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Service Operations and Testing 

Service Operations 

 

 

VT200/220 Technical Manual, Rev 1.00.01 

71

 Doc 

# 

TM-VT200/220-EN

 

8  Service Operations and Testing 

8.1 Service 

Operations 

The operations described below are performed by accessing the function menu 
(pressing the 

TARE 

( ) button for three seconds). For more detailed information on 

using the function Menu, see section 

 

3.3.1. 

8.1.1 

Setting and Changing Calibration Password (Function 40) 

The Personal Identification Number (PIN) is a password that restricts access to the 
calibration procedure. By default, the PIN is inactive and set to 

000000

. You can use 

the procedure below to set a secret PIN, which will prevent users and unauthorized 
personnel from changing calibration parameters. 

  To change the PIN:  

1.  Access the function menu and select function 40. 

2. The display shows 

Pin 0

 briefly, and then 

000000

. Enter the old PIN and press 

PRINT

( ).  

 

 

If the PIN you entered is correct, the display shows 

PIN 1

. 

 

 

If you entered a wrong PIN, the unit resets. Turn it on and go back to step 1.  

3.  Enter the new PIN number and press 

PRINT

( ). The display shows 

PIN 2

.  

4.  Re-enter the new PIN and press 

ENTER

. 

The new PIN is stored and the display shows 

PASS

 briefly. If the two entries are not 

the same, 

FAIL

 is displayed briefly and the new PIN you entered is discarded. 

  

IMPORTANT: Make sure you do not forget the PIN entered. If the PIN is 

lost, the unit must be returned to the factory to initialize the PIN, and a 
fee will be charged.

 

8.1.2 

Setting Date, Time and Serial Number (Function 05) 

In order to set the time, the battery backed RAM and real time clock option must be 
installed. 

This function depends on two parameters accessed through 

SETUP

 > 

SETUP1

: 

 

 

Parameter 1.6 – enables and disables battery-backed RAM. 

 

 

Parameter 1.4 – specifies the date format (DDMMYY or MMDDYY).  

Summary of Contents for VT 200

Page 1: ...VT200 220 Weight Indicator Technical Manual AND Protocol Revision 1 00 01 November 2008 Doc TM VT200 220 EN ...

Page 2: ...OUTPUT OPTIONAL 15 1 4 DIGITAL INPUT 16 1 5 DIGITAL OUTPUTS 16 2 INSTALLATION 17 2 1 SITE REQUIREMENTS 17 2 2 MOUNTING THE INDICATOR 17 2 2 1 Desktop Model Aluminum Enclosure 17 2 2 2 Wall Mount Model Stainless Steel Enclosure 18 2 3 CONNECTING LOAD CELLS 19 2 3 1 Desktop Model Aluminum Enclosure 19 2 3 2 Wall Mount Model Stainless Steel 20 2 3 3 Load Cell Operating Parameters 20 2 4 SERIAL CONNEC...

Page 3: ... 4 2 Menu Structure 32 3 4 3 Parameter Summary 32 SETUP SETUP 1 General Operating Parameters 32 SETUP SETUP 2 Com 1 Settings 33 SETUP SETUP 3 Com 2 Settings 34 SETUP SETUP 4 Tilt Switch 35 SETUP SETUP 5 Setpoints 35 SETUP SETUP 6 Lock Keys 36 ACAL Analog Output 37 4 CALIBRATION 38 4 1 CALIBRATION WITH STANDARD WEIGHTS S CAL 38 4 1 1 Zero Dead Load Calibration 38 4 1 2 Span Calibration 39 4 2 ELECT...

Page 4: ...9 6 1 SERIAL PORTS CONFIGURATION 49 6 1 1 RS232 Serial Port 49 6 1 2 RS485 Serial Port 49 6 2 SETTING PORT OUTPUT PARAMETERS 50 6 2 1 Setting Port 1 Output 50 6 2 2 Setting Port 2 Output 50 6 3 OUTPUT TYPES 50 6 3 1 Local Printer 50 6 3 2 Continuous Weight Output 50 Continuous Weight Data Block Composition LEO Format 51 Continuous Weight Data Block Composition AND Format 51 Two Scale Operation 52 ...

