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Technical Specifications

General

VT300 Technical Manual, Rev. A4

Doc

TM-VT300-EN

1 Technical

Specifications

1.1 General

CPU

MCU 89C51RD, 64KB Flash ROM, 1KB RAM, 64KB serial EEPROM, real-time clock.

Communication

•

Serial port 1: RS232C Full duplex, 2400 baud, 1 start, 7 data bits/even parity
or 8 data bits/no parity.

•

Serial port 2: (optional): RS232 or RS485 half duplex, 2400-57600 baud, no
or even parity, 7 or 8 data bits.

Display

16 character LCD display (14.5mm height).

Annunciators

Net, no motion, minus sign, zero, range 1 and 2.

Keyboard

27-key membrane type with tactile feedback.

Approvals

EU type approval, 10,000 divisions, 0199.62.

Accuracy class

III.

Resolution

Selectable up to 990.000dd (in accordance with regulations).

Max tare effect

Full scale (100%).

Auto zero track

Off or 0.5dd, setup-selectable.

Weight digits

4, 5 or 6.

Weight steps

1, 2, 5, 10, 20, 50, 100, 200.

Digital filter

FIR automatically adjusted to conversion speed, plus post filtering (rolling
average of 1, 2, 4, 8, 16, 32 samples).

Calibration methods

Dead load, span and scale parameters via keyboard commands. Calibration can
be performed either by weighing or by entering load cell mV values.

Self diagnostics

Hardware and software – MCU watchdog.
Memory failure and I/O failure – program check.

Summary of Contents for VT300

Page 1: ...VT300 Weighbridge Indicator Technical Manual Revision A4 September 2006 Doc TM VT300 EN ...

Page 2: ... ANALOG OUTPUT OPTIONAL 16 1 4 DIGITAL INPUT 17 1 5 DIGITAL OUTPUTS 17 2 INSTALLATION 18 2 1 SITE REQUIREMENTS 18 2 2 MOUNTING THE INDICATOR 18 2 2 1 Desktop Model Aluminum Enclosure 18 2 2 2 Wall Mount Model Stainless Steel Enclosure 19 2 3 CONNECTING LOAD CELLS 20 2 3 1 Desktop Model Aluminum Enclosure 20 2 3 2 Wall Mount Model Stainless Steel 21 2 3 3 Load Cell Operating Parameters 21 2 4 SERIA...

Page 3: ...Main TFILE 29 Main MISC 30 Main SYSTEM 30 Main SYSTEM cont 31 4 CALIBRATION 32 4 1 SELECTING CALIBRATION METHOD 32 4 2 CALIBRATION WITH STANDARD WEIGHTS 33 4 2 1 Zero Dead Load Calibration 33 4 2 2 Span Calibration 33 4 3 ELECTRONIC CALIBRATION E CAL 34 4 3 1 Calculating Calibration Values 34 4 3 2 Setting Zero Calibration Dead Load Value 35 4 3 3 Span Max Capacity Calibration 35 4 4 STORING CALIB...

Page 4: ...uous Weight Output 46 6 3 2 Continuous Weight Output with Dual Scale Operation 47 6 3 3 Continuous Weight With Tare 47 6 3 4 Alibi Transmit 49 6 3 5 Alibi Mode Commands 49 Transmit Displayed Weight 49 Command ZERO 49 Character for Print on Demand 50 6 3 6 EDP Protocol Output 50 6 3 7 Remote Printer Output 51 6 3 8 Master Slave Protocol 51 Master Slave Commands 53 Gross Tare Net Weight Transmission...

Page 5: ...S 69 8 1 1 Setting and Changing System and Operator Password SYSTEM PIN 69 8 1 2 Setting Date Time and Serial Number SYSTEM DATE 70 8 1 3 Resetting Parameters INIT 70 8 1 4 Displaying Remaining Battery Capacity WEIGH BATTERY 71 8 1 5 Checking Calibration Seal MISC 1 2OIML 71 8 1 6 Viewing Load Cell mV TEST CVM 71 8 1 7 Viewing A D Count TEST A D 71 8 1 8 Locking and Unlocking Keys 72 8 2 TESTING T...

Page 6: ...nd General Errors 78 10 1 2 Printing and EDP Protocol Errors 79 10 1 3 Weighing and Counting Errors 79 10 1 4 Alibi Memory and Accumulated Total Errors 80 10 2 CHECKING LOAD CELL CONNECTION 80 10 3 CHECKING POWER SUPPLY 80 10 4 CHECKING DIGITAL OUTPUTS 80 APPENDIX A TECHNICAL DRAWINGS 81 CONTACTING VISHAY TRANSDUCERS 86 ...

