User`s manual DD6000 controller
Contents
1. ee META IN 1 b i o EI Qc PE qmm Qmm LI IM LI LI 1 O AN Ll TT ro 5 ATT UTE UL 68 listing response time program 69 70 The following program can be used to calculated the response time for your network For several parameters of both data links a value should be entered Most values can be set with the bar code options in section 3 and 4 By pressing the lt CR gt key the default value for a parameter is selected An other value can be entered if the lt ESC gt key is pressed First a description of the parameter values to be entered is given OSEnet data link settings ck ck cock ckckckock ck ckck ck ck ck k kk number of decoder stations OSEnet baud rate average message length network2. NAH LIEN IE TL response time in seconds e o un o 8 o 10 20 30 40 50 60 70 80 99 100 0 10 20 30 40 50 60 70 90 90 100 network load in percents host controller baudrate in Kbps N 50 p 10 host baud rate 38K4 M 10 p 10 host baud rate 38K4 response time in seconds 0 12 24 36 48 60 72 84 96 108 120 message length in bytes number of decoder stations e OSENET settings default N number of decoder stations Host controller settings 1 parity bit 2 stop bits 7 data bits message length each control character 1 prefix p network load Poll sequence 515 Turnaround time host 200ys Turnaround time controller 200ys Tumaround time decoder 200 5 Figure 5 1 The response time of a network as a function of the network load the host baud rate message length and the number of decoders TIME ANALYSIS OF OSENET 47 48 pin assignment of ports 50 This appendix contains the pin assignment of the data input port 11 and communica tion ports O1 and O2 Indication of signalling direction in out is related to the DD6000 controller See figure A 1 description of the connector used A 1 PIN ASSIGNMENT PORT O1 SAND amp omNw pin Frame ground TxD RS232 RxD RS232 RTS RS232 CTS RS232 Not connected Logic ground Not connected T RS485 T RS485 TR RS485 TR RS485 Not connected Not connected Not connect
3. set the response time The period of time in which a controller has to receive a reac tion from a polled station If no reaction is received a poll time out will occur Notice that for this time the network baud rate and cable length should be considered After this label has been read a label from the table with read direct labels should be read response time decimal value of read direct label x 0 5 ms This time is different from the response time determined in section 5 The first read direct label is IN The response time is 0 x 0 5 ms 0 ms This is the minimum response time The first read direct label is The response time is 255 x 0 5 ms 127 5 ms This is the maximum response time example set the number of errors If the controller receives incorrect data from a station or no reaction at all the controller can switch off the decoder in question temporarily With this option you can set the number of allowed errors which a controller can receive from a station before being switched off After this label has been read a label from the table with read direct alabesl should be read The decimal value of a label indicates the selected number of errors The maximum number of errors allowed is 51 set the recovery time The controller tries to switch stations which are off line on line again after a period of time selected with this options recovery time decimal value
4. lated by dividing the bits in the byte by the baud rate _ Start bit stop bit data bits _ 11 t B9 baud rate 125 88 usec 1 In which tbo is the time to transmit a single byte across the network decoder controller data exchange data flow 1 in fig 3 1 The time it takes to transmit a message of length M from the decoder to the control ler and to have this message acknowledged can be derived from the data exchange sequence indicated table 3 1 This time is given as tsc tool ta te ty 2 TIME ANALYSIS OF OSENET 41 In which tsc time to transmit a message from a decoder to the controller toon transmit time ty turnaround time for the decoder time to transmit data to the controller te turnaround time for the controller tr time to transmit an lt rr gt acknowledgement With equation 1 the number of bytes for the data exchange and the turnaround times for the decoder and controller equation 2 leads to lc 216 ty M 6 t t 4t 1 456 ms 88M us 3 In which tsc time to transmit a message from a decoder to the controller tho time to transmit one byte ta turnaround time for the decoder M message length te turnaround time for the controller contoller decoder data exchange data flow 2 in fig 3 1 The time needed to send a frame to the station can be derived from the data exchange tos taata la tr 4 sequence indicat
5. lt CR gt 1 lt ESC gt 2 580 GOSUB 1230 590 IF A CHR 13 THEN 620 6008 2 610 GOTO 630 LISTING RESPONSE TIME PROGRAM 73 620 5 1 630 PRINT 640 A 650 PRINT parity y n 660 WHILE LEN A 0 670 A INKEY 680 IF A CHR 89 OR A CHR 121 THEN PA 1 690 IF A CHR 78 OR A CHR 110 THEN PA 0 700 IF A CHR 13 THEN A 710 WEND 720 PRINT 730 A 740 PRINT turnaround time for host 750 PRINT lt CR gt 2e 4 s lt ESC gt value 760 GOSUB 1230 770 IF A CHR 27 THEN 800 780 TH 0002 790 GOTO 810 800 INPUT your value TH 810 PRINT 820 A 830 PRINT please refer to appendix E 840 PRINT protocol first table s econd table set n ow 850 PRINT 851 REM TABLE 1 NO ADDITIONS TABLE 2 INTERMEC 860 WHILE LEN A 0 870 A INKEY 880 WEND 890 IF A CHR 70 OR A CHR 102 THEN 920 900 IF A CHR 83 OR A CHR 115 THEN 950 910 IF A CHR 78 OR A CHR 110 THEN 980 920 Tch M 8 PA D S HB 0004 TH 930 Thc M 9 PA D S HB 0004 2 TH 940 GOTO 1190 950 Tch M 4 PA D S HB 0002 TH 960 Thc M 5 PA D S HB 0004 TH 970 GOTO 1190 980 PRINT please refer to table 4 1 for controller host data exchange 990 PRINT 1000 INPUT number of bytes for from host poll CHP 1010 PRINT 74 LISTING RESPONSE TIME PROGRAM 1020 INPUT