Page 5: ...AND DIGITAL INPUT 64 7 1 SPECIFICATIONS 64 7 1 1 Digital Outputs 64 7 1 2 Analog Outputs 64 7 1 3 Digital Input Tilt Switch 64 7 2 CONNECTING DIGITAL OUTPUTS AND TILT SWITCH 65 7 3 SETTING THRESHOLDS FOR DIGITAL SETPOINTS 65 7 4 CONFIGURING ANALOG OUTPUT 66 7 4 1 Connecting PCB and Setting Jumper 67 7 4 2 Setting Analog Output Parameters 68 7 4 3 Calibrating D A Converter 69 7 5 USING THE TILT SWI...

Page 6: ...G LOAD CELL CONNECTION 78 9 3 CHECKING POWER SUPPLY 78 9 4 CHECKING DIGITAL OUTPUTS 78 APPENDIX A TECHNICAL DRAWINGS 79 CONTACTING VISHAY TRANSDUCERS 84 Table of Figures FIGURE 1 DESKTOP MODEL FRONT AND REAR VIEW 17 FIGURE 2 WALL MOUNT MODEL FRONT AND REAR VIEW 18 FIGURE 3 LOAD CELL CONNECTION DIAGRAM FOR WALL MOUNT MODEL 19 FIGURE 4 LOAD CELL CONNECTION DIAGRAM FOR STAINLESS STEEL MODEL 20 FIGURE...

Page 7: ...erest to such trademark is granted 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 ...

Page 8: ...ing from 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 s...

Page 9: ...nected Line voltages may be present even when the product is powered off or a fuse is blown Before working on equipment connected to power lines 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 ...

Page 10: ... case 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 p...

Page 11: ...ate and to 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 30 200...

Page 12: ...6 3 Display Keys and Menus Using the VT200 220 display keypad function menu and setup menus Pg 20 4 Calibration Performing standard weight calibration and electronic calibration Pg 28 5 Setting Operating Parameters General parameters in the SETUP 1 and PAR menus Pg 33 6 Setting up Serial Communication Setting up communication with printers host PCs and other external devices Pg 38 7 Outputs and Di...

Page 13: ...es of classes 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 perso...

Page 14: ...eight display VT220 Black LCD 16mm height display Annunciators Net No Motion Minus sign Zero Range 1 and 2 Keyboard 8 key membrane type with tactile feedback Approvals EU type approval 10 000 divisions DK 0199 62 Accuracy class III Resolution Selectable up to 99 000 dd in accordance with regulations Max tare effect Full scale 100 Auto Zero track Off or 0 5 dd setup selectable Weight digits 4 5 or ...

Page 15: ...cal A D Converter Sigma delta 550 000 internal counts 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 second analog input See 1 2 above is needed an analog output may be added Analog Output is powered by an external 24VDC...

Page 16: ...put Input 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 dlay 2msec ...

Page 17: ...ace free of vibrations heat or humidity Avoid direct sunlight on the front of the instrument The unit 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 Front and rear views of the unit are shown in Figure 1 Figure 1 Desktop model front and rear view ...

Page 18: ...ainless Steel Enclosure Front and rear views of the unit are shown in Figure 2 Figure 2 Wall mount model front and rear view 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 according to the schematic diagram in Appendix A 3 Connect the cable shield between the plastic part...

Page 19: ... the diagram below Figure 3 Load cell connection diagram for wall mount model DB9 fem 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 male DB15 fem male DB15 fem LOAD CELL 2 DB15 F Pin Description 1 Excitation 2 Sense 3 Sense ...

Page 20: ...put of 10mV 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 cable...

Page 21: ...ternal 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 Printer DB25 Male DB9 Metal Case 3 5 2 3 5 2 DB9...

Page 22: ...rument Power should be isolated from other data processing equipment Verify that the AC power socket outlet is properly protected For optimum EMC performance keep the length of cable shielding inside the enclosure as short as possible Chassis Earth 470R 150R 470R A B RT V White Brown Shield Slave 1 VT x00 Slave 2 VT x00 Up to 30 slaves Slave 30 VT x00 A B A B A B RT 120R Termination Resistor 2X0 3...

Page 23: ...o turn the unit on and off perform the most common functions and access a function menu with more advanced options The lower area shows information about the maker model and certified limits of your indicator 3 1 The Display The VT200 has an LED display while VT220 model has an LCD display Both models have six digits used mainly to display weight information To the bottom and right of the digits s...

