig 1 1 Operator panel layout ...

Page 8: ...reen with the key then control the machine movement manually 5 Number keys 12 keys Input number parameter Create recipe data 6 Cursor keys 6 keys Move the cursor to the required position with Cursor key then press Enter key to confirm the setting Or when screen displays the message press ACK key press ACK key to confirm 7 Operating mode keys 7 keys Select machine mode with Mode key When in Semi Au...

Page 9: ... level For instance the structure Service screen is designed in multistage structure It is oriented to the OEM customer Therefore it comprises the most important function parameters for OEMs Altogether ten different screens can be displayed All hot key screens are listed in Table 1 2 for reference Table 1 2 Hot key screen structure ...

Page 10: ...out and core2 in out have the second level that is they are used for core 3 function The parameters like position pressure flow delay time counter and mode selection can be set in these screens Table 1 3 Screen structure of manual operating keys Screen 1 Mld Clo Opn Screen 1 Eject Screen 1 Carriage Screen 1 Injection Screen 1 Charging Screen 1 Core 1 Screen 1 Core 2 Screen 1 Air blow Screen 1 Mold...

Page 11: ... end customer Please see the manufacturer documentation SIJECT 16i Start up for detailed information Control process The configuration of individual injection molding machine can be different but the working process should be implemented in a similar way Thus we describe it roughly in the following diagram It is provided in the diagram that the Core in acts before Mold Close Start or during Mold C...

Page 12: ...ding Core 2 out Mold open end Ejector shake Ejector stay Ejector auto retract Counter arrive Cycle end Start cooling time Core 1 out Yes No No Yes No Yes No Yes Yes No No No Stay time Yes No Yes Yes No Shake times arrive Ejector shake Yes Yes Carriage advance Carriage retract Open mold Core 3 out Ejector advance Ejector retract Carriage retract Charging Close mold Air blow Ejector shake time No Fi...

Page 13: ...splay LCD General The LCD display with CCFL back light has a good performance to display Alarms Recipe data Customer specific picture Operation status Performance The LCD has the following characteristics 320x240 pixel 5 7 Chinese English the contrast can be adjusted manually ...

Page 14: ...start up the purge function Injection reset Injection reset execute reset fuction of injection counting Manual Lubrication Manual lubrication lubricate manually Softkey F2 Softkey F2 Operation path and function Page down purge key Purge stop Purge stop stop purge function Product reset Product reset execute product reset function PLC version PLC version display PLC version of MMC card Force output...

Page 15: ...gital input save mold parameters into MMC card or CI increase screen contrast increase limit value save program into MMC card set the password set manual lubrication Softkey F4 Softkey F4 Operation path and function digital output load mold parameters from MMC card or CI decrease screen contrast reduce limit value load program from MMC card temperature setting ...

Page 16: ...erator panel keys SIJECT 16i Operation Manual 2 4 Softkey F5 Softkey F5 Operation path and function proportional valve start up ramp data setting Softkey F6 Softkey F6 Operation path and function Page up ...

Page 17: ...nd the actual value of temperature channel can be displayed as well In addition you can choose the heat holding function and you can set the tolerance of temperature control You can also choose the control mode of nozzle open loop close loop Timer key Press this key to enter Timer screen Every time duration can be set such as cycle time cooling time mold open close time as well as every delay time...

Page 18: ...nction selection linear scale setting password setting load save setting proportional valve setting pump setting lubrication setting temperature setting and ramp setting When OEM has finished the start up of injection molding machine these parameters will normally be protected by Password 2 by OEM Information key Press Information key to enter Information screen where the version message of OP CI ...

Page 19: ...after mold close or Core out during before or after mold open Ejector key Press the middle Ejector key to enter Ejector screen Now you can input corresponding parameter Position pressure flow and counter for ejector advance and retract and set counter and ejector mode Ejector will retract continuously if you keep pressing the left key Ejector will advance continuously if you keep pressing the righ...