6. The poll cycle time is the time required to poll al stations on the network without exchanging data In formula too Nt N t teop tog tpg N 515ps In which toe poll cycle time poll execution time lp poll transmit time 2 bytes teop of Poll transmit time 1 byte tog poll generation time the delay between an lt EOP gt reception and the transmission of a new poll 250 for OSENET transmit time for one byte N number of stations THE OSENET SYSTEM 25 3 2 PROGRAMMING THE OSENET NETWORK Once the network is installed in accordance with the guidelines in section 2 3 several features of the network can be programmed by bar code menu or via the host com puter as explained in section 4 X If the controller is set with bar code menus the bar codes in this section can be scanned with a bar code reader connected to port 11 of the controller How to set the parameters is described extensively in section 4 1 of the User s manual DD6000 A table with read direct labels is present in appendix B of this manual This table is identical to the table in the decoder manual Appendix X 1 features labels which affect both the OSENET and or the controller host data link Scanning these labels makes this section partly superfluous Figure 3 2 With a bar code reader connected to port 11 of the controller OSENET features can be programmed 26 THE OSENET SYSTEM selection with
7. C E 5905 to mains serial device CONTROLLER 5 controller T T e e e CH scanning device serial device 1 li Ell scanning device Figure 2 1 Configuration for a network of decoders OSENET NETWORK EQUIPMENT up to 126 decoders connector box OSE cable serial device scanning device Without repeaters 31 decoders can be connected to the controller If more than 31 sta tions are connected to the controller groups of stations are connected to the controller in a tree like structure via repeaters If a network of decoders no decoders 32 is purchased these are the components that should be present DD6000 decoders DD6000 network controller cable work section 2 2 DD6000 decoders With each decoder purchased a power supply and a OSENET cable are supplied in addition The OSENET cable has DB25 female connector and 8 8 modular tele phone connector The latter is used to connect port O1 of the decoder to the connector box of the network DD6000 network controller With each controller purchased a power supply is supplied in addition 2 2 CABLE WORK The cable work physically connects the decoders to the controller which on its turn is connected to the host computer Many trade offs in cable length and interfaces can occur while
8. D D E and F corresponding to 10 11 12 13 14 15 The hexadecimal representa tion of the decimal number 107 is 6Bh 107 6 161 1 1 160 Longitudinal Redundancy Check LRC The frame check character The of the lt LRC gt character is the exclusive OR of the it bit of all characters in the frame Multi drop A communication link which allows more than two devices to be directly attached OSEnet allows up to 126 decoders to be attached to a single host computer via a controller Negative Acknowledgement NAK A control character sent to notify that data has been incorrectly received or not received at all after a time out period Sending a implies the retransmission of the incorrectly received data Network cable or Main cable is a Multi drop cable that establishes the physical link between the controller s port O2 and the decoders port O1 Off line station Pertaining to a decoder part of the network but not polled The pres ence of the decoder station does not affect the poll cycle time On line station Pertaining to a decoder part of the network and periodically being polled OSEnet cable The physical link between the controller decoders of the network and their belonging connector boxes Overhead The characters sent next to the actual data These characters are needed to control the data exchange Poll A periodic interrogation from the decoders by the controller If a poll for a certain st
9. e ke ke ee ee ke e e e M 30 PRINT 40 INPUT number of decoder stations N 50 PRINT 60 PRINT OSEnet baud rate qe 70 PRINT lt CR gt 125000 lt ESC gt value 80 GOSUB 1230 90 IF A CHR 27 THEN 120 100 OB 125000 110 GOTO 130 120 INPUT your value OB 130 PRINT 140 A 150 PRINT average message length 160 PRINT lt CR gt 10 lt ESC gt value 170 GOSUB 1230 180 IF A CHR 27 THEN 210 190 M 10 200 GOTO 220 72 LISTING RESPONSE TIME PROGRAM 210 INPUT your value M 220 PRINT 230 A 240 PRINT network load in 96 ET 250 PRINT lt CR gt 10 lt ESC gt value 260 GOSUB 1230 270 IF A CHR 27 THEN 300 280 p 10 290 GOTO 310 300 INPUT your value p 310 tsc 12 M 11 OB 0004 320 tcs 10 M 11 OB 0002 330 PRINT 340 PRINT 350 PRINT Vk oe ke oe e e e e e hec ee e e e e e e ke host controller data link settings kk ee e ke e ke e ke e ce e e M 360 PRINT 370 A 380 PRINT host baud rate si 390 PRINT lt CR gt 9600 lt ESC gt value 400 GOSUB 1230 410 IF A CHR 27 THEN 440 420 HB 9600 430 GOTO 450 440 INPUT your value HB 450 PRINT 460 A 470 PRINT number of data bits 2 480 PRINT lt gt 7 lt ESC gt value 490 GOSUB 1230 500 IF A CHR 27 THEN 530 510D 7 520 GOTO 540 530 INPUT your value D 540 PRINT 550 A 560 PRINT number of stop bits D 570 PRINT