Page 24: ...he indicator is set to the two scales combined All operations relate to the sum of the two weights W1 The scale is currently in weight range 1 W2 The scale is currently in weight range 2 These are not relevant if you only have one scale connected to the indicator 3 1 2 Common Messages Shown on the Display Message Type Meaning 352 0 Weight of the item on the scale 24509 Number of units on the scale...

Page 25: ...o tare the scale Press again to view gross weight Taring using current weight Press to manually enter a tare value Use u P TARE to change the current digit then t TARE to move to the next digit When you are done press PRINT To cancel and view gross weight press ZERO Taring by entering weight When you press this key the current weight is printed to the printer and or output to an attached computer ...

Page 26: ...igits shown on the display 1 Take note of the flashing digit This is the digit you are currently editing Press u P TARE to increment this digit until it shows the number you need 2 Press t TARE to move to the next digit on the right It should start flashing 3 Press u P TARE to increment the flashing digit until it shows the number you need 4 Repeat steps 2 and 3 until you have edited the last digi...

Page 27: ...ght hand digit units This digit should start flashing 5 Press u P TARE to increment the right hand digit tens Keep pressing it until it matches the function you need For example if you need function 43 press u three times Assuming you entered 4 for the left hand digit the display should now show Fn 43 6 Press PRINT to confirm The operation associated with the function number you entered is perform...

Page 28: ...tem is limited to 1 display division When this function is enabled the display flashes and you may not print Press ZERO to cancel and return to normal resolution User s Guide section 4 6 20 Disable printer output Prevents the indicator from printing when you press PRINT even if a printer is connected 21 Set print format Ticket Shows date time and weight as follows 07 10 02 00 00 00 N 00001 GROSS 0...

Page 29: ... The format is as follows GROSS TARE NET 00 500kg 00 100kg 01 000kg Section 6 4 40 Changing PIN Used to change the current Personal Identification Number that enables access to the calibration procedure Chapter 8 41 Download custom print format 1 Downloads a custom print format from a PC Suitable for operations in gross mode Section 6 5 1 42 Download custom print format 2 Downloads a custom print ...

Page 30: ... number Choose the required Alibi number To view the gross weight of an Alibi record press PRINT When you are done press PRINT The display shows the memory record you requested If you want to print this and the next nine records press PRINT again Users Guide section 7 1 56 Print all alibi memory records Prints the entire contents of alibi memory including empty or corrupted locations Set setup par...

Page 31: ...racter received by COM 1 is echoed and displayed in ASCII hex on digits 1 and 2 Any character received by COM 2 is echoed and displayed in ASCII hex on digits 5 and 6 Chapter 8 3 4 Setup Menus 3 4 1 Accessing and Navigating Setup Menus To enter the setup and calibration menus either execute function 49 or follow the procedure below To enter the setup and calibration menus 1 Turn on the unit 2 Duri...

Page 32: ... setup INIT Resets scale parameters configuration and calibration data to manufacturer defaults A CAL A 1 A 2 A 3 A 4 A 5 A 6 A 7 A 8 D A analog output parameters 3 4 3 Parameter Summary SETUP SETUP 1 General Operating Parameters Par Description Values 1 1 Enable totalizer YES enables the totalizer NO disables it 0 NO 1 YES 1 4 Date format Sets the date format in all printing formats 0 d m y 1 m d...

Page 33: ...bel 13 alibi memory 20 custom print formats see section 6 5 22 continuous weight output w dual scale 2 c Master Slave protocol address 60 90 2 C Print on demand character 65 90 2 L Page length Ticket length in linefeeds 2 r Paper reverse Number of reverse linefeeds before printout 2 A Left margin Number of spaces from left margin 2 F Page header Number of linefeeds before printout 2 E Line termina...

Page 34: ...nly suitable to set 2 t 0 2 for Continuous Weight Output SETUP SETUP 3 Com 2 Settings Par Description Values 3 t Instrument communication type 00 disabled 01 continuous weight output 02 EDP protocol output 03 printer protocol output 06 continuous weight w tare output 11 continuous output with dual scale 65 89 master slave protocol address 3 1 Timeout control 0 NO 1 YES 3 2 Handshake 0 NO 1 YES 3 3...

