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Technical Specifications B–1

TECHNICAL SPECIFICATIONS

B

B.1

Scanner Performance

The SCANTEAM 3700PDF performance has been measured in terms of the first bar
elongation/contraction and inner bar (space) elongation/contraction when scanning
Welch Allyn test targets. If you need more information on these measurements, contact
your Welch Allyn representative.

B.2

Optical Specifications

Scanning Direction:

Single Line (Unidirectional)

Scan Rate:

120 scans per second
See chart below

.

Scan Speeds
Scans/Second

Approximate Lateral Scan Speed

mm/Sec

Inch/Sec

120

5

127

Lateral Motion Sensitivity:

5 inches per second (254mm/sec)

Scan Width:

2.4 inches [61mm] at contact
3.5 inches [89mm] maximum

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Содержание Scanteam 3700PDF

Страница 1: ...PDF417 Capable CCD Reader ...

Страница 2: ... 1998 Welch Allyn Inc All rights reserved ...

Страница 3: ... not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures FCC Class B Compliance Statement Caution Any changes or modifications made to this device that are not expressly appro...

Страница 4: ... CE mark on the product indicates that the system has been tested to and conforms with the provisions noted within the 89 336 EEC Electromagnetic Compatibility Directive and the 73 23 EEC Low Voltage Directive Welch Allyn shall not be liable for use of our product with equipment i e power supplies personal computers etc that is not CE marked and does not comply with the Low Voltage Directive ...

Страница 5: ......

Страница 6: ...haracteristics of the 3700PDF 2 2 2 2 1 Mechanical Layout of the 3700PDF 2 2 2 2 2 Single Modular Input Output Power Port 2 3 2 2 3 Audible Indicator 2 3 2 2 4 Mounting Inserts 2 3 2 3 Operating Theory 2 3 2 4 Scanner Host Communication 2 4 2 4 1 Communications Port 2 4 2 4 2 Asynchronous ASCII Interface 2 4 2 5 Power Requirements 2 4 Chapter 3 Set Up and Installation Section Page 3 1 Introduction...

Страница 7: ...eper Attributes 4 6 4 6 3 RS 232 Serial Output Options 4 7 4 6 4 Trigger Options 4 8 4 6 5 Prefix Suffix Programming 4 9 4 6 6 Code Selection I Industrial Menu Page 4 14 4 6 7 Code Selection II Retail Menu Page 4 17 4 6 8 Code Selection III Stacked Menu Page 4 19 4 6 9 Disable All Symbologies 4 21 4 6 10 Serial Menu 4 21 Chapter 5 Service Technical Assistance Section Page 5 1 Maintenance 5 1 5 2 T...

Страница 8: ...ce Cable B 6 C Printing PDF417 Labels C 1 Printing PDF417 Labels for Improved Readability C 1 C 2 PDF417 Labels Parameters C 1 C 2 1 X Dimension Y Dimension C 1 C 2 2 Number of Columns and Rows C 1 C 2 3 Error Correction Level C 1 C 3 Improving Readability C 2 C 3 1 Tilt Angle C 2 C 3 2 Scan Speed C 2 C 3 3 Tolerance to Label Damage C 3 C 4 Suggestions for Maximum Readability C 3 C 4 1 Making X Di...

Страница 9: ...System Operation 2 1 2 2 3700PDF Fixed Mount CCD Dimensions 2 2 2 3 Basic Scanner Decoder Operation 2 3 3 1 SCANTEAM 3700PDF Identification Label 3 2 3 2 Mounting Dimensions for the 3700PDF 3 5 3 3 Examples of SCANTEAM 3700PDF Barcode Orientation 3 6 3 4 SCANTEAM 3700PDF Pitch Skew Tilt Tolerance 3 7 3 5 Specular Reflection Interference 3 7 3 6 Scanner Illumination Clearance 3 8 4 1 Programming Me...

Страница 10: ...e Mount CCD Chapter 4 describes the default operating and configuration parameters and explains how to change these to meet your specific needs using serial commands sent through the host RS 232 communications interface Explains how to use the configuration status query commands Chapter 5 explains how to obtain service and technical assistance Appendix A is a guide to CCD operation bar code basics...