10. load in The number of decoders connected to your net work Enter a value 1 126 The transmission speed across the network Default is 125Kbps The average length of data send from the decoder stations to the host For instance if most of the time UPCA codes are read the message length is 12 If 50 decoders are on line and on 5 decoders a total of 10 scanners are reading labels simulta neously the network load is 2096 oboe eee ee host controller data Link settings PERE Ra xx host baud rate number of data bits number of stop bits The baud rate for the host controller data link Default value is 9600 bps A transmission speed of 38400 baud is recommended The number of data bits can be 7 or 8 Default is 7 data bits The number of stop bits can be 1 or 2 Default is 2 stop bits LISTING RESPONSE TIME PROGRAM Fi please refer to table 4 2 for host controller data exchange number of bytes for from host poll The number of bytes for a poll can be 1 2 or 3 number of bytes for first to host acknowledgement The number of bytes is can vary between 1and 5 number of bytes accompanying the data bytes The number of additional bytes is can vary between 3 and 5 number of bytes for second to host acknowledgement The number of bytes is can be 1 or 5 BASIC PROGRAM LISTING 10 CLS 20 PRINT M kc oe ke e ke e ee e ke e ke e ee ee e e ce ke ke ke e e ke OSEnet data link settings ce ke Xe ee ke e ke
11. number of bytes accompanying the data bytes CHD 1030 PRINT 1040 INPUT number of bytes for from host acknowledgement CHA 1050 TEOT 1 1060 PRINT 1070 PRINT please refer to table 4 2 for host controller data exchange 1080 PRINT 1090 INPUT number of bytes for from host poll HCP 1100 PRINT 1110 INPUT number of bytes for first to host acknowledgement HCA1 1120 PRINT 1130 INPUT number of bytes accompanying the data bytes HCD 1140 PRINT 1150 INPUT number of bytes for second to host acknowledgement HCA2 1160 FEOT 1 1170 Tch CHP CHD CHA TEOT PA D 0004 TH 1180 Thc M HCP HCA1 HCA2 FEOT PA D 5 HB 0004 2 TH 1190 Tpe 000515 1200 Tresp 2 1 p 100 N p 100 tsc tcs N p 100 Tch Thc 1210 PRINT the response time is Tresp s 1220 GOTO 1280 1230 WHILE LEN A 0 1240 A INKEY 1250 IF A CHR 13 THEN RETURN 1260 IF A CHR 27 THEN RETURN 1270 WEND 1280 END LISTING RESPONSE TIME PROGRAM 75 76 LISTING RESPONSE TIME PROGRAM 77 parity y n For even odd mark and space enter y es If no parity is set enter n o turnaround time for host Depends on the program running on your host computer and is not easy to determine please refer to appendix E protocol please number number number number 78 refer to of bytes of
12. 5 interface when a twisted pair cable is used The value of 500 meter for a transmission speed of 125 kbps should be considered to be a very conservative value Larger cable lengths are probably possible OSENET NETWORK EQUIPMENT 13 10K 2 12K E 500 E gt o 100 o o 10 10K 100K 125K 1M 10M data signalling rate in bps Figure 2 3 Cable length as function of the signalling rate for the RS422 485 interface The network cable connects the controller to the decoder via the connector boxes The dimensions of the connector box as shown in figure 2 4 are LxW xD 55x49 x 20 mm cut away for cable work connector for 8p8 modular telephone connector Figure 2 4 Connector box 14 THE OSENET NETWORK EQUIPMENT At any time the connection should be as indicated in figure 2 5 other decoders pin z 9 10 1d 12 15 pin z 9 10 td 12 15 7 9 10 11 12 15 DD6000 network DD6000 decoder DD6000 decoder controller port O2 port O1 port O1 DB25 female connector DB25 male connector DB25 male connector connection of pin 15 is optional it can be used for repeater control Figure 2 5 Pin connection for OSENET In this figure is pin 7 GND Logic ground pin 9 TR Receive differential voltage pin 10 TR Receive differential voltage pin 11 T Transmit differential voltage pin 12 T Transmit differential voltage pin 15 R C Repeat
13. ASSIGNMENT OF PORTS PIN ASSIGNMENT PORT 11 See figure A 2 description of the connector used pin in out 1 start of scan in 2 TTL in in 3 Good read out 4 Motor failure sense in 5 Trigger switch in 6 LED enable out 7 Ground 8 Ground 9 5 front view HA pin 5 pin 1 dogod pin 9 pin 6 KA for port 11 use female type connetor description signal from peripheral to indicate a scan has started data from peripheral confirmation of a good read by the decoder signal for a defective motor signal for triggering DD6000 signal to enable scanner after trigger cross section A A top view Figure 2 Standard 089 connector used for port 11 PIN ASSIGNMENT OF PORTS 53 54 table with read direct labels 55 56 The read direct labels can be used to 1 example 2 example 3 example enter numerical data from 0 to 255 decimal indication if the label below is read after the set station off line has been read station 8 will be set off line set alternative control characters ASCII indication if a poll from the host should be preceded by an ASCII character BS the label below should be read 1 decimal ASCII hexadecimal find the hexadecimal representative of the bar code labels reading the code with hexadecimal value 08 after the l
14. CD LED LF LRC NAK OSENET OSI PC RAM ROM RI RS End of Poll End of Transmission ASCII symbol 04h Electro Static Discharge End of Text ASCII symbol 03h Frequency Form feed ASCII symbol OCh File separator ASCII symbol 1Ch Group separator ASCII symbol 1Dh Identification International Electrotechnical Commission International Standards Organisation Length Liquid Crystal Display Light Emitting Diode Line Feed ASCII symbol Longitudinal Redundancy Check Not Acknowledged ASCII symbol 15h Opticon Sensors Europe Network Open Systems Interconnection Personal Computer Random Access Memory Read Only Memory Ring Indicator Recommended Standard LIST OF ABBREVIATIONS RS RTS RxD SOH STX TTL TxD LIST OF ABBREVIATIONS Record separator ASCII symbol 1Eh Request to Send Received Data Start of Heading ASCII symbol 01h Start of Text ASCII symbol 02h Transistor Transistor Logic Transmitted Data Volt unit of potential Width vi the DD6000 network controller Remove the system components from their packing and inspect them for any evidence of physical damage If the shipping container shows external damage and the controller does not operate properly get in contact with the shipping firm for a claim Keep the packing It should be used whenever the controller is transported for servic ing Damage caused by improper repacking is not covered by th