Page 20: ...tomatically after injection is finished Machine will suck back i e screw retract if you keep pressing the right key Charge key Press the middle Charge key to enter Charge screen Input corresponding parameter Position pressure and flow for charging Screw will be charging if you keep pressing the right key Core 1 key Press the middle Core 1 key to enter Core 1 screen Input corresponding parameter fo...

Page 21: ...rresponding parameter position and time for Air blow 1 and Air blow 2 Air blow 1 will work if you press the left key Air blow 2 will work if you press the right key Mold adjustment key Press the middle Mold adjustment key to enter Mold adjustment screen Input pressure and flow for mold adjustment There are two ways to adjust mold When manual mold adjustment is selected you can set pulse here If au...

Page 22: ...or down and the ENTER key and Acknowledge key ACK key When alarm appears and the system message displays on the screen press the ACK key to confirm them Example If you want to input a parameter like pressure or flow of injection first press injection key to enter Injection screen then use cursor keys to go to corresponding field Input parameter using number keys and press ENTER key to confirm your...

Page 23: ...number Timer Full Auto mode key Set all the parameters necessary including total cycle time press this Timer Full Auto mode key and wait for the LED on Press the RUN key to start the system The machine will execute the cycle automatically until the set product quantity has been reached Then the machine stops and LED off Lubrication can be done automatically if the machine has run more times than t...

Page 24: ... reset the parameters and clear the alarm Mold Adjustment mode key This mode is especially used for mold adjustment when a new mold is installed in the machine Following operations can be carried out in this mode they are Mold open close ejector advance retract injection decompression charge mold adjustment advance retract and lubrication Press this Mold adjustment mode key and mold adjustment key...

Page 25: ... used to control the motor and heater Motor key Push the left key to start the motor The motor will be actuated in star mode at the beginning after the delay time it will switch to triangle mode Push the right key to stop the motor Heater key Push the left key to switch on the heater push the right key to switch off the heater ...

Page 26: ......

Page 27: ...r 3 seconds On this information screen the PLC version OP and CI version will be displayed Then the system will change to monitoring screen automatically SIJECT 16i Tel 86 25 2101888 Fax 86 25 2101666 Siemens Numerical Control Ltd Nanjing P R China Starting please wait Fig 3 1 Customer specific picture screen i OP Version 1 10 CI Version 1 10 PLC Version 2 08 Siemens Numerical Control Ltd i i OEM ...

Page 28: ...ators Element Indicator Meaning Monitoring screen Main screen Display the working status of injection molding machine The purge and lubrication can be controlled Information screen Display the system infomation OEM picture and the status of input outputs Alarm screen Display 32 alarms and events Temperature screen Display the set value and actual value of 5 1 temperature channels 1 Current screen ...

Page 29: ...process parameters for 3 stages mold open 4 stages mold close Ejector setting screen Set the process parameters for 3 ejector advance retract modes and ejector mode Carriage setting screen Set the process parameters for carriage advance retract and charging mode Injection setting screen Set the process parameters for 4 injection modes 3 pressure holding modes and switch mode Charging setting scree...

Page 30: ... when the set product counter is full 2 Current status Mold adjustment status This indicator is flashing under mold adjustment status There are two modes auto adjustment mode and pulse mode 3 Cooling time status This indicator is flashing during cooling When cooling time is over it will stop flashing 4 Lubrication status This indicator is flashing during lubrication When lubrication is over it wil...

Page 31: ...the indicated step 2 when a parameter block is not backlighting it means this block is allowed to be set if a block is backlighting then this block is parameter displaying 3 if the screen with cursor function selection it is requested to use the cursor first Move the cursor to the wanted item and press the Selection key Then press cursor up or down key to select the function and use Enter key to c...