Страница 11: ... Palmer 1989 Helmers Publishing Inc 174 Concord Street Peterborough NH 03458 603 924 9631 Handbook of Bar Coding Systems Harry E Burke 1984 NCR Corporation Van Nostrand Reinhold Company Inc 115 Fifth Avenue New York New York 10003 Automatic ID Resource Catalog AIM USA Publications 634 Alpha Drive Pittsburgh PA 15238 2802 Fax 412 963 8753 Phone 412 963 8588 AIM Guidelines on Symbology Identifiers U...

Страница 12: ...e CCD scanning technology Audible indicator configurable for good read or no read True RS 232 data communications with RTS CTS XON XOFF Autodiscrimination of 7 bar code symbologies 120 scans per second Flexible scan trigger configurations Decoder configurable for high security Scan voting to ensure bar code data integrity Ease of configuration through RS 232 interface and menu programmability 1 2 ...

Страница 13: ... port is an 8 pin modular female connector Pin assignments and function descriptions of these features are presented in Appendix B Cables are available from Welch Allyn for evaluation of the SCANTEAM 3700PDF Welch Allyn can provide custom cables for host integration A modular connector was chosen as the standard configuration for ease in servicing the scanner once installed 1 2 2 Nonvolatile Memor...

Страница 14: ...that in turn references the desired data file A PDF417 symbol can encode an entire data file thus eliminating the need for an additional data base PDF stands for Portable Data File 1 5 Programmable Option Summary Standard programmable features to customize the scanner for your application are entered by scanning bar code symbols from the SCANTEAM PDF417 Programming Menu Programmable features inclu...

Страница 15: ...1 4 SCANTEAM 3700PDF Description ...

Страница 16: ...between the components of the basic system Scanning Circuitry Scans Bar Code Auxiliary Trigger Device Optional SCANTEAM 3700PDF Machine Mount CCD Host System Power Supply Decoder Host Application Asynchronous Communication Supplies Power to 3700PDF typically Sends Configuration Commands Sends Software Trigger Signal Optional Enables Scanning Circuitry Reads Bar Code Sends Decoded Bar Code to Host ...

Страница 17: ...he SCANTEAM 3700PDF Machine Mount CCD including general dimensions the location of connectors and the scanner window 3 5 88 9 1 05 26 7 2 9 73 7 Top View Side View Interface Port I O Communications and Power Back View Front View Scanner Window millimeters in brackets mm Mounting Surface Mounting Surface Figure 2 2 3700PDF Fixed Mount CCD Dimensions ...

Страница 18: ...d imaging lens focuses the scattered optical energy from the bar code symbol and the peak detectors and comparator generates a digital representation of the bar code symbol to send to the microprocessor Refer to Appendix A CCD Operation and Bar Code Scanning for a detailed explanation of 3700PDF scanning circuitry operation When the 3700PDF sees a trigger a read cycle is started The read cycle is ...

Страница 19: ... the host system and the 3700PDF occur using an Asynchronous ASCII protocol Refer to Appendix B for a complete description of pin assignments of the RS 232 communications port Caution Do not use a host communications cable with more wires connected than are required for the application Damage to equipment within the system may result if the communications connection is improperly wired 2 4 2 Async...

Страница 20: ...l provide application support if needed Refer to Chapter 5 for Welch Allyn s service and technical assistance phone number s 3 2 General Preparation for Use Upon receipt open the carton Keep the shipping carton since this should be used in the event the scanner ever needs to be returned to the factory for service or repair Check the part numbers and confirm that each item on the packing list has b...

Страница 21: ...stem or computer power switch to the OFF position ITEM 3700PDF C 2331 Figure 3 1 SCANTEAM 3700PDF Identification Label 3 3 Set up Procedure for Evaluation of the SCANTEAM 3700PDF Caution The SCANTEAM 3700PDF contains static sensitive components The SCANTEAM 3700PDF has been designed for internal protection against damage due to discharge Precautions should be taken to protect against static discha...