15. SIS OF OSENET In this section formulas are derived to calculate the response time for your specific network Figures help you to get a good impression of the speed of the network The guidelines indicated at the end of the section should be followed if the response time turns out to be too long APPENDICES Appendix A describes the pin configuration of the ports of the controller Appendix B contains a table with read direct bar code labels Appendix C features a listing of a BASIC program to calculate the response time for your network Appendix D is the trouble shoot section Appendix E contains a glossary of terms in which technical terms are explained ii INTRODUCTION LISTOF ABBREVIATIONS A Ampere unit of Current AC Alternating Current ACK Acknowledge ASCII symbol 06h ANSI American National Standards Institute ASCII American Standard for Code Information Interchange CISPR French initials for the International Special Committee on Radio Interference CR Carriage Return ASCII symbol ODh CTS Clear to Send D Depth DC Direct Current DCD Data Carrier Detect DCE Data Communications Equipment DLE Data Link Escape ASCII symbol 10h DOS Disk Operating System DSR Data Set Ready DTE Data Terminating Equipment DTR Data Terminal Ready EMC Electro Magnetic Compatibility ENQ Enquiry ASCII symbol 05h LIST OF ABBREVIATIONS EOP EOT ESD ETX FF FS GS IEC ISO L
16. User s manual DD6000 controller controller for the OSENET network Copyright 1993 Opticon Sensors Europe B V All Rights Reserved This manual may not in whole or in part be copied photocopied reproduced trans lated or converted to any electronic medium or machine readable form without prior written consent of Opticon Sensors Europe Limited warranty and disclaimers By opening the package of this network controller you agree to become bound by the liability and warranty conditions as described below Under all circumstances this manual should be read attentively before installing and or using the product In no event Opticon Sensors Europe will be liable for any direct indi rect consequential or incidental damages arising out of improper use of both the hard ware and software A serial number appears on all Opticon products This official registration number is strictly related to the device purchased Please ensure that the serial number appear ing on your Opticon device has not been removed Servicing by Opticon s Technical Department can be only carried out under warranty if this number appears on the device All Opticon products are warranted for a period of one year after purchase covering defects in material and workmanship Opticon will repair or at its discretion replace products that prove to be defective in material or workmanship under proper use during the warranty period Opticon will not be liable in case the p
17. abel set network baud rate sets the baud rate 9600 baud If it is read after the set response time label has been read the maximum allowed response time will be 4 5 ms TABLE WITH READ DIRECT LABELS 57 1 1 1 i 1 T D 1 3 E 1 HA HA ES CO KIT c c NN ME MUND MA IN Mm N UC MA 1111111 MM I MT INN L 1 e a 1M NN MN IM MM MM WENN u NM MM E MM MM MM MM MIN HI MM MU MM NN EA MM BINE MUI NN WIM MM MM NEA MM MM MM MM MM MN MM mm MM MN A LA UUAA UL ee II MM
18. ata Let the number of stations be 50 N 50 and the message length be 10 characters M 10 for all stations Then Apart from the fact that the change of occurence is virtually impossible the data trans missions across both data links are running almost parallel the change that all stations have data to transmit at the same time is not very large example The latter consideration is not very realistic In this example a formula for a typical response time still on the pessimistic side will be derived Assumed that p of all N decoders is transmitting data the length of the data is 10 characters M 10 for the decoder controller data link 125Kbps 9 data bits 1 start bit 1 stop bit the baud rate for the host controller data link is 38K4 kbps for the host controller data link 2 stop bits 1 parity bit 7 data bits the prefix for all control character for the host controller data link is one character TIME ANALYSIS OF OSENET 45 poll execution time t 515ys section 3 1 With these assumptions t 2 34ms 1 96ms t 26 07ms t 26 79ms Not all stations want to transmit data However all stations are polled Suppose that the first 100 p of the stations are polled and the first p of the station have data to send Once this data has arrived at the controller it is sent to the host From the host it is sent back to the controller and back to the station in question The data transmission on al
19. ation is sent only this station is allowed to react with data or an EOP message Poll cycle time The time to poll all stations connected to the network without exchanging data 82 Poll execution time The time to finish a complete sequence of polling a station receiving an EOP message and generating a poll for the next station Poll generation time The time between reception of an EOP message and transmis sion of a new poll by the controller Recovery time The period of time after which stations set off line the controller after a number of errors will be set on line again Response time 1 The time it takes your system to have a reaction at a decoder sta tion after a lable has been read here Response time 2 The period of time in which a controller ahas to receive a reaction from a polled station RS232 An industry standard for communication between computers and various types of peripheral equipment RS422 485 An industry standard for communication in multipoint systems RS422 is employed for point to point interconnections whereas RS485 is employed in a multi point environment Start of Text STX A control character preceding a sequence of characters that is to be interpreted as an entity e g text or message 83 84 85 86 87 88