Page 32: ...t key F1 Used as event record information OEM picture and function selection 2 Soft key F2 When there is a second screen this key is normally used as page down Also it could be used for other functions e g purge key 3 Soft keys F3 F5 Soft keys with assigned functions 4 Soft key F6 Always as return key the key to go back previous screen ...

Page 33: ... 10 CI Version 1 10 PLC Version 2 08 Siemens Numerical Control Ltd i i OEM SIJECT OP15B System Information Fig 3 4 Information screen 1 SIJECT 16i Tel 86 25 2101888 Fax 86 25 2101666 Siemens Numerical Control Ltd Nanjing P R China Starting please wait Fig 3 5 Information screen 1 1 OEM picture ...

Page 34: ...SIJECT OP15B Screens SIJECT 16i Operation Manual 3 8 Fig 3 6 Information screen 1 2 Digital inputs Fig 3 7 Information screen 1 3 Digital outputs ...

Page 35: ...ill backlight if there is a signal See Fig 3 6 Information screen 1 2 digital inputs Users can check the status of each input output Press soft key F4 to display the status of all 40 digital outputs The box will backlight if there is a signal See Fig 3 7 Information screen 1 3 digital outputs Force Output is to make certain point force output For example input 3 4 and press softkey F2 Force Output...

Page 36: ...SIJECT OP15B Screens SIJECT 16i Operation Manual 3 10 3 1 2 Monitoring screen Fig 3 9 Monitoring screen 1 Fig 3 10 Monitoring screen 1 1 event record ...

Page 37: ...d screen See Fig 3 10 Monitoring screen 1 1 event record screen If there is event message during operation then indicator see table 3 1 is flashing Users should check this screen and take correction activities It is different from alarms Press soft key F2 on monitoring screen 1 to enter the purge screen and the purge time or purge counting can be set Then press softkey F1 Start purge to start the ...

Page 38: ...SIJECT OP15B Screens SIJECT 16i Operation Manual 3 12 3 1 3 Alarm screen Fig 3 12 Alarm screen 1 Fig 3 13 Alarm screen 1 1 event record screen ...

Page 39: ... to check the alarm screen On the alarm screen the box in front of the current alarm is backlight Then users should take corresponding correction activities to clear alarm resource and press acknowledgment key or manual mode key to acknowledge and delete the alarms Press soft key F1 to enter the event record screen See Fig 3 13 Alarm screen 1 1 event record screen This screen can also be called by...

Page 40: ...3 14 Fig 3 15 Historical Alarm Operating sequences Press Alarm key to enter Alarm screen 1 On Alarm screen 1 press softkey F3 to enter Historical Alarm screen See Fig 3 15 The names of alarm as well as their date and time are displayed on this screen ...

Page 41: ...se is 20s and nozzle is set as 30 Then heating time is 20 x 30 6s and heating off time is 14s If the nozzle is under close loop control the upper and lower tolerance can be set here which is valid for all temperature zone When the temperature is within specification channel heating will maintain the temperature within this range The indicator see table 3 1 will stop flashing which means the screw ...

Page 42: ...s softkey F3 to enter Preheating setting screen See Fig 3 17 Temperature Screen 1 1 Preheating setting Preheating time can be set here Current Time display the current time of the system Time set the time to start preheating Preheating time can be set for each day The clock mode is 24 hours Preheat select or deselect preheating ...

Page 43: ...cond Set Time input the actual time if the displayed current time is not correct Example Set the actual date 1 Press the Cursor keys and move the cursor to year field of SetDate and input actual year such as 2003 by number keys Confirm the entry by Enter key 2 If you have confirmed the year entry the cursor will move to month field automatically Then input actual month by number keys Confirm your ...

Page 44: ...terial has enough time for cooling Charging delay TdCha It is the interval time between injection and charging which is to prevent the overheating of plastic material Injection delay TdInj When the carriage arrives at the injection position it will wait certain time before injection Core in delay TdCorIn When previous work is finished core in will begin after a delay time Core out delay TdCorOut W...