Страница 22: ...tions to the scanner 1 Connect the RS 232 communications I O cable between the SCANTEAM 3700PDF and the PC serial port You may require a 25 pin to 9 pin converter and Null Modem adapter Contact your Welch Allyn sales representative or distributor for assistance 2 Connect power to the SCANTEAM 3700PDF The scanner should beep once 3 Start serial communications software program such as PCTools Deskto...

Страница 23: ...0PDF contains static sensitive components Precautions must be taken to eliminate potential static discharge to the SCANTEAM 3700PDF Installation in the host instrument includes the following activities 1 Power down the host system or instrument 2 Mount the SCANTEAM 3700PDF in the host instrument The SCANTEAM 3700PDF has four mounting holes threaded inserts Be sure to allow access to all cable conn...

Страница 24: ...e adjustment to align the optical center line on the intended target This adjustment should account for tolerance variation in the SCANTEAM 3700PDF scanner as well as the host equipment Front View 3 1 78 7 42 10 7 Scanner Window 2 5 1 1 05 26 7 2 9 73 7 Mounting Surface Focal Plane 2 73 69 3 1 95 49 5 REF 575 14 61 256 6 5 Mounting Surface Connector Location Rear View Figure 3 2 Mounting Dimension...

Страница 25: ...ars on the label as well a 0 25 inch quiet zone before and after the code for linear codes The Automatic Identification Manufacturers AIM the industry association has defined orientation of the bar code label according to Figure 3 4 Indicates relative direction of bar code target movement Front View Bar Code Target Moving Perpendicular to Scan Beam Optical Light Center Line Optical Light Center Li...

Страница 26: ...ROLL Rotation about the Y axis 7 Bar Code Label R Rotation THE ABOVE DEFINITIONS ARE FROM AIM SPECIFICATIONS Rear View R R R 0 to 10 specular reflection interference See Figure 3 5 Figure 3 4 SCANTEAM 3700PDF Pitch Skew and Tilt Tolerance Bar Code Target 30 30 10 0 SCANTEAM 3700PDF Specular Zone Mounting Surface ÇÇÇÇÇÇÇ 31 7 9 Nominal Optics Center Line Figure 3 5 Specular Reflection Interference ...

Страница 27: ... 5 2 2 3 5 88 9 2 4 61 1 27 millimeters in brackets cm Figure 3 6 Scanner Illumination Clearance This completes installation of the SCANTEAM 3700PDF Machine Mount CCD in a host instrument You are now ready to configure the SCANTEAM 3700PDF for your particular application Instructions for configuring the SCANTEAM 3700PDF using configuration and operational commands are provided in Chapter 4 Configu...

Страница 28: ...nu The menus contain the bar code symbols you scan to Enter the programming mode Select application options Exit the program mode As you scan the bar code symbols the information represented by the bar code symbols is stored in the reader s non volatile PEROM memory If the unit is turned off the non volatile PEROM memory retains the programmed application options Note To program the unit by scanni...

Страница 29: ...Main Sections Application Options RS 232 Output Trigger Mode Prefix Suffix Code Selection Baud Rate Character Format Data Flow Control No Read Notification Serial Menu Autotrigger Enable Manual Trigger Enable Prefix Characters Suffix Characters Industrial Symbologies Codabar Code 39 Interleaved 2 of 5 Code 128 Used to program the SCANTEAM 3000PDF Reader by sending serial commands from the host com...

Страница 30: ...EAM 3700 PDF unit provides distinct audio feedback for each of these phases as follows Data Collection Constant ticking as the operator moves the reader across the PDF417 code and acquires PDF417 codewords for decoding Decoding Once the reader has acquired enough data for decoding the unit stops all collection ticking stops and produces a steady tone a hum to indicate the reader is decoding the co...

Страница 31: ...med asterisked values by scanning DEFAULT symbol To enable or disable listed code selections UPC Version A Version D 2 Version E0 scan scan scan scan scan Yes No No Yes No RETAIL ID c HEX 63 Version E1 Check Digit Xmit Number System Xmit Version E Expand A B C D E F Yes No Yes No Yes No Yes No Notes 2 UPC Version D is not supported at this time EAN EAN JAN 13 EAN JAN 8 Check Digit Xmit Yes No Yes ...