Page 35: ...e input Setpoints always enabled 93 Setpoints active when input is high Setpoints inactive when input is low 94 Scale is tared at the rising edge of input If taring is successful setpoints are activated If input is low setpoints are inactive 95 When input is low scale 1 is selected and displayed When input is high scale 2 is selected and displayed 96 Scale is zeroed 00 disabled 01 90 x o 1 sec 91 ...

Page 36: ...0 220 EN SETUP SETUP 6 Lock Keys Par Description Values 6 1 SCALE key 1 lock 0 unlock 6 2 ZERO key 1 lock 0 unlock 6 3 TARE key 1 lock 0 unlock 6 4 PRESET key 1 lock 0 unlock 6 5 PRINT key 1 lock 0 unlock 6 6 TOTAL key 1 lock 0 unlock 6 7 PCS key 1 lock 0 unlock 6 8 Reserved for future use ...

Page 37: ... negative reading absolute mode For example if the display shows 100 00 and absolute mode is set AOUT 10mA In normal mode AOUT 0mA regardless of the negative reading 0 Normal 1 Absolute A 3 Error output level Specifies whether scale errors should be indicated as a low or high signal 0 Low 0 mA 1 High 24 mA A 4 Current voltage This parameter must correspond to the hardware jumper which defines whet...

Page 38: ...ive scale To calibrate scale 2 for instance switch to scale 2 by pressing SCALE and then access the CAL menu and perform calibration 4 1 Calibration with Standard Weights S CAL Calibration with standard weights is done in two stages Zero calibration in which you take a weight measurement when there is nothing on the scale see section 4 1 1 This is also called dead load adjustment Span calibration ...

Page 39: ...irm the calibration weight 6 The display shows Add Ld Place the calibration weight on the scale and wait about 10 seconds 7 Press PRINT The display counts down for about 10 seconds and then shows the calibration weight 8 If the weight shown is not accurate press ZERO and go back to step 4 4 2 Electronic Calibration E CAL Electronic calibration involves setting two values using the indicator keypad...

Page 40: ...x50 0 5880mV This is the span calibration value 3 Calculate an average of the load cells zero balance In the example above this equals 0 0257 0 0276 0 0553 0 0022 4 0 0266mV 4 Calculate the scale dead load In the example above this equals 1 9600 mV 1 940Kg 4 50Kg 0 0190mV 5 Calculate the overall dead load by adding together the load cell zero balance and the scale dead load calculated in step 4 In...

Page 41: ...nter the setup menus and use TOTAL to scroll to the STORE option 2 Press PRINT The indicator exits the setup menus and re initializes 4 4 Locking and Unlocking Calibration An internal jumper JP1 located on the main printed circuit board next to the analog circuit must be removed to allow access to configuration and calibration parameters One way to seal the indicator is to prevent access to this j...

Page 42: ...movable label to prevent unauthorized opening of the indicator enclosure Figure 7 A lead wire seal or hard plastic sticker to prevent unauthorized tampering with the load cell connector Figure 8 Figure 7 Non removable sticker Figure 8 Lead wire seal hard plastic sticker To seal the indicator wall mount stainless steel model Refer to Figure 9 below Figure 9 Wall mount model sealing instructions Lea...

Page 43: ...al the indicator desktop aluminum model For the desktop aluminum model refer to Figure 10 below for the non removable sticker and to Figure 11 for the lead seal non removable sticker You must apply both stickers Figure 10 Desktop model sealing with non removable sticker Non removable sticker Non removable sticker ...

Page 44: ...or identification label The load receptor bears the serial number of the indicator on its data plate 4 4 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 trail counter Execute function 48 If JP1 is currently in the sealed position the word SEALED appear...

Page 45: ...up menus allow you to calibrate the scale CAL menu see chapter 4 set communication parameters SETUP 2 and SETUP 3 see chapter 6 and input output parameters SETUP 4 SETUP 5 and ACAL see chapter 7 5 1 PAR Menu 5 1 1 Accessing the Menu and Editing Parameters To access the PAR menu 1 Turn on the unit 2 During the self test routine while all display segments are on all 8 on the display press PRINT mome...