Page 7: ... FOR DESKTOP MODEL 20 FIGURE 4 LOAD CELL CONNECTION DIAGRAM FOR WALL MOUNT MODEL 21 FIGURE 5 PRINTER AND PC CABLES CONNECTION DIAGRAM 22 FIGURE 6 RS485 CABLE CONNECTION DIAGRAM 23 FIGURE 7 POWER CABLE CONNECTION DIAGRAM 23 FIGURE 8 NON REMOVABLE STICKER 36 FIGURE 9 LEAD WIRE SEAL HARD PLASTIC STICKER 36 FIGURE 10 WALL MOUNT MODEL SEALING INSTRUCTIONS 37 FIGURE 11 DIGITAL OUTPUT AND TILT SWITCH CON...

Page 8: ...ed hereunder and you agree that no such right license or interest shall be asserted by you with respect to such trademark You shall not copy reverse compile or reverse assemble all or any portion of the Manual or the Product You are prohibited from and shall not directly or indirectly develop market distribute license or sell any product that supports substantially similar functionality as the Pro...

Page 9: ...om personal injury Some states do not allow the exclusion or limitation of incidental or consequential damages for consumer products so the above limitations or exclusions may not apply to you The Purchaser agrees that the Purchaser is responsible for notifying any subsequent Buyer of goods manufactured by Vishay Transducers of the warranty provisions limitations exclusions and disclaimers stated ...

Page 10: ...or to other devices remove jewelry or any other metallic object that may come into contact with energized parts The product is intended to be grounded during normal use Grounding is provided by connecting the mains plug to a wall socket with a protective earth terminal The earth lug provided on the product should be connected to the protective earth at all times by a wire with a diameter of 18AWG ...

Page 11: ...of emergency make sure that a readily accessible circuit breaker or emergency switch is installed in the building Operating Environment Ambient Temperature Storage temperature 10C to 70C 14F to 158F Operating temperature 10C to 40C 14F to 104F Humidity 40 to 90 RH non condensing Vibration Severe vibration can affect the accuracy of weighing and damage components Air The air surrounding the product...

Page 12: ...o the requirements of the Council Directive 90 384 EEC as amended and to the requirements of the following EC Directives EN 45501 1994 The Metrological Aspects of Non Automatic Weighing Machines EN 55022 1987 Limits and Methods of Measurement of Radio Interference Characteristics of Information Technology Equipment EN 60950 1992 Safety of Information Technology Equipment Date April 30 2004 Signatu...

Page 13: ... of menus submenus and options Pg 24 4 Calibration Performing standard weight calibration and electronic calibration Pg 32 5 General System Parameters General parameters in the SYSTEM 1 2CAL PAR SYSTEM SET OPER and SYSTEM PRP menus Pg 38 6 Serial Communication Setting up communication with printers host PCs and other external devices Pg 43 7 Outputs and Digital Input Connecting and using the digit...

Page 14: ...lasses methods arguments exceptions properties etc Also used for special terms the first time they appear Monospace Text displayed on the LCD or on a computer attached to the product Notes which offer an additional explanation or a hint on how to overcome a common problem Warnings which indicate potential safety hazards regarding product operation or maintenance to operator or service personnel ...

Page 15: ...d 2 Keyboard 27 key membrane type with tactile feedback Approvals EU type approval 10 000 divisions 0199 62 Accuracy class III Resolution Selectable up to 990 000dd in accordance with regulations Max tare effect Full scale 100 Auto zero track Off or 0 5dd setup selectable Weight digits 4 5 or 6 Weight steps 1 2 5 10 20 50 100 200 Digital filter FIR automatically adjusted to conversion speed plus p...

Page 16: ...ts max Conversion speed 3 7 14 28 57 70Hz selectable Linearity Within 0 002 of full scale Span temp coefficient 2ppm C Zero temp coefficient 2ppm C Long term stability 0 005 of full scale per year 1 3 Analog Output Optional If no analog output is needed a second analog input may be added see 1 2 above Analog Output is Powered by an external 24VDC See section 7 1 2 for specification Current or volt...

Page 17: ...ut voltage 9 24VDC positive common optoisolated to 2 5kV Input resistance 3 3KΩ On delay 2msec max Off delay 2msec max 1 5 Digital Outputs Output voltage 24VDC 10 transistor source darlington positive common Max current 100mA leakage current 100µA Max off state voltage 30VDC On delay 2msec max Off delay 2msec ...

Page 18: ...nit should be placed at the correct height to allow easy reading of the display and convenient keyboard operation 2 2 Mounting the Indicator 2 2 1 Desktop Model Aluminum Enclosure All connections to the instrument are made through the rear panel connectors Strain relief clamps should be used The shield should be connected to the metal frame of the connector The rear of the VT300 desktop model is s...