Страница 32: ...ividual bar code symbols on the Bar Code Chart to program the scanner to the indicated values For example to disable UPC Version E1 scan I D and No from the Bar Code Chart 4 Scan the EXIT PROGRAM MODE symbol after all of the program selections have been made and the programming process is terminated Note The page opposite the selection variable chart in the SCANTEAM PDF417 Programming Menu is freq...

Страница 33: ... provides five different beeps single beep double beep triple beep tick and hum Single Beep One beep signals a successful barcode read Double Beep Two beeps in succession indicate either a hardware reset as when the unit is first powered on ENTER EXIT ESCAPE programming mode when using the programming menu pages Triple Beep Three quick beeps in succession indicate an error condition as when an ill...

Страница 34: ...n A parity bit may be added to each transmitted character as a means of character validation A checksum character may also added to the message as a suffix for even stronger security see Prefix Suffix menu page The receiving device must be set up for precisely the same character format and baud rate as the reader to ensure reliable communication 4 6 3 3 Data Flow Control Flow control may be necess...

Страница 35: ...activate the trigger without successfully reading a bar code you will receive the output sequence Prefix NR Suffix This occurs when the trigger switch is pressed or when the scanner is triggered serially 4 6 4 Trigger Options The following information describes the two trigger options Generally a TRIGGER ON causes the reader to begin scanning and a TRIGGER OFF halts scanning The meaning of TRIGGER...

Страница 36: ... triggered serially it is not necessary to send the TRIGGER OFF command following a good read 4 6 5 Prefix Suffix Programming The scanner will transmit the decoded message after every successful bar code read You have the option of adding characters before prefix and after suffix the bar code message Transmitted data frame Characters for the prefix and suffix are selected by their hexadecimal ASCI...

Страница 37: ...C D E F G H I J K L M N O 40 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 4F P Q R S T U V W X Y Z _ 50 51 52 53 54 55 56 57 58 59 5A 5B 5C 5D 5E 5F a b c d e f g h i j k l m n o 60 61 62 63 64 65 66 67 68 69 6A 6B 6C 6D 6E 6F p q r s t u v w x y z DEL 70 71 72 73 74 75 76 77 78 79 7A 7B 7C 7D 7E 7F Table 4 3 HEX ASCII Chart SYMBOLOGY CHART Symbology 66 67 68 69 6A Codabar Code 39 UPC EAN Interleaved...

Страница 38: ... zero The LRC checksum can have any value 00 through FF hexadecimal but not all characters in this range are printable This option causes the LRC checksum to be transmitted as three characters two hexadecimal numbers plus a space A single character is transmitted having a value 00 through FF hexadecimal For initializing the checksum to some value other than zero XX can be any value 00 through FF h...

Страница 39: ...r prefixes and suffixes are entered as HEX values Refer to the HEX ASCII chart on page 4 10 Example Application 1 The host application requires that the bar code data be framed by a leading STX character the prefix and a trailing ETX character the suffix As an added assurance that the data is transmitted correctly the whole string including the suffix es must be checked for validity on the host ap...

Страница 40: ... if the application required two or more suffix characters following the LRC To what value should the LRC character be initialized Example Application 2 Remaining Prefix Characters LRC CR ETX Bar Code Message Prefix Suffix Since the CR and ETX characters are transmitted after the LRC they are not normally included in the LRC calculation You can however compute the Exclusive OR of all characters th...

Страница 41: ...n Bar Code Chart I scan Roman Numeral II 6 On Bar Code Chart III scan 86 7 On Bar Code Chart III scan 0 D 0 3 8 Scan the Exit label Data will be transmitted to the host as STX data LRC CR ETX 4 6 6 Code Selection I Industrial Menu Page The SCANTEAM 3700PDF autodiscriminates between the following Industrial symbologies Codabar Code 39 Interleaved 2 of 5 and Code 128 The Code Selection I Industrial ...