Page 46: ...rs should remain on the display until the operator presses PRINT 0 NO 1 YES 8 5 Flash low battery indicator 0 NO 1 YES 8 6 Leading zero blank 0 NO 1 YES 8 7 Load cell amplifier gain adjustment A D Gain 2mV V setting allows maximum utilization of 1 75mV V 4mV V setting allows maximum utilization of 3 75mV V 0 2mV V 1 75mV V utilization 1 4mV V 3 75mV V utilization 8 8 AC DC excitation AC sets load ...

Page 47: ...rameters 2 P and 3 P are the same as those for Scale1 see 5 1 7 After checking that the annunciator is lit switching with the SCALE key calibrate the second scale 8 The device is now ready to work in dual scale mode 7 Use the SCALE key for switching between Scale1 Scale2 or sum of Scale1 Scale2 and annunciators lit Second scale is not supporting Continuous weight output AND protocol see 6 3 2 5 2 ...

Page 48: ... the VT200 220 and so are not detailed in the table below Par Description Values 1 1 Enable totalizer YES enables the totalizer NO disables it 0 NO 1 YES 1 4 Date format Sets the date format in all printing formats 0 d m y 1 m d y 1 6 Enable battery backed RAM If the battery backed RAM option is installed this parameter enables saving date time and the accumulated total in persistent memory You mu...

Page 49: ...ts no parity or 7 data bits odd or even 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 ho...

Page 50: ...sabled 01 continuous weight output See chapter 6 3 2 02 EDP protocol output See chapter 6 3 5 03 printing data from local printer on remote printer See chapter 6 3 6 65 through 89 participate in a network of several indicators as slave with this address 6 3 Output Types 6 3 1 Local Printer Works with port 1 A slip is printed on the printer connected to the port each time the user presses PRINT The...

Page 51: ... Sync Carriage return 0D hex for end of transmission Continuous Weight Data Block Composition AND Format Byte Name Description 1 2 Weight status1 ST Weight is stable US Weight is unstable OL Weight is overloaded 3 Always Comma 2C hex 4 5 Weight status2 GS Weight is gross NT Weight is net TR If regular tare is in system when pressing P TARE key TR will be displayed briefly PT If preset tare is in s...

Page 52: ... 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 Indicated weight 6 digits including decimal point if any 9 Sync Carriage return 0D hex for end of transmission 6 3 3 Continuous Weight With Tare Works with port 2 RS232 or RS485 Th...

Page 53: ...y 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 the preceding weight is gross 24 Sync Carriage return 0D hex for end of transmission When Display Indication is Not Weight When the indicator displays something other than weight the data string to C...

Page 54: ...mal 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 Must be always set to 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 Carriage return 0D hex for end of transmission Command ZERO Equivalent to pressing ...

Page 55: ...doesn t send an ENQ the indicator shows Error 30 host not ready 2 After the PRINT 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 either Acknowledges receiving the data properly by sending an ACK 06 h command Notifies the indicator the data w...

Page 56: ... number between 65 and 89 you specify that the indicator should participate in a network of several indicators The number set in 3 t is this indicator s network address Master Slave Commands Port 2 RS232 RS485 List of File Types Commands Command Hex Description Time Slave Response 3F UPLOAD WEIGHT STATUS 50 ms STATUS WEIGHT 40 RESET SLAVE 15ms NONE K 4B DOWNLOAD KEY 0 1 ms NONE Upload Status It is...

Page 57: ...GHT X Y Z BCS2 BCS1 ETX WEIGHT 5 digits decimal point if any ASCII MSD FIRST X Scale number 0 Scale 1 Scale 2 1 Scale 1 2 Scale 2 Y Digital input TILT 0 Not Active 1 Active Z Setpoints 0 Neither is active 1 Setpoint 1 is active 2 Setpoint 2 is active 3 Setpoint 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 ...

Page 58: ...s Use of remote keyboard commands must be enabled This is done by the setting SETUP3 3 5 ON Master Transmission STX ADD K 0 xx BCS2 BCS1 ETX XX values 2 bytes 30 Keyscale1 2 31 Keyesc 32 Keyright 33 Keyup 34 Keyenter 35 Keydown 36 Keyfn 37 Keypieces 38 Keybattery 39 Keyfnpieces Slave Response None Gross Tare Net Weight Transmission The output data format of the master slave protocol is shown below...