Page 19: ...mount model front and rear views To connect the indicator to the stainless steel wall mount 1 Remove the rear panel and lift it carefully 2 Insert the cables via the cable glands Strip and connect the cables as detailed in sections 2 3 2 4 and 2 5 3 Connect the cable shield either between the plastic and the metal case of the cable glands or to the screws supporting the PCBs 4 Re install the rear ...

Page 20: ...diagram below Figure 3 Load cell connection diagram for desktop model 1 2 3 4 5 6 7 I1 CI O1 O2 Co LOAD CELL 1 Pin Description 1 Excitation 2 Sense 3 Sense 4 Excitation 5 Signal 6 Signal D Type Metal Case Shield 7 8 Calibration Enable COM 2 COM 1 Load Cell 2 or Analog Output Load Cell 1 DB9 fem DB9 male DB15 fem male DB15 fem LOAD CELL 2 DB15 F Pin Description 1 Excitation 2 Sense 3 Sense 4 Excita...

Page 21: ...mV gain permitted is between 0 25 and 1 75mV V For load cell output of 20mV gain permitted is between 0 25 and 3 75mV V The load cells must be chosen so that the input signal to the controller is at least 0 4µV per scale increment For load cell output less than 0 4µV digit the controller will still be stable but the full temperature range accuracy is not guaranteed Do not run signal cables togethe...

Page 22: ...card to which you should attach the individual wires 2 4 2 RS485 Cable Connections The terminal block on the RS485 board enables connecting two pairs of wires A B One wire pair for connecting the incoming cable A second wire pair for a daisy chain connection to the next unit on the RS485 bus Max 15m Max 15m To PC DB25 Female Printer DB25 Male DB9 Metal Case 3 5 2 3 5 2 DB9 Fem DB9 Metal Case DB9 F...

Page 23: ...t is properly protected For optimum EMC performance keep the length of cable shielding inside the enclosure as short as possible Figure 7 Power cable connection diagram 1 2 3 4 5 6 7 I1 CI O1 O2 Co Pin Description 1 2 Power 9 15 VDC 3 Input 1 4 Input Common 5 Output 1 6 Output 2 7 Output Common COM 2 COM 1 Load Cell 2 or Analog Output Load Cell 1 DB9 fem DB9 male DB15 fem male DB15 fem Network Bia...

Page 24: ...n and off and perform the most common operations A navigation area to the right of the display allows you to access and navigate the menu which contains more advanced operations An alphanumeric keypad with 12 green keys allows you to enter numbers and letters 3 1 The Display The VT300 has an LCD display There are three status annunciators on the left of the display and two more on the right of the...

Page 25: ...display shows the sum of the weight on scales 1 and 2 W1 The scale is currently in weight range 1 W2 The scale is currently in weight range 2 3 1 2 Common Messages Shown on the Display Message type Meaning 352 0 Weight of the item on the scale 24509 Approximate number of units on the scale 319 0 active Net weight or number of units calculated after subtracting the container s weight OVER RANGE Ove...

Page 26: ... 3 3 When you press this key the current weight is printed to the printer output to an attached computer and added to the accumulated total Printing Section 6 2 1 Press to switch between Weighing Mode and Counting Mode Counting pieces weighing User s Guide chapters 4 6 Press to turn the indicator on or to switch it off when it is running Starting the indicator Press to perform a first weighing of ...

Page 27: ...ion entered Clears the characters entered 3 3 The Menu The menu accessed by pressing the MENU key allows you to perform advanced operations like high resolution weighing printing and viewing alibi memory This subchapter explains how to use the menu and provides a summary of its functions All operations are explained in more detail further in this document 3 3 1 Using the Menu To access a function ...

Page 28: ...meters calibration analog output settings communication settings ticket customization weighbridge customization tilt switch settings setpoint settings test operations Section 3 3 2 MAIN SYSTEM Main WEIGH Menu option Submenu option Description Refer to BATCH WEIGH Prints a series of truck weighings as a unified ticket Section 9 2 PCS CNT Switches to Counting Mode User s Guide chapter 6 SETP Shows s...

Page 29: ...ide section 9 1 CSUM Checks V File memory User s Guide section 9 3 DEL TARE Deletes all truck tare values User s Guide section 9 4 FIRST Deletes all first weighings User s Guide section 9 4 ALL Deletes the entire V File User s Guide section 9 4 SELECT Deletes a record for a specific truck User s Guide section 9 4 SIZE Shows the number of records stored in the V File and space available User s Guid...

Page 30: ... password Section 8 1 1 PIN OPER Setting and changing operator password Section 8 1 1 PRP Contains one parameter S EMPTY Chapter 5 1CAL PAR Scale 1 parameters including number of display digits position of decimal points A D gain zero range Section 5 2 ZERO Dead load calibration standard or electronic for scale 1 Sections 4 2 1 4 3 2 SPAN Maximum weight calibration standard or electronic for scale...