20. bytes of bytes of bytes f irst table s econd table set n ow Standard values for the control characters for the host controller data link can be selected Refer to appendix X is you want to use default settings With the first table a minimum of control characters is selected for data control across the data link With the second table Intermec set tings are selected Once the first or second table are selected the response time is calculated If an n is entered the number of bytes for the host and controller data exchange should be set first table 4 1 for controller host data exchange for from host poll The number of bytes for a poll can be 1 2 or 3 accompanying the data bytes The number of additional bytes is can vary between 3 and 11 for from host acknowledgement The number of bytes is can be 1 or 2 for from host acknowledgement The number of bytes is can be 1 or 2 glossary of terms 79 80 In this appendix only terms related to the DD6000 network are explained Terms not present in this glossary probably are present in the glossary of the manual for the DD6000 decoder Acknowledgement ACK A control character sent to notify that data has been cor rectly received Buffer Part of memory in which data can be stored before being processed A buffer is needed if a device can receive data more quickly than it can process that data Control charaacters All ASCII characters with a co
21. de 20h plus the DEL charac ter ASCII code 7Fh These character have a data control function insteasd of repre senting an alphanumeric hcaracter Data Link Escape DLE Control characters preceded by a lt DLE gt character are considered to be normal data characters Differential Voltage A method for signal transmission The voltage difference between two lines determines whether a 1 is transmitted The RS422 485 uses differen tial voltage for signal transmission This way of signal transmission is less sensitive to noise End of Poll EOP Acharacter send by a decoder station as a reaction on a poll enquiry to indicate that is has no data to send End of Text EOT A control character that indicates the end of a data frame End of Transmission Concludes a data transmission This EOT character is used to signal the end of any previous communication The lt EOT gt character should not have a prefix Enquiry ENQ A control character to indicate a response message is requested Error message An audible of visual indication of hardware or software malfunction or of an illegal data entry attempt 81 Full duplex A transmission channel that provides simultaneous transmission of data between two devices in both directions Hexadecimal A number system with a base of 16 The symbols used in this system are the decimal digits O through 9 and six additional digits which are represented as A B
22. ders can also be switched on The software version and DD6000 OSENET will appear on the LCD of the decoders Up to 126 decoders can be connected to OSENET If more than 31 stations are con nected to the controller groups of stations are connected in a tree like structure via repeaters Please refer to the manual accompanying the repeater OSENET NETWORK EQUIPMENT 17 If the standard cable work is not used make sure that the connection between control ler and decoders is made according to figure 2 3 In which pin 7 GND Logic Ground pin 9 TR Receive differential voltage pin 10 TR Receive differential voltage pin 11 spe Transmit differential voltage pin 12 T Transmit differential voltage pin 15 Repeater Control Once all devices are properly connected and switched on the network can be set up Make sure that the decoders in the network are set on OSENET page 37 of the User s manual 006000 A unique station ID 1 126 should be given to each decod er The station ID can be selected with the Read Direct Labels pages 109 121 of the User s manual DD6000 If parameters of a decoder are set with the cloning option the station ID should be adjusted afterwards The OSENET network protocol features several parameters which can be set These parameters will be described in part 3 of this manual OSENET network protocol 18 THE OSENET NETWORK EQUIPMENT the OSENET system 20 The OSENET
23. designing the network The maximum permitted cable length depends on the interface and cable type used Three sorts of cables are available OSE cable to connect the decoder controller to the belonging con nector box Network cable or main cable This cable goes from the connector box belonging to the controller to the connector boxes belonging to the decoders Host controller cable This cable connects the controller to the host computer 12 THE OSENET NETWORK EQUIPMENT maximum 500m for 125 Kb network cable twisted pair Figure 2 2 Cable work for the OSENET network The OSE cable The OSE cables are used to connect the DD6000 decoder to the connector boxes You are advised to keep these cables as short as possible The maximal length of this cable is approximately 2 meters For longer cables you are advised to use shielded twisted pair cables A DB25 connector is used to connect the cable to the decoder For con nection to the connector box an 8p8 modular telephone plug is used Please refer to appendix A for a detailed description of the connectors used The network cable or main cable The maximal permissible length of network cable depends on the transmission speed used Increasing the cable length means increasing exposure to noise and signal dis tortion Therefore you are advised to restrict the cable length to a minimum Figure 2 3 gives the data signalling rate versus the cable length for the RS422 48