Page 59: ...ght 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 the preceding weight is gross 24 Scale number Either 1 or 2 Tare Presetting via PC The command for taring the device is T0 and it has the following format STX ADD T 0 XXXXXX BCS2 BCS1 ETX XXXXXX the tare weight is the 6 digit required tare For e...

Page 60: ...et Date time weight Whether a gross or net weight is shown depends on the current VT200 220 mode 29 04 03 09 15 N 0010 WEIGHT 123 40 kg 22 Continuous output Sends the current weight measurement and status to an external device a display or PC Layout depends on the settings of the external device There are 2 Continuous output formats LEA and AND see 6 3 2 23 Net gross Either net or gross weight dep...

Page 61: ...45 02 345 10 000 6 5 Custom Print Formats In addition to the standard print formats there are two custom print formats activated by function 41 for gross mode and function 42 for net mode 6 5 1 Creating a Custom Print Format A custom print format is created on a PC as an ASCII file that may be no larger than 511 bytes The ASCII file can have two types of text Fields text with the format xx where x...

Page 62: ...ansducers WEIGHT 12345 kg N 0001 6 5 2 Downloading a Custom Print Format Before you can download a custom print format you must create it on a PC as an ASCII file 511 bytes or less in length see the previous section The VT200 220 can store up to two custom print formats in two memory slots Function 41 is used to download a print format to the first slot function 42 is used to download a print form...

Page 63: ...1 if you selected function 41 or For 2 if you selected function 42 An ASCII file for the default print format is uploaded to the PC 7 On the PC you can open the ASCII file and edit it to create the custom print format If you have already prepared an ASCII file for the custom print format discard the uploaded file 8 Use the serial communication program on the PC to transmit it to the indicator 9 Wh...

Page 64: ...nput 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 during setup 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 2 5kV Short circuit protected 2ms max...

Page 65: ...asured reaches exactly 13kg or more the setpoint will be switched on if normally off or off if normally on You can use the two setpoints to set an upper and lower range for a production operation For example if the weight of a product drops below the threshold for setpoint 1 or goes above the threshold for setpoint 2 it can be rejected Setpoints can be activated either by net weight or by gross we...

Page 66: ...display now shows SEtP 2 briefly then the current threshold for setpoint 2 The extreme left digit flashes If you don t want to change this threshold press PRINT and skip to step 8 If you do want to change it proceed to step 7 7 Enter a new threshold value To do this press u P TARE to change the current digit then t TARE to move to the next digit When you are done press PRINT 8 The threshold values...

Page 67: ...and in the other side using the mounting posts spacers provided to Stainless steel enclosure Main board Aluminum enclosure Indicator s rear panel see page 80 Jumper JP1 determines the output mode current or voltage Analog output pins connections 1 Connect pins as follows For current output connect pin 1 current output and pin 3 common For voltage output connect pin 2 voltage output and pin 3 commo...

Page 68: ...other analog output parameters detailed in the table below Par Description Values A 1 Standard custom zero and span 0 specifies that the scale should output 0mA at zero input and 20mA at maximum input or 0V at zero and 10V at max 1 opens a dialog after A 8 that allows you to enter custom zero and span values Press PRINT to confirm the display shows 0 XX XXX Enter the D A output at zero in voltage ...

Page 69: ... and disables the analog output 0 Disabled 1 Enabled 7 4 3 Calibrating D A Converter To calibrate D A converter 0 10V 1 Place jumper JP1 on PCB 761 for voltage output 2 Power up the unit enter the setup menus and enter the ACAL menu 3 Set parameters as follows A 1 1 A 2 0 A 3 0 A 4 1 A 5 0 A 6 0 A 7 1 A 8 1 4 Skip D A calibration and save the above settings by selecting STORE 5 Access the function...

Page 70: ... after the same time delay elapses Set 4 t to 00 to disable the tilt switch function 7 5 1 Tilt Switch Options Parameter 4 t which controls the tilt switched allows several special options accessed by setting it 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 when input is high Setpoin...

Page 71: ...on 40 2 The display shows Pin 0 briefly and then 000000 Enter the old PIN and press PRINT If the PIN you entered is correct the display shows PIN 1 If you entered a wrong PIN the unit resets Turn it on and go back to step 1 3 Enter the new PIN number and press PRINT The display shows PIN 2 4 Re enter the new PIN and press ENTER The new PIN is stored and the display shows PASS briefly If the two en...