Page 45: ...which is monitoring time There is alarm if the setting time is exceeded Ejector retract time TmEjeRet The total time for ejector retract which is monitoring time There is alarm if the setting time is exceeded Pre decompression time TmPreDec The total time for pre decompression which is monitoring time There is alarm if the setting time is exceeded Decompression time TmDec The total time for decomp...

Page 46: ...et on this screen Part counter Part Count Set the production quantity Part numbers for each mold Part Nr Mld Set the production quantity for each mold Shots counter Shot Count Display the number of shots Parts of this power on Parts from Startup Display the production quantity of current power on Softkey F1 Clear shot Press this key and the injection time will be reset Softkey F2 Clear part Press ...

Page 47: ...therwise back light will be turned off if there is no key pressed during 10 minutes Language Select English or Chinese Examples For robot selection you can do as follows 1 Press key or to enter the robot setting field 2 Press key for the first time it is required to input password 1 of 1111 then confirm the entry by Enter key 3 Cursor is at selection field press or to select 4 Press Enter key to c...

Page 48: ...0 recipe data can be loaded from CI Example For MMC selection you can do as follows 1 Press or key to move the cursor to the save load medium field 2 Press selection key for the first time it is required to input password 1 of 1111 then confirm the entry by Enter key 3 Press or key to select the MMC card 4 Press Enter key to confirm the selection When saving the current recipe parameter to the MMC...

Page 49: ...d press page down key F2 on this screen to enter the Data screen 2 See Fig 3 23 Data screen 1 and Fig 3 24 Data screen 2 Data screen provides the important data of the latest 10 shots the latest one is always on the top Shot Shot number The latest shot is always on the top Mold open end MldOpn End position of mold open in mm Start injecting InjStr Start position of injection in mm ...

Page 50: ... mm Ejector advance end EjeEnd End position of ejector advance in mm Mold protection time MProTm Time of low pressure mold protection in second Mold lock time MLckTm Time of high pressure mold lock operation in second Injection time InjTm Total time of 4 stages injection in second Cycle time CycTm Time record of every machine cycle in second Charging time ChaTm Time record of every charging operat...

Page 51: ...se mode Lubrication error LubErrNSTD Contactor in alarm circuit can be set as normally open mode or normally close mode Fast mold open FastMldOpn It can be set as normal mode or special mode Motor protection MotStrPro Motor protection can be selected i e if there is delay time during motor star triangle startup Motor protection can also be deselected Special function 1 SpecSel 1 Spare Special func...

Page 52: ...rance when mold open MldOpnTol Set the tolerance of mold open Range 1 0 99 9 mm Special parameter 3 SpecPar 3 Spare Special parameter 4 SpecPar 4 Spare Example Select Position at Carriage retract mode CarRetMod 1 Press or key to move the cursor to carriage retract mode field 2 Press key to start the setting mode 3 Press or key to select Position mode 4 Confirm the setting with Enter key ...

Page 53: ...scale can be set here ranged from 1 6553mm Actual value displayed value Display the actual value of linear scale Current value displayed value It is the difference from actual value to reference point Linear scale injection Reference point setting value Reference point of linear scale can be set here Length setting value The length of linear scale can be set here ranged from 1 6553mm Actual value ...

Page 54: ...linear scale Length setting value The length of linear scale can be set here ranged from 1 6553mm Actual value displayed value Display the actual value of linear scale Current value displayed value It is the difference from actual value to reference point Linear scale ejector Linear scale ejector can be selected or deselected here ...

Page 55: ... value of this system is 2000 Retype Password 2 retype the new password 2 and confirm it with Enter Key When the password has been successfully changed the screen will display a message Press Acknowledgment Key to finish the operation Low Higher password it is the password level 2 The default value of this system is 2000 then confirm it by Enter Key New password 1 a new password 1 can be set here ...