Страница 42: ...e 39 Minimum Length 8 Maximum Length 14 Start Stop Transmit Check Digit Required Check Digit Transmit Full ASCII Yes Code 128 Minimum Length 6 Maximum Length 12 Refer to the Selections Variables options on the CODE Selection I Industrial page of the SCANTEAM PDF417 Programming Menu Note If Check Digit is required and the code does not contain a check digit the SCANTEAM 3700 will not read the code ...

Страница 43: ... Yes Set Minimum Length F To 8 0 8 Set Maximum Length G To 14 1 4 Set Code 128 IV To enabled Yes Set Minimum Length A To 6 0 6 Set Maximum Length B To 12 1 2 Leave Menu Page EXIT Note To maximize reading efficiency and security all unused codes should be disabled Code 39 may have the append function enabled or disabled with the SCANTEAM PDF417 Programming Menu whereas the Code 128 append function ...

Страница 44: ...essed or expanded 2 or 5 digit addendum check digit transmission number system digit transmission Enable Version 8 and 13 2 or 5 digitaddendum check digit transmission ISBN conversion Yes or No Max Length A symbology with an incorrect check character is ignored that is it is treated as a disabled symbology The check character for all applicable symbologies may be transmitted or not depending on th...

Страница 45: ... the Selections Variables table on the CODE Selection II Retail page of the SCANTEAM PDF417 Programming Menu The scanning sequence to program the scanner to read only this UPC Code format would be FUNCTION SELECTION VARIABLE Enter Menu Page ENTER Set DEFAULT Values DEFAULT Enable UPC A I A Yes Enable UPC Version E 0 C Yes Enable UPC Version E 1 D Yes Disable Check Digit Xmit E No Disable System Xm...

Страница 46: ...g up to 13 000 characters of data can be combined in designated order and transmitted as a single data packet in the PDF417 readers Disabling Macro PDF causes the data from every PDF417 symbol to be transmitted independently in the order scanned 4 6 8 2 Show Macro Control Block Enabling this feature causes Macro PDF Control Block contents to be included at the end of the encoded data except when a...

Страница 47: ...gh decoding cannot succeed and more scanning is required This feature is often used in conjunction with the Notify When Certain option In a machine mount system with a predetermined scan cycle it may be an advantage to use Trigger Off Decoding When this option is enabled the reader will not attempt to decode PDF417 until a TRIGGER OFF During the predetermined scanning time the reader is sure to be...

Страница 48: ...orresponding ASCII decimal value are given in the SERIAL MENU CHARTS included in the SCANTEAM PDF417 Programming Menu Example 1 If you want PDF417 enabled and all other bar code symbologies disabled use the following sequence of serial commands E Ctrl X T Ctrl Y SPC Ctrl Y F Ctrl X K Ctrl Y 0 Ctrl Y SPC Ctrl Y The above serial commands correspond to the selections and variables on the programming ...

Страница 49: ...ameter changes are immediately affected The connected host serial device must also change to the programmed selections accordingly After changing baud rate it may be necessary to wait a short amount of time for the serial port to stabilize For this reason bar code menuing is suggested for changing RS 232 parameters In manual trigger mode two serial commands may be used to turn the trigger on off T...

Страница 50: ...at prevent the SCANTEAM 3700PDF from operating normally Field repair procedures include the following Power supply troubleshooting SCANTEAM 3700PDF Machine Mount CCD troubleshooting 5 2 1 Troubleshooting Hints If there is no power to the SCANTEAM 3700PDF Machine Mount CCD check the following Host power supply output to the SCANTEAM 3700PDF Check that the output voltage from the host is 5 VDC If th...

Страница 51: ...r XON Baud rate parity stop bits or data bits is wrong Solution 1 Connect cable 2 Configure the 3700PDF for the proper trigger mode and read timeout value 3 Provide trigger consistent with the trigger mode configuration 1 Enable the symbology 2 Configure the 3700PDF for correct length 3 Configure the 3700PDF to not require checksum or use a label with a valid checksum 1 See 3700PDF is not reading ...