Page 31: ...tion 6 2 2 INIT Resets all parameters in the SET menu Section 8 1 3 FORM DOWNLOAD DEFAULT Downloads custom ticket formats and resets ticket formats to default Section 6 5 REFR EDIT Allows viewing and editing weighbridge descriptions Section 9 1 TILT Tilt switch settings Section 7 5 SETP Allows viewing and editing setpoint values both setpoints Section 7 3 1 LOCK KEY Allows locking and unlocking ke...

Page 32: ...e has its own calibration parameters all the parameters in the 1CAL menu relate to scale 1 while all the parameters in the 2CAL menu relate to scale 2 After calibrating the scale you must store calibration data in persistent memory see section 4 4 and seal the calibration lock see section 4 5 4 1 Selecting Calibration Method Before calibrating the scale you should select the calibration method sta...

Page 33: ...nd navigate to SYSTEM 1CAL ZERO Or if you wish to calibrate scale 2 navigate to SYSTEM 2CAL ZERO 2 Press ENTER The display shows EMPTY SCALE Clear the scale and wait about 10 seconds 3 Press ENTER to record the zero position The display shows WAIT as 64 measurements are taken and an average calculated This should take about 10 seconds 4 The display should now show 0 If the zero point is not accura...

Page 34: ...sed to lock calibration see section 4 5 4 3 1 Calculating Calibration Values Consider the following example A scale has maximum capacity 30 60kg e 0 010 0 020kg with 4 load cells each with rated capacity 50kg 2mV and dead load 1 940kg The load cell data as noted in the manufacturer data sheet is shown in the following table Load cell Output at 50kg Zero balance L C1 1 9793mV 0 0257 mV L C2 1 9392m...

Page 35: ...ration To set the span calibration value electronically 1 Press MENU and navigate to SYSTEM 1CAL SPAN Or if you wish to calibrate scale 2 navigate to SYSTEM 2CAL SPAN 2 Press ENTER The display shows L C OUT 00000 3 Enter the overall mV of the scale s maximum capacity using the numeric keypad see section 4 3 1 to learn how to calculate it 4 Press ENTER to confirm the maximum capacity calibration va...

Page 36: ... counter allows the authorities to check if any calibration attempt has been made since the last inspection A label with an inscribed count all digits are permanently printed and suffixed by a hyphen is placed on the rear side of the instrument The label is designated CAL Nr and may not be removed without destroying it Seals bear the verification mark of a notified body or an alternative mark of t...

Page 37: ...ing Load Receptor You can inscribe the serial number of the load receptor as part of the indicator identification label The load receptor bears the serial number of the indicator on its data plate 4 5 3 Checking Seal Status and Audit Trail Counter In order to check whether the jumper is still in the sealed position and that the audit trail counter has not changed To check seal status and audit tra...

Page 38: ... menus OPER and PRP apply to both of them Parameters you define in SYSTEM 1CAL PAR refer to scale 1 only and parameters defined in SYSTEM 2CAL PAR refer to scale 2 only Other menus allow you to calibrate the scale see chapter 4 set communication parameters see chapter 6 and set input output parameters see chapter 7 5 1 Editing Parameters To edit parameters in one of the menus 1 Press MENU and navi...

Page 39: ...dered low 3 is normal and 5 is high 0 5 07 CONV RATE Number of conversions per second If there are two scales connected the sum of their conversion rates 6P 6P must be less than 70 Otherwise the unit sets CONV RATE 14 for each scale 3 7 14 28 57 70 08 MOTION SAMPLES No motion samples Number of samples for no motion detection 1 is considered low 7 is considered high 1 7 09 AUTO Z TRACK Auto zero tr...

Page 40: ...capacity 2 10 18 DUAL MODE Dual interval or range INTERV specifies that the lower display division should be selected at the defined internal value RANGE specifies that the lower display division should be selected at zero weight INTERV RANGE 19 DUAL RANGE First two digits defining the limit between the two ranges where the lower display division will be selected automatically Max1 00 99 20 PR BEL...

Page 41: ...y for switching between Scale1 S1 on the display Scale2 S2 on the display or sum of Scale1 and Scale2 S0 on the display 5 3 SYSTEM SET OPER Parameter Description Values 01 TOTALIZING M Enable totalizer YES enables the accumulated total function for users NO disables it YES NO 02 WEIGHING MEM Store first weighing in memory If set to NO first weighing information is discarded and cannot be accessed ...

Page 42: ... is saved to memory unless WEIGHING MEM NO YES NO 07 USER FORMS Custom weighbridge descriptions and printing formats YES specifies that service personnel should be able to define custom weighbridge descriptions reference codes and custom print formats NO specifies that only the default weighbridge descriptions and print formats should be available YES NO 08 KEY IN TIME Time for character selection...