24. e is switched off This manual contains the following parts 1 THE DD6000 NETWORK CONTROLLER The DD6000 network controller is an interface control device used to transpose data coming from a number of decoders into a data stream suited for the host computer Mechanical features of the controller shown in this part are very similar to the features of the DD6000 decoder This part also describes technical specifications of both soft INTRODUCTION i ware and hardware of the controller 2 OSENET NETWORK EQUIPMENT OSENET is a full duplex multidrop RS485 connection allowing the connection of sev eral stations to a shared host device Up to 126 decoder stations can be connected This section describes the installation and setup of the network Guidelines in case non standard cable work is used are indicated here Moreover some features of both controller decoders and host controller communication are shown 3 THE OSENET SYSTEM Data exchange across the network has to be managed according to certain rules the OSEnet protocol In the first section of this part the protocol is analised In part 5 the information about the protocol will be used to calculate the response time of the net work In the second section bar code menus are present which allows you to program some features of the network 4 CONTROLLER HOST COMMUNICATION PROTOCOL This section describes the communication between the controller and the host 5 TIME ANALY
25. e programmed by scanning bar code labels in the THE DD6000 NETWORK CONTROLLER programmer s guide with a bar code reader connected to port 11 PROGRAMMING FEATURES host controller communication features baud rate handshake protocol communication protocol interface type parity number of stop bits OSENET network features baud rate decoder response time decoder recovery time maximum number of errors before off line number of stations decoders separate station on off line AND MORE THE DD6000 NETWORK CONTROLLER OSENET network equipment 10 If a network of decoders is purchased cable work is necessary to connect the DD6000 decoders to the network controller Opticon can either deliver standard cable work or meet the needs of the customer Specifications and guidelines for the cable work are given in section 2 2 Section 2 3 contains detailed instructions for installation of the network A network not meeting the guidelines and requirements indicated in this sec tion is not guaranteed to work properly The last section shows you how to start up the equipment once the network has been installed 2 1 CONTROLLER AND DECODERS In a network configuration decoders and controller are positioned as in figure 2 1 HOST connection to a serial port ver ES
26. e warranty At any time the following components should be present this manual the DD6000 network controller 5 Volt DC power supply For the network Opticon can either deliver standard cabling resources or meet the needs of the customer In this part mechanical features and technical specifications of the DD6000 control ler will be described A description of how to install the network is given in part 2 OSENET network equipment Figure 1 1 Components present in packing of DD6000 network controller THE DD6000 NETWORK CONTROLLER 3 1 1 MECHANICAL FEATURES TOP VIEW GOOD READ LED POWER ON LED FRONT VIEW PORT I1 140 7 MOUNTING HOLE CONTROLLER ON OFF SWITCH REAR VIEW POWER PORT O2 0000000000000 0000000000000 000000000000 000000000000 PORT O1 Figure 1 2 Top front and rear view on the DD6000 network controller THE DD6000 NETWORK CONTROLLER FEATURE DESCRIPTION TOP VIEW good read LED Green LED indicates whether the data has been transmitted correctly power on LED Red LED indicates whether the power is on mounting hole Allows solid mounting in any position FRONT VIEW port 11 Port for connection of bar code scanning device such as wand or CCD scanner With the scanner bar code labels can be read to set several para
27. ed Not connected Not connected Not connected Not connected Not connected Not connected Not connected Not connected Not connected 5V in out description connected to housing out Transmitted Data transmit data to host computer in Received Data receive data from host computer out Request To Send desire demand to transmit data in Clear To Send permission of host to transmit data Signal Ground out Transmit differential voltage out Transmit differential voltage in out Transmit Receive differential voltage in out Transmit Receive differential voltage in out Vcc PIN ASSIGNMENT OF PORTS 51 A 2 PIN ASSIGNMENT PORT O2 pin in out 1 Frame ground 2 6 Not connected Logic ground 8 Not connected 9 TR RS485 in out 10 TR RS485 in out 11 T 5485 out 12 T RS485 out 13 24 Not connected 25 5V in out PA pin 1 pin 13 00000 0000000000 pin 14 pin 25 pin assignment is mirrored for female connector for port O1 use a male type connector for port O2 use a female type connector description connected to housing Signal Ground Transmit Receive differential voltage Transmit Receive differential voltage Transmit differential voltage Transmit differential voltage Vcc cross section A A wz top view Figure A 1 Standard DB25 connector used for port O1 and port O2 52 PIN