Page 56: ...n in MMC Operating examples To select Menus in Program types Steps are as follows 1 Press cursor key or to enter program type selection 2 Press Selection Key and the cursor moves to the left 3 Press cursor key or to select Menus 4 Press Enter Key to confirm Download Menus from MMC Steps are as follows 1 Plug in MMC card in the CI this operation should be done after turning off the power 2 Select M...

Page 57: ...art valve adjustment Valve Type select the type of valve flow pressure back pressure reserved Valve Limit select min max value Pressure Test in force output mode input pressure value ranged from 0 140bar Flow Test in force output mode input flow value ranged from 0 100 BackPressure Test in force output mode input pressure value ranged from 0 140bar Operating sequences Firstly start valve adjustmen...

Page 58: ... key or to select Max 4 Confirm it with Enter Key 5 Press softkey F3 to increase the Max or use softkey F4 to reduce Max This process can be observed by external amperemeter After finishing the adjustment of the valves Select OFF to stop valve adjustment Lastly check the adjustment result In the Force Output mode implement the Pressure Test 1 Press softkey F2 Force Output and the upper box will ba...

Page 59: ... softkey F2 to enter service screen 2 linear scale setting Then press softkey F2 to enter pump combination setting screen See Fig 3 30 Service Screen 2 1 pump combination setting Pump2 pump3 pump4 can be selected here and the flow can be set accordingly Pump2 Flow flow range 0 100 Pump3 Flow flow range 0 100 Pump4 Flow flow range 0 100 ...

Page 60: ...tion count can be set here Lubrication Time every lubrication time can be set here ranged from 0 0 99 9sec Lubrication Count set the numbers of injection cycles When the cycles have been finished the system will be lubricated automatically The range is from 1 to 32767 Lubrication Status Press softkey F1 manual lubrication to start the lubrication then the box will backlight and is flashing Lubrica...

Page 61: ...t the upper limit of hydraulic oil temperature Oil Lower set the lower limit of hydraulic oil temperature Temperature Compensation set the temperature compensation The system has been set the compensation before delivery and it is unnecessary for users to set it again Nozzle Mode two modes are available it can be assigned as close loop or open loop Channel 1 select or deselect Channel 2 select or ...

Page 62: ...each and the range is from 0 to 99 The values should be the differences for pressure and flow between every two PLC cycles when there is action switch Charge it refers to the ramps when charging starts and charging completes set pressure and flow for each and the range is from 0 to 99 The values should be the differences for pressure and flow between every two PLC cycles when there is action switc...

Page 63: ...it is the ramp for core 1 in out set pressure and flow for each and the range is from 0 to 99 The values should be the differences for pressure and flow between every two PLC cycles when there is any action switch Core 2 3 the operating sequence is same as Core 1 ...

Page 64: ...Mold close fast MldClo 2 set position pressure and flow Mold protection with low pressure MldPro set position pressure and flow In addition to protect mold from particles users can set mold protection time here If mold protection with low pressure cannot be finished within the set time the mold will retract to the end position of mold open and send alarm Mold lock with high pressure MldLck set the...

Page 65: ...old open Mold open tolorence MldOpnTol set the allowed tolorence of mold open end position When mold is within this tolorence then the system will consider the mold is opened to the end Mold position MldPos display the actual position of the mold Press key to close the mold manually and press key to open the mold manually ...

Page 66: ...and flow for ejector retract 1 Ejector retract 2 EjeRet 2 During ejector retract users can set position pressure and flow for ejector retract 2 Vibrating position Vibrate Set position here Ejector retracts to this position and then advances This is so called vibration ejection Ejector backward indicator EjeBck when ejector retracts to the end position this indicator will backlight indicating that ...

Page 67: ...ration Manual 3 41 Ejection counter Eje Count when ejector multiple vibration mode is selected users can set the numbers of ejection Press key to forward ejector to remove part from mold manually and press key to retract ejector manually ...