Page 43: ...ity or 8 data no parity 1 stop bit Handshake DTR BUSY per character for fanfold printers or REQUEST PAPER END STATUS for EPSON TM 295 slip printer Connection Cable gland stainless steel enclosure or DB9 male on rear panel aluminum enclosure J1 or J3 Three conductor shielded cable max distance 15m Tx Pin 3 Rx DTR Pin 2 GND Pin 5 6 1 2 RS485 Serial Port Used to connect to a host computer remote prin...

Page 44: ...LIBI transmit alibi memory See section 6 3 4 9600T set baud rate to 9600 transmit only NONE deactivate the port The 1COM menu has additional parameters related to port 1 output detailed below Parameter Description Values PARITY DATA Parity bits Specifies whether there should be even parity with 7 data bits E7 or no parity E8 E7 E8 PRN TYPE Printer type Specifies which type of printer is connected ...

Page 45: ...A Y A network address participate in a network of several indicators as slave with this address See section 6 3 8 The 2COM menu has additional parameters related to port 2 output detailed below Parameter Description Values PARITY DATA Parity bits Specifies whether there should be even parity with 7 data bits E7 no parity with 7 data bits N8 or no parity with 8 data bits E8 E7 N8 E8 PRN TYPE Printe...

Page 46: ...quired Used mainly for remote display or PC The structure of the transmitted data block is shown below Data Block Composition Byte Name Description 1 Weight status Bit0 0 Normal 1 No weight display Bit1 0 Gross 1 Net Bit2 0 No Auto zero 1 Auto zero Bit3 0 Within range 1 Out of range Bit4 0 No standstill 1 Standstill Bit5 0 Normal 1 Under minimum weighing range Bit6 Always 1 Bit7 Zero or parity 2 P...

Page 47: ... SYSTEM SET 2COM W2OUT Data Block Composition for Each Scale Byte Name Description 1 Weight status Bit0 0 Normal 1 No weight display Bit1 0 Gross 1 Net Bit2 0 No Auto zero 1 Auto zero Bit3 0 Within range 1 Out of range Bit4 0 No standstill 1 Standstill Bit5 0 Normal 1 Under minimum weighing range Bit6 Always 1 Bit7 Zero or parity 2 Polarity or 3 8 Weight 6 digits including decimal point if any 9 S...

Page 48: ...t6 Always 1 Bit7 Zero or parity 2 Polarity or 3 8 Weight 6 digits including decimal point if any 9 N Indicates that the preceding weight is net 10 15 Net weight 6 digits including decimal point if any 16 T or P T specifies that the preceding weight is a manual tare P specifies that the preceding weight is a preset tare 17 22 Gross weight 6 digits including decimal point if any 23 G Indicates that ...

Page 49: ...ived The output data block is as shown below Byte Name Description 1 Weight status Bit 0 0 Normal Bit 1 0 Gross Bit 2 0 No Auto zero Bit 3 0 Within range Bit 4 0 No standstill Bit 5 0 Normal Bit 6 Always 1 Bit 7 Zero or parity 1 No weight display 1 Net 1 Auto zero 1 Out of range 1 Standstill 1 Under minimum weighing range 2 Polarity or 3 8 Weight 6 digits including decimal point if any 9 Sync Carr...

Page 50: ...col Workflow 1 Within 5 seconds of initialization the PC requests data by sending an ENQ 05h command If it doesn t send an ENQ the indicator shows error 30 host not ready 2 After the ENTER button is pressed the indicator transmits weight information according to the currently selected print format using the standard data block composition shown below 3 Within 5 seconds of transmission the PC eithe...

Page 51: ... XORSUM of all data characters STX ETX inclusive 6 3 7 Remote Printer Output Works With Ports Port 2 RS485 or RS232 Description Used to transmit the data printed on the local printer to a remote printer No handshake is required 6 3 8 Master Slave Protocol Works With Ports Port 2 RS232 or RS485 Description The indicator participates in a network of several indicators In such a network all slave uni...

Page 52: ...s are encountered NO specifies that the operator may not manually disable master slave protocol communications YES NO X MIT RESULT Transmit individual weighings YES specifies that the indicator should send individual weighings to the host NO specifies that only the start and stop reports should be sent to the host YES NO KBD COM DS Accept keyboard commands from host YES NO Working With Local and R...

Page 53: ...espond within 3 4 character time e g with 9600 baud the character time 1msec the master should expect reception of STX from the slave within 5msec after the ETX was transmitted from the master Master Transmission STX ADD 0 BCS2 BCS1 ETX Example STX ADD 0 BCS2 BCS1 ETX Hex 2 41 3F 30 3C 34 3 Ascii STX A 0 4 ETX ADD is one of the address sets in SYSTEM SET 2COM OPERATION M S A Z CheckSum is calculat...