28. ed in table 3 2 This time is given as In which tes time to transmit a message from the controller to a decoder time to transmit data to a decoder ty turnaround time for the decoder tr time to transmit an lt rr gt acknowledgement 42 TIME ANALYSIS OF OSENET With equation 1 the number of bytes for the data exchange and the turnaround time for the decoders equation 4 leads to In which tes time to transmit a message from the controller to a decoder lbo time to transmit one byte ty turnaround time for the decoder M message length controller host data exchange data flow 3 in fig 3 1 Because the controller should be able to exchange data with any program running on a host computer the protocols for this data link are highly configurable In this section the worst case data exchanges for this data link are postulated For the host interface parameters the default settings are used Baud rate 9600 baud Data format 7 bit Start bit Stop bit O bit 2 bit Parity bit even Interface RS232 no hardware handshaking ton stop bits parity bit data bits _ 10 _ 1 04 ms 6 baud rate 9600 From these parameters the time it takes to transmit a single data byte can be calcu lated by dividing the bits in the byte by the baud rate In which tpn is the time to transmit a single byte across the host controller data link The data exchange sequence for sending a message with length M from the networ
29. er control The host controller cable The host controller cable has two DB25 connectors to connect the controller to the host computer Two interfaces are available RS232 and RS485 For short distances between host and controller the RS232 interface with a standard cable can be used For the relation cable length data signalling rate for the RS232 interface please refer to table 2 1 In figure 2 4 this relation is given for the RS485 interface You are advised to use a twisted pair cable if the cable length is 2 meters or more OSENET NETWORK EQUIPMENT 15 Baudrate Max cable length bits per sec meters 19200 75 9600 75 4800 150 2400 230 Table 2 1 The relation baud rate maximum cable length for the RS232 interface 2 3 INSTALLATION AND SETUP Once the decoders controller and additional components have been unpacked you can start with the installation of the network Before installing locate the used decod ers controller and belonging connector boxes and determine the cabling needed with in the back of your mind the guidelines for the cable work indicated in section 2 2 To set up the network with standard cable work follow these steps 1 Mount the connector boxes at an appropriate place 2 Mount the controller and decoders on a flat surface The surface may be vertical horizontal or any incline in between 3 Lay the cabling Connect the cores to the boxes in a way that the connec tio
30. for the decoder and controller The t4 is the time it takes for the decoder to process the data POLL received from the controller and send back a response The te is the time it takes for the controller to process the data received from the decoder and send back a response For both decoder and controller these times are 200 usec With a POLL and a RECEIVE READY 2 and 4 bytes are involved respectively as indicated in table 3 1 The M 6 consists of a message length of M bytes plus 6 bytes overhead The overhead is used for the station address network control field device control station control frame check and a flag to mark the end of a frame 22 THE OSENET SYSTEM CONTROLLER direction STATION max bytes involved POLL DATA gt RECEIVE READY Table 3 1 Station controller data exchange sequence controller decoder data exchange data flow 2 in fig 3 1 To send a message from the controller to a decoder station the data exchange as shown in table 3 2 is followed Data is sent from the controller to the decoder station After tg seconds the station transmits a RECEIVE READY to acknowledge the data reception Again the number of bytes involved are indicated in the right hand column CONTROLLER direction STATION max bytes involved DATA RECEIVE READY Table 3 2 Controller station data exchange sequence THE OSENET SYSTEM 23 1 station s sends data after a poll poll for s
31. k controller to the host computer is depicted in table 4 1 in chapter 4 The indication 1 char and lt gt refers to the additional characters which can be employed to configure the protocol required for the program running on the host computer toh th eng 2 gt lysis 1 7 The total time to transmit a message to the host and to react on the hosts acknowl edgement with an lt gt is given as TIME ANALYSIS OF OSENET 43 In which tch 7 th enq te th thack 7 time to transmit a message from the controller to the host time to transmit the lt EOT gt lt FS gt lt ENQ gt sequence turnaround time for the controller time to transmit data with additional control characters turnaround time for the host time to transmit an lt ACK gt time to transmit an lt EOT gt With equation 6 the number of bytes for the data exchange and the turnaround times for the controller and host assumed to be 200us equation 7 leads to In which ton ton to 2 tn M time to transmit a message from the controller to the host time to transmit one byte turnaround time for the controller turnaround time for the host message length host controller data exchange data flow 4 in fig 3 1 To send a message from the host computer to the network controller the data exchange the then 2l 2 ack 2th theot 9 sequence as shown in table 4 2 is fo