Страница 52: ...n number RMA Welch Allyn Inc Data Collection Division Product Service Department 4619 Jordan Road P O Box 187 Skaneateles Falls New York 13153 0187 Product Service Department Telephone 315 685 4278 or 685 4360 Fax 315 685 4156 For service in Europe please contact your Welch Allyn representative at address below or your local distributor Welch Allyn Ltd 28 Sandyford Office Park Foxrock Dublin 18 Ir...

Страница 53: ...NTEAM 3700PDF involves reversing the steps that you followed during installation Chapter 3 Caution Some circuits in the SCANTEAM 3700PDF Machine Mount CCD are sensitive to electrostatic discharge Be sure you are properly grounded before removing the SCANTEAM 3700PDF from the host system Note Set the host instrument power switch to the OFF position Step 1 Disconnect the data communications power ca...

Страница 54: ...ning and Decoding a Bar Code Symbol The body of the SCANTEAM 3700PDF houses all the scanning elements and decoding interface elements Refer to Figure A 1 Power Supply Digitizing Microprocessor Signal Processing and Control Circuitry Cable Bar Code Symbol Bar Code Label Image Modular Connector LED Pulse Generator CCD Sensor LED Reflector Lens Aperture Decoding Interface Pixel Array Figure A 1 Main ...

Страница 55: ...to the host 8 Depending upon the trigger chosen the scanner either continuously initiates another scan cycle or waits for the next trigger to scan LED Reflector The bar code symbol is illuminated with a bank of LEDs with a proprietary reflector The LEDs are pulsed strobing illumination to stop relative motion of the scanner and the label CCD Sensor The optical energy scattered from the bar code sy...

Страница 56: ... device configures the operating parameters sent through serial commands as required and decodes the scanned bar code data Timing Sequence Figure A 2 illustrates the timing sequence for the SCANTEAM 3700PDF Shift Out Analog Data Illumination Timing White Black Analog Signal from CCD Array Digital Data Out White Black Bar Code Symbol Being Scanned Decoded Data Decoded Output Only Figure A 2 SCANTEA...

Страница 57: ...anner All scanners use optical systems which are protected by windows at the scanning end to read the bar code symbol On wand scanners the window is located in the tip Laser and CCD scanners have a larger and more noticeable viewing window It is important to keep these optics clean because just like the lenses on reading glasses if they become dirty scratched or smudged they won t work properly If...

Страница 58: ... Welch Allyn test targets If you need more information on these measurements contact your Welch Allyn representative B 2 Optical Specifications Scanning Direction Single Line Unidirectional Scan Rate 120 scans per second See chart below Scan Speeds Scans Second Approximate Lateral Scan Speed mm Sec Inch Sec 120 5 127 Lateral Motion Sensitivity 5 inches per second 254mm sec Scan Width 2 4 inches 61...

Страница 59: ...ce 37 5 Tilt Angle Controlled by bar code length and height for linear codes See Figure 3 4 Skew Angle 30 to 30 degrees See Figure 3 4 Specular reflection 0 to 10 degrees Pitch Angle 7 to 7 degrees on 7 5 mil See Figure 3 4 Light Source Illumination Visible Red LED Wavelength 645 nm 30 CCD Type Standard Resolution Standard Performance Standard Resolution Enhanced Performance High Resolution Enhanc...

Страница 60: ... Connector Communications Port Pin Signal 1 Shield Function Cord Shield 2 Trigger Enable 3 Ground System Ground 4 Receive Data Input RX Data 5 TX Data 6 VCC 5VDC Power Input 7 RTS Ready to Send Output 8 CTS Clear to Send Input Transmit Data Output Trigger Signal to Decoder Scanner Enable Input State depends on use Indicators Beeper See descriptions below Beeper The good read no read beeper indicat...

Страница 61: ... 000 Pascals Sea level to 3000 meters ESD 15 KV A drain path for ESD should be provided when installing a SCANTEAM 3700PDF in the host system Shock Drop Test Sustains three 3 drops from 4 feet 1 2 meters to a non yielding surface Mean Time Between Failure Ground Benign 45 000 hrs minimum will vary among models B 5 Mechanical Specifications 3700PDF Width 3 5 Inches 89mm Length 2 9 Inches 75mm Heigh...