Page 54: ...int 1 Setpoint 2 are active Status Byte B7 B6 B5 B4 B3 B2 B1 B0 Zero or Parity 1 Under Min Weighing Range 0 NO 1 YES No Motion 0 NO 1 YES Out of Range 0 NO 1 YES Autozero 0 NO 1 YES 0 Gross 1 Net 0 Normal Weight 1 No Weight The slave response will contain a message in place of the weight if b0 of the status byte is high Reset Slave Resets the slave Master Transmission STX ADD 0 BCS2 BCS1 ETX Slave...

Page 55: ...rd commands Use of remote keyboard commands must be enabled This is done by the setting 2COM KBDCOMMANDS YES Master Transmission STX ADD K 0 xx BCS2 BCS1 ETX XX values 2 bytes 0 ZERO 19 SCALE 1 TARE 2 P TARE 5C CE 6 PRINT 1A PCS 17 WEIGH1 18 WEIGH2 5d ENTER 30 39 numeric keypad 0 9 1b MENU 0B X 08 W 09 S 05 T Slave Response None ...

Page 56: ...ndstill Bit 5 0 Normal Bit 6 Always 1 Bit 7 Zero or parity 1 No weight display 1 Net 1 Auto zero 1 Out of range 1 Standstill 1 Under minimum weighing range 2 Polarity or 3 8 Net weight 6 digits including decimal point if any 9 N Indicates that the preceding weight is net 10 15 Net weight 6 digits including decimal point if any 16 T or P T specifies that the preceding weight is a manual tare P spec...

Page 57: ...f the ticket printed after the first weighing of a vehicle DATE 16 05 03 15 46 N 00125 1st WEIGHT 15000 kg VEHICLE AB1234 MF 054 CLIENT SMITH PRODUCT SAND BB 02 Second Weighing In a weighbridge operation see VT300 User s Guide chapter 5 this is the format of the ticket printed after the second weighing of a vehicle DATE 16 05 03 16 00 N 00126 1st WEIGHT 15000 kg 16 05 03 15 46 2nd WEIGHT 32000 kg ...

Page 58: ... current print formats for all four tickets are erased and replaced with the default formats shown in the table in section 6 4 6 5 1 Creating a Custom Ticket Format A custom print format is created on a PC as an ASCII file that may be no larger than 1023 bytes The ASCII file can have two types of text Fields text with the format xx where xx is the field code When a ticket is printed each field add...

Page 59: ...rial number 017 net weight 021 MF or MT or M 022 net weight 1W 2W 023 serial number of first weighing ticket 024 date of first weighing 025 time of first weighing 026 weight measured in first weighing 027 serial number of second weighing ticket 028 date of second weighing 029 time of second weighing hours and minutes 030 time of second weighing hours minutes and seconds 031 weight measured in seco...

Page 60: ...n the indicator 2 Use a serial communication program such as Windows Hyper Terminal or Procomm to set the serial port baud rate data bits etc The indicator s ports communicate at 2400 baud unless otherwise specified 3 Press MENU and navigate to SYSTEM SET FORM DOWNLOAD 4 The display shows TICKET Nr 00 Enter the ticket number 01 for first weighing ticket 02 for second weighing ticket 03 for regular...

Page 61: ...ends press ESC on the indicator 10 The display shows END OF FORM briefly and the received ASCII block is transmitted to the PC for verification The received ticket is stored in non volatile memory 11 On the PC check the ASCII block sent by the indicator to ensure communication was successful If not go back to step 3 ...

Page 62: ...2 The digital input is used as a tilt switch When a signal is received on the input cable the display locks for a certain period of time The tilt switch is enabled and its time delay defined in SYSTEM SET TILT see section 7 5 7 1 Specifications 7 1 1 Digital Outputs Transistor output open collector positive common 24VDC 10 100mA per output Max off State voltage 30VDC leakage 100µA Optoisolated to ...

Page 63: ...e activated either by net weight value or by gross weight depending on how this was defined in setup Setpoints can be either normally open or normally closed depending on how this was defined in setup To edit weight thresholds for a setpoint 1 Press MENU and navigate to WEIGH SETP 2 The display shows SETP1 Press ENTER to select setpoint 1 or press T and ENTER the display shows SETP2 to select setp...

Page 64: ...ble below 4 The display shows SETP 2 3 ON OFF Set this parameter to ON or OFF refer to the table below 5 The display shows SETP 2 4 ON OFF Set this parameter to ON or OFF refer to the table below 6 The display shows SETUP GROSS NO YES Set this parameter to NO to specify that setpoints should be activated by net weight YES to specify that setpoints should be activated by gross weight Setpoint On Of...