32. l data links happen sequential in time In formula Tres typ 1 p Ntye Nptcn 1 p Ntye Nptes The diagrams on the next page give an impression of the speed of a network based on the latter formula In each figure only one parameter is a variable whereas the other parameters are constants These constant values are indicated in the upper left corner of each diagram In appendix C a listing of a BASIC file is enclosed This program calculates a more pre cise response time for your network An extensive description of the program is given at the beginning of the appendix Reduction of response time If the response time turns out to be too long the following guidelines should be followed Increase the host controller baud rate Although the default value for the baud rate is 9600 baud most computers can handle a baud rate of 38K4 bps easily Reduce the overhead to a minimum The data frame for host con troller communication is highly programmable Control characters can sometimes be preceded by 4 characters Only use this feature if strictly necessary To a lesser degree this also counts for the OSENET data link Stations switched off should be set off line To prevent the con troller from polling station which are switched off the option on page 30 31 should be used to reduce the poll sequence of the network 46 TIME ANALYSIS OF OSENET 50 M 10 host baud rate 38K4 e o o
33. llowed time needed to send message of length M to the controller is In which the te 7 te ack P tata th 7 th eot 44 time to transmit a message from the host to the controller time to transmit an enquiry to the controller turnaround time for the controller time to transmit an acknowledgement to the host time to transmit data to the controller turnaround time for the host time to transmit an lt EOT gt TIME ANALYSIS OF OSENET the 2 5 25 10 ty 20 59 ms 1 04M ms 10 With equation 6 the number of bytes for the data exchange and the turnaround times for the controller and host assumed to be 200us equation 9 leads to In which the time to transmit a message from the host to the controller tbh time to transmit one byte te turnaround time for the controller th turnaround time for the host M message length With the equations 3 5 8 and 10 a worst case time response for one of N sta tions can be estimated The worst case time is the time which elapses between sending and receiving data on a station In this case all N stations are reading data whereas the considered station is the last one to send its message All messages are sent from the controller to the host processed by the host and sent back to the controller The tresp SOtsom 10 SOtonm 10 SOthem 10 S0tos 10 3 2 S 11 considered station is the last one to receive its d
34. meters for OSENET and configuration of the host controller data link protocol REAR VIEW port O1 This port should be connected to the host computer port O2 This port is used for connection to the decoders via the OSENET cabling power 5 Volt DC power supply THE DD6000 NETWORK CONTROLLER 5 1 2 TECHNICAL SPECIFICATIONS HARDWARE AND ELECTRICAL FEATURES Power supply voltage Power supply current Operating temperature Storage temperature Humidity Weight Dimensions Vibration Shock ESD EMC Indicators Memory Connectors Devices supported Interfaces 5 0 5 150 mA without peripherals attached 10 to 70 Celsius IEC 68 2 1 and IEC 68 2 2 40 to 125 Celsius 20 95 non condensing 2709 LxWxD 127 0 x 140 7 x 31 2 mm IEC 68 2 6 5 Hz f 55 Hz Axis 1G X Y Z IEC 68 2 27 Pulse half sine T218 ms peak acc 294 m s IEC 801 2 up to 10 KV contact discharge CISPR22 radio interference class B IEC 801 3 radiated EM fields class 3 IEC 801 4 electrical transient burst class 3 2 LEDs 1 Buzzer 256 bytes EEPROM 32 Kbytes PROM 130 Kbytes SRAM Port 11 9 pins AMP squeeze to release male connector Port O1 DB25 female connector Port O2 DB25 male connector Port I1 wand CCD Port O1 host computer Port O2 DD6000 decoders via OSENET Port 11 bar code reader Port O1 RS232 RS422 485 Port O2 RS485 OSENET The DD6000 network controller can b
35. nals ANSI X3 28 is a user configurable protocol It is based on the ANSI X3 28 standard sub category 2 4 A4 This protocol features two way alternate non switched multipoint operation polling selection mechanism ACK NAK handshaking and longitudinal redun dancy check CONTROLLER HOST COMMUNICATION PROTOCOL 37 38 time analysis of OSENET THE OSENET SYSTEM 39 40 In this section formulas are derived which can be used to calculate the response time for the network designed Roughly the response time is defined as the time a DD6000 station has to wait to receive a response from the host after data has been read The response time depends on many things such as network baud rate host controller baud rate message length number of stations overhead etc Once the network is installed and the host controller protocol is configured the formu las derived in this section can be used to calculate a response time for your network to check whether it is quick enough If the calculated response time turns out to be too long a few guidelines to reduce this time are indicated at the end of this section First the time to send a message for all data flows indicated in figure 3 1 will be calcu lated The default communication parameters for the OSENET network are Baud rate 125000 baud Data format 9 bit Stop bit 1 bit Start bit 1 bit From these parameters the time it takes to transmit a single data byte can be calcu
36. network is a full duplex multi drop RS485 connection allowing the con nection of several stations to a shared host device In a network using OSENET one unit controls the flow of data across the network the DD6000 controller or primary sta tion All other stations DD6000 decoders attached to the network are secondary sta tions Section 3 1 in short describes the data exchange across the network Sequences for data exchange from the decoders to the controller and in the opposite direction require standard procedures which are always initiated by the controller The second section is the programmers part for the OSENET network In this