Страница 62: ...ines which could fool the scanner Specks or blemishes in the white spaces or false or missing bar sections could be interpreted by the reading equipment as part of the code Generally the width of such flaws is more serious than the height Code symbols should be rejected if these defects are present Definition The bars in the bar code symbol should be well defined Their edges should not be rough or...

Страница 63: ...TS 9 VCC 5VDC unused Shell Shield Drain 9 Pin D Female P1 To Host System P1 P2 P2 P3 Optional connector for external power supply To SCANTEAM 3700PDF Interface Port Pin 1 Pin 8 Pin 2 Pin 4 Pin 3 Pin 1 Pin5 Pin 1 Pin 9 Pin 6 Connector Pinouts 1 VCC 2 GND 3 Unused 4 Unused Shell Shield Drain 4 Pin Mini Din Female Optional P3 Cable part number 42205204 01 or 42205204 02 external power required Cautio...

Страница 64: ... four spaces and can be divided into 17 equal modules The X dimension is the width of a single module The Y dimension is the height of the codeword C 2 2 Number of Columns and Rows Every PDF417 label is a matrix of codewords You pick the number of columns 1 30 and rows 3 90 in the matrix For example to print a label which encodes 216 codewords you could choose 9 rows by 24 columns to equal 216 cod...

Страница 65: ...ility can be measured by 1 Tilt angle 2 Scan speed 3 Tolerance to label damage C 3 1 Tilt Angle When reading PDF417 labels the scanner first reassembles the codeword matrix in memory Bar code scanners are good at interpreting patterns of bars and spaces When reading PDF417 labels the scanner has the added task of being able to locate each codeword in the matrix This task is easiest when the scan l...

Страница 66: ...ccurately print at that density since it is a derivative of 300 dots per inch C 4 2 Making Y Dimension as Large as Possible Increasing the Y dimension improves readability by 1 Increasing the maximum tilt angle 2 Allowing higher scan speeds 3 Providing slight tolerance to label damage since the encoded information is repeated over the height of the row Unfortunately an increase in row height means...

Страница 67: ... encodes 12 44 528 digits 26 remaining digits 8 8 9 more codewords log10 900 Then 12 15 9 189 codewords are needed PDF requires one codeword to describe length of symbol and one to switch to numeric compaction mode Total 191 message codewords Message codewords 191 0 30 57 3 Round up to 64 error correction codewords 30 Use error correction level 5 3 Choose as many columns as space allows LH Label H...

Страница 68: ...eight to be as large as space allows LH Y rows No quiet zones needed Total number of code words in matrix message codewords error correction codewords 191 64 255 codewords Total number of code words in matrix columns rows 255 20 rows 255 rows 20 12 75 rows Choose the number of rows 13 At 13 rows compute Y to be Y LH 13 For LW 72mm X 0 17mm ...

Страница 69: ...ore for switch to numeric mode 194 194 12 groups of 44 digits 15 14 remaining codewords log10 900 40 digits Then this label can hold max 12 44 40 568 digits For LH 22mm Y 1 69mm The actual number of digits one can encode in this label is Total number of code words in matrix columns rows 20 13 260 ...

Страница 70: ...S T U V W X Y Z _ a b c d e f g h i j k l m n o p q r s t u v w x y z DEL CONTROL FUNCTION DEFINITIONS NUL SOH STX ETX EOT ENQ ACK BEL BS HT LF VT FF CR SO SI DLE DC1 DC2 DC3 DC4 NAK SYN ETB CAN EM SUB ESC FS GS RS US SP DEL Null or all zeros Start of heading Start of text End of text End of tranmission Enquiry Acknowledge Bell or alarm Backspace Horizontal tabulation Line Feed Vertical tabulation...

Страница 71: ...D 2 ASCII Conversion Table ...

Страница 72: ...t sees it ASCII is an acronym for the American Standard Code for Information Interchange It is a data communications protocol for data transmission between an originating and a destination interface 128 coded characters are included comprising 96 noncommunications data characters and 32 control characters It should be noted that most bar code symbologies are unable to encode the full ASCII set Asy...