Page 65: ...ting the board and setting the jumper you can set analog output parameters using the SYSTEM D A CAL menu see section 7 4 2 7 4 1 Connecting PCB and Setting Jumper In order to use analog output the option PCB PCB 761 connected it to the VT200 as follows In the one side to ST5 socket on the main board and in the other side using the mounting posts spacers provided to Stainless steel enclosure The ma...

Page 66: ... to enter mA values for zero and span There are several other analog output parameters detailed in the table below Parameter Description Values CALIBRATION Standard custom zero and span STD specifies that the scale should output 0mA at zero input and 20mA at maximum input or 0V at zero and 10V at max USER allows user defined zero and span values These can be defined using the parameters ZERO D A a...

Page 67: ... calibrate D A converter 0 10V 1 Place jumper JP1 on PCB 761 for voltage output 2 Power up the unit press MENU and navigate to SYSTEM D A CAL 3 Set parameters as follows CALIBRATION USER SCALE ERROR 0mA OUTPUT VOLT MODE NET CURRENT 0 20 RESOLUT INT OPERATION YES 4 Skip D A calibration and save the above settings by accessing SYSTEM 1CAL WRITE 5 Press MENU and navigate to SYSTEM TEST D A TEST 6 The...

Page 68: ...ime delay elapses Set SYSTEM SET TILT to 00 to disable the tilt switch function 7 5 1 Tilt Switch Options Parameter SYSTEM SET TILT which controls the tilt switch allows several special options To access these options set the parameter above 90 91 Tare scale on the rising edge of input Setpoints always enabled 92 Print on the rising edge of the input Setpoints always enabled 93 Setpoints active wh...

Page 69: ...tivate one of the PINs you can follow the same procedure and set that PIN to 000000 To set or change a PIN number 1 Press MENU and navigate to one of the following SYSTEM PIN SYSTEM to edit the system PIN which safeguards the SYSTEM menu and calibration parameters SYSTEM PIN OPER to edit the operator PIN which safeguards sensitive user operations You cannot set an operator PIN unless you have alre...

Page 70: ... to confirm it 3 The display shows TIME If the time is incorrect type the current time in HHMMSS format hours minutes seconds and press ENTER If the time is correct press ENTER to confirm it 4 The display shows the current alibi memory serial number used on printed tickets and to retrieve records from memory Edit this number if needed and press ENTER 8 1 3 Resetting Parameters INIT At any time you...

Page 71: ...C 1 2OIML In order to check that calibration has not been tampered with This can be verified by means of the audit trail counter which increments each time calibration parameters are changed and by means of a jumper for more information see section 4 5 Use the procedure below to see the current value of the counter and the current position of the jumper To check calibration seal and audit trail co...

Page 72: ...NU and navigate to SYSTEM SET LOCK KEY 2 Set the corresponding parameter to UNLOC see the bulleted list above 8 2 Testing the Indicator 8 2 1 Testing ROM RAM Integrity TEST MEM From time to time it is advised to check the integrity of the unit s ROM and RAM using the procedure below Note that partly corrupted memory does not necessarily affect indicator s operations and can be corrected To test RO...

Page 73: ...anks When you press a key the scan code for that key is shown on the display The scan codes are as follows 0 ZERO 13 SCALE 1 TARE 2 P TARE 6 PRINT 22 ESC 1A PCS 11 WEIGH1 12 WEIGH2 5d ENTER 5C CE 30 39 numeric keypad 0 9 1b MENU 0B X 08 W 09 S 05 T 8 2 3 Testing Digital Input and Outputs TEST I O To test digital input and outputs 1 Press MENU and navigate to SYSTEM TEST I O 2 The display shows INP...

Page 74: ...t connects to another device check if the signal was received 5 Connect a device to the digital input and send a signal See if the data appears next to INP 8 2 4 Testing Data Received on Both Serial Ports TEST PORT To test data received on one or both serial ports 1 Press MENU and navigate to SYSTEM TEST PORT 2 The display shows Rx1 and Rx2 where Rx1 is data received on port 1 in ASCII Hex Rx2 is ...

Page 75: ...ields which are shown to the user For example you can change the label CLIENT which by default is used for the second data field to COMPANY Changing the label effects what users enter in the data field and subsequently the data saved about vehicles that enter the weighbridge Before you can customize the weighbridge descriptions you must set SYSTEM SET OPER USER FORMS to YES After customizing weigh...

Page 76: ...iptions 1 and 2 3 Repeat step 2 until you reach the last description code 4 If you set the number of descriptions to less than 4 using the previous procedure some descriptions may not be shown For example if you set the number of descriptions to 2 descriptions 3 and 4 are never shown to users 9 2 Batch Weighing If you need to weigh several trucks for the same customer you can print a batch weighin...