Page 72: ...and select function 02 The battery charge is displayed as a percentage of remaining capacity Press ESC to exit 8 1 4 Checking Calibration Seal Function 48 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 4 Us...

Page 73: ...and Unlocking Keys To lock keys 1 Access the setup menus and navigate to SETUP SETUP 6 2 Set one or more of the following parameters to 1 6 1 SCALE 6 2 ZERO 6 3 TARE 6 4 P TARE 6 5 PRINT 6 6 TOTAL 6 7 PCS Keys you lock will not work i e if a user presses them nothing will happen until you unlock them To unlock keys 1 Access the setup menus and navigate to SETUP SETUP 6 2 Set the corresponding para...

Page 74: ...ypad is working properly Access the function menu and select function 91 The display blanks When you press a key the scan code for that key is shown on the display The scan codes are as follows 30 SCALE 32 TARE 33 P TARE 34 PRINT 35 TOTAL 37 PCS 8 2 3 Testing Digital Input and Outputs Function 93 To test digital input and outputs setpoints 1 Access the function menu and select function 93 2 The di...

Page 75: ...buffer Access the function menu and select function 94 An ASCII file 30h 7Fh is output to the printer port with error control 8 2 5 Testing Data Received on Both Serial Ports Function 96 To test data received on one or both serial ports 1 Access the function menu and select function 96 2 The display shows data received on COM ports as follows The two digits on the left first and second digits show...

Page 76: ...t manufacturer Err 04 Calibration data corrupted due to faulty EEPROM Contact manufacturer Err 05 The scale is not connected properly or the analog to digital converter is faulty Check the scale cable and connectors If these are okay contact manufacturer Err 06 Insufficient power Check the indicator s power supply Err 15 The indicator has been powered on after an irregular shutdown A power failure...

Page 77: ...nting has too few items Remove the units from the scale and press ZERO Try to weigh a heavier group of units Err 51 Sample used in counting weighs too little Remove the item s from the scale and press ZERO Try to weigh a heavier item Err 55 Alibi memory full The memory serial number resets to 0000 From now on each new memory entry overwrites the oldest record in alibi memory Press ZERO Err 56 Prin...

Page 78: ...k input and output resistance Check resistance between any terminal and shield Check load cell connection and cable 9 3 Checking Power Supply If the unit does not turn on Check 9 15VDC power supply Check the resettable fuse F4 on PCB 801 9 4 Checking Digital Outputs If the setpoints are not working properly Test the setpoints see chapter 8 2 3 Check 24VDC power supply Check the resettable fuse F3 ...

Page 79: ...s 1 Input Tilt Isolated ST4 ST3 ST1 ST5 5V Power Supply Power Input Filter Power On Off PCB 801 PCB 761 PCB 765 PCB 715 VT200 OR PCB 716 VT220 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 J...

Page 80: ...ion 6 A 7 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 Meta...

Page 81: ...ock POWER INPUT OUT1 OUT2 COM TX RX SGND SHIELD SIG SIG EX SEN SEN EX PCB 801 PCB 715 VT200 OR PCB 716 VT220 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 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 3 2 1 ...

Page 82: ... Power 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 GN...

Page 83: ... Technical Drawings v Printed Circuit Boards VT200 220 Technical Manual Rev 1 00 01 83 Doc TM VT200 220 EN v Printed Circuit Boards PCB 761 ANALOG OUTPUT PCB 439 RS485 PCB 765 2nd ANALOG INPUT PCB 801 MAIN BOARD ...

Page 84: ... Transducers China No 5 Binguan Nan Dao Youyi Rd Hexi District Tianjin China Code 300061 PH 86 22 2835 3503 FAX 86 22 2835 7261 E MAIL vt prc vishaymg com Europe Vishay Transducers Germany Tatschenweg 1 74078 Heilbronn Germany PH 49 7131 39099 0 FAX 49 7131 39019 229 E MAIL vt de vishaymg com Vishay Transducers UK Stroudley Road Basingstoke Hampshire RG24 8FW United Kingdom PH 44 125 646 2131 FAX ...

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