Page 68: ...rriage retract The time set here is used for controlling carriage retract when timer is selected as carriage retract mode When the time is expired carriage retract will be finished Feeding mode Feed mode there are three modes for feeding fixed front and back Fixed feeding the carriage is fixed first charging then decompression Front feeding the carriage is at the front first charging then decompre...

Page 69: ...sure and flow of injection 2 Injection 3 Inject 3 set the position pressure and flow of injection 3 Injection 4 Inject 4 set the position pressure and flow of injection 4 The time is set for the whole injection actions Transfer mode TraMode it refers to the transfer mode between injection and pressure holding Three modes can be selected Position mode Time mode and Position Time mode Holding 1 set ...

Page 70: ...ressure holding If Position mode is selected then the set time is monitoring time The alarm is warning when the time is exceeded If Time mode is selected then the set time is control time The set position value is invalid If Position Time mode is selected then the one who reaches the set value first takes the priority ...

Page 71: ...ion pressure and flow for charging 2 If proportional backpressure valve is used then the value should be set as backpressure Charging 3 set the position pressure and flow for charging 3 If proportional backpressure valve is used then the value should be set as backpressure Charging 4 set the position pressure and flow for charging 4 If proportional backpressure valve is used then the value should ...

Page 72: ...splayed Core 1 out set the pressure and flow for core 1 out If it is by position then position value should be set If it is by time then the time should be set as a parameter and the actual time will be displayed If it is by counter then the counter should be set and the actual counting value will be displayed Core 1 selection CorSelect select or deselect core 1 in out Core 1 mode CorMode select p...

Page 73: ... will be displayed Core 3 out set the pressure and flow for core 3 out If it is by position then position value should be set If it is by time then the time should be set as a parameter and the actual time will be displayed If it is by counter then the counter should be set and the actual counting value will be displayed Core 3 selection CorSelect select or deselect core 3 in out Core 3 mode CorMo...

Page 74: ...layed Core 2 out set the pressure and flow for core 2 out If it is by position then position value should be set If it is by time then the time should be set as a parameter and the actual time will be displayed If it is be counter then the counter should be set and the actual counting value will be displayed Core 2 selection CorSelect select or deselect core 2 in out Core 2 mode CorMode select pos...

Page 75: ...peration Manual 3 49 Fig 3 42 Core 2 in out screen 2 On Core 2 screen 1 see Fig 3 41 press softkey F5 to enter Core 2 screen 2 See Fig 3 42 Core 3 in out can be set here The operation of core 3 is the same as described in section 3 2 6 ...

Page 76: ...aches the position air can blow by the set time Air blow 1 Air 1 select or deselect the air blow 1 When the mold reaches the position air blow will be controlled by the set time Air blow 2 Air 2 select or deselect the air blow 2 When the mold reaches the position air blow will be controlled by the set time Mold position MldPos display the actual position of mold Press Manual Air blow 1 to activate...

Page 77: ...n the preset time then the system will retract the mold automatically Mold close during mold adjustment MldClo in mold adjustment mode set the pressure and flow during mold close Mold open during mold adjustment MldOpn in mold adjustment mode set the pressure and flow during mold open Carriage movement during mold adjustment Carriage in mold adjustment mode set the pressure and flow during carriag...

Page 78: ...CloTim in Auto adjustment mode set the mold close time for mold adjustment Users can set an initial value and the system will judge it automatically If the mold cannot be adjusted within this time then the system will retract the mold to fulfil automatic adjustment Auto mold adjustment AutoAdj select or deselect Current status CurStatus display the pressure and flow of current system When pulse ad...

Page 79: ...a For Publication Manual SIJECT 16i Operation Manual Software Version 1 User Documentation From Name User Manual Order No 6AT1931 5AB41 0BA1 Edition 11 2003 Company Dept Address Telephone Fax Should you come across any printing errors when reading this publication please notify us on this sheet Suggestions for improvement are also welcome Suggestions and or corrections ...

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