Page 77: ...ing SYSTEM SET 1COM OPERATION TICK3 must be set 1 Press MENU and navigate to WEIGH BATCH 2 Enter the required weighbridge descriptions see section 9 1 above to learn how to customize these 3 Perform a regular weighing 4 Press PRINT A single line is added to the ticket 5 Repeat steps 3 and 4 for each additional weighing 6 When you are done press ESC ...

Page 78: ...isplayed 10 1 1Hardware and General Errors Error code desc Possible cause Actions to be taken E01 ROM Faulty ROM chip Contact Vishay Transducers E02 RAM Faulty flash RAM Contact Vishay Transducers E04 EEPROM Faulty EEPROM EEPROM memory stores calibration data Contact Vishay Transducers E05 SC A D s1 Scale 1 extremely out of range Check scale cable connectors LC excitation A D converter Contact ser...

Page 79: ...1 3Weighing and Counting Errors Error code desc Possible cause Actions to be taken E40 OUT OF MEM W Weighing memory is full Delete unused records or check errors in vehicle file see User s Guide section 9 4 E41 INVALID I D No data entered during first weighing Enter first weighing data E42 V CLE IN W F A first weighing has already been made for this vehicle Retry entry carry out second weighing or...

Page 80: ...ed total Clear accumulated total TFILE menu E69 TM OVERFLOW Accumulated total has overflowed because it has not been cleared for a long time Clear accumulated total TFILE menu E77 WM CHECKSUM Corrupted weighing memory Use menu path VFILE DELETE to clear weighing memory 10 2 Checking Load Cell Connection If there appears to be a problem with the load cell connection Check input and output resistanc...

Page 81: ... 1 Input Tilt Isolated ST4 ST3 ST1 ST6 ST5 5V Power Supply Power Input Filter Power On Off LCD Backlight PCB 801 PCB 761 PCB 765 PCB 713 PCB 439 PCB 750 Sel Current or Voltage Output JP1 5V OR ST1 ST1 5V ST9 J4 ST7 J2 ST9 J4 ST9 J4 Option Analog to Digital Conv Analog to Digital Conv 0 10VDC or 0 20mADC Analog Output Max 10 X 350Ω Load Cells Option 5V 32KB EEPROM R T C ST1 ST1 RS485 Driver JP1 TER...

Page 82: ...B 8 9 Termination resistor 120R D Type Metal Case Shield LOAD CELL1 Pin Description 1 Excitation 2 Sense 3 Sense 4 Excitation 5 Signal 6 Signal D Type Metal Case Shield 7 8 Calibration Enable COM 2 COM 1 Load Cell 2 or Analog Output Load Cell 1 DB9 fem DB9 male DB15 fem male DB15 fem LOAD CELL2 DB15 F Pin Description 1 Excitation 2 Sense 3 Sense 4 Excitation 5 Signal 6 Signal D Type Metal Case Shi...

Page 83: ...R JP1 Cal Lock INPUT OUT1 OUT2 COM TX RX SGND SHIELD SIG SIG EX SEN SEN EX PCB 801 PCB 713 PCB 765 PCB 761 PCB 439 PCB 750 A B A B SGND JP1 TER SEL SHLD SIG SIG EX SEN SEN EX IOUT VOUT VOUT or IOUT POWER IN 24 VDC SHLD Select Current or Voltage Output OR NOTE PCBs are drawn as viewed in the housing 7 6 5 4 3 2 1 3 2 1 7 6 5 4 3 2 1 7 6 5 4 3 2 1 6 5 4 3 2 1 5 4 3 2 1 ...

Page 84: ... Setpoints Connector 3 4 7 5 6 I1 CI CO O2 O1 Input 1 Tilt Switch Output 1 Output 2 Fuse Digital Outputs Imax 100m L O A D L O A D Power Supply 9 24VDC Power Supply 24VDC DIGITAL OUTPUTS TILT CONNECTIONS To VTx00 RS232 Connector To VTx00 RS232 Connector Printer DB25 Male PRINTER PC CABLES DB9 Metal Case 3 5 2 3 5 2 DB9 fem DB9 Metal Case DB9 fem Shield TX GRN GND BRN DTR WHI Shield TX GRN GND BRN ...

Page 85: ...Appendix A Technical Drawings v Printed Circuit Boards VT300 Technical Manual Rev A4 85 Doc TM VT300 EN v Printed Circuit Boards ...

Page 86: ... E MAIL vt de vishaymg com Vishay Tranducers UK Stroudley Road Basingstoke Hampshire RG24 8FW United Kingdom PH 44 125 646 2131 FAX 44 125 647 1441 E MAIL vt uk vishaymg com Vishay Transducers France 16 Rue Francis Vovelle 28000 Chartres France PH 33 2 37 33 31 20 FAX 33 2 37 33 31 29 E MAIL vt fr vishaymg com Vishay Transducers Iberica C Toronga 25 1 C 28043 Madrid Spain PH 34 91 721 8890 FAX 34 ...

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