Страница 73: ...host device Welch Allyn has a standard set of lower case Code ID s These are given in Table 4 2 See also Port ID Code 39 Check Character Included is a decoder option When enabled with Code 39 check character required the check character will be confirmed and included in the data message Code 39 Check Character Required is a decoder option When enabled Code 39 s checksum will be calculated and conf...

Страница 74: ...Distance is the distance of highest resolution in front of the scanner window Host Computer refers to the data system s controlling processor which interfaces with the decoder and other system elements to receive their data outputs and command their functions Interleaved 2 of 5 Check Digit Included is a decoder option When enabled with Interleaved 2 of 5 check digit required the check digit will b...

Страница 75: ...ain an Even or Odd number of 1 s PLCC is an acronym for plastic leaded chip carrier a type of integrated circuit package PLCC components are used in surface mount circuit board technology Port refers to the electrical connector on a decoder computer or other system component through which data is transmitted or received Port ID is a number that designates the scanner port from which a bar code sig...

Страница 76: ...The actual trigger mechanisms can be a push button switch photoelectric control internal object sense proximity sensor or multiple combinations of all of these Usable Scan Length refers to that portion of the scan path for which the scanner can accurately digitize bar code and maintain all its specifications This length is specified on a flat surface which is perpendicular to the optical axis of t...

Страница 77: ...Glossary 6 ...

Страница 78: ...0 5 0 0 6 5 0 4 035 5 3 035 0 6 5 0 4 035 5 0 5 0 0 65165 3 30 3 6 6453 0 4 5 0 4 5 0 4 0 30 3 26 0 3 1 3 5 0 0 3 0 4 9 0 0 4 53 1 5 0 4 0 6 5 0 035 0 503 44 54 5034 1 3 5 633 5 1 3 5 0 5 7 30 5 1 5 0 4 30 53 3 4463 6 59 58 63 1 3 5 1 3 563 0 301 45 503 1 3 563 7 6 5 0 4 45 5 0 045 4536 5 306 4 005 6 3 1 3 5 0 3 0 58 3 0 63 5 0 5039 37 65 0 33 59 37 33 59 37 3 4 0 4 00 3 8 3 4 3 15 0 945 3 8 3 4 3...

Страница 79: ...9 22 054 04 59 49 8 3 4 5 4 04 49 8 9 54 52 02 358 54 52 02 358 6 0 2 6 0 0 0549 6 5 2 09 4 8 2 5 054 490 0 0 0 5 8 0403 3 2 0 0 8 4 0 4 2 0 522 4 4 0 4404 08 054 1 4 2 1 6 2 8 2 054 02 02 4 2 3 52 8 4 5 04 8858 588 054 8 3 8 4 6 02 4 2 1 589 4 536 8 58 5 8 7 08 3 4 9 5 8 662 58 5 8 662 58 4 8 58 8 0 0 804 04 29 85 8 33 2 6 054 33 8 85 8 3304 4 6 8 80 9 8 4 2 0549 8 0 0 80 2 6 80 2 4 3 525 8 80 8 ...

Страница 80: ...Index 3 1 4 3 1 1 1 3 1 1 1 1 1 2 1 3 2 341 2 3 1 1 3 17 3 3 1 4 1 1 4 15 1 723 1 6 1 2 1 3 1 6 1 2 1 3 723 1 3 1 04 1 1 1 4 2 3 4 1 4 2 3 23 1 4 2 3 32 7 1 4 3 15 2 41 1 3 1 3 ...

Страница 81: ...Index 4 ...

Страница 82: ...rges and electricity the responsibility to protect it from static damage is solely that of the user The warranty is valid only if the wand has not been tampered with or serviced by any party unauthorized by Welch Allyn Inc as a repair facility THE WARRANTIES SET FORTH HEREIN ARE IN LIEU OF ANY AND ALL OTHER WARRANTIES EXPRESSED OR IMPLIED INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR...

Страница 83: ...Skaneateles Falls New York 13153 0187 3700PDF TM 4619 Jordan Road Rev B P O Box 187 Data Collection Division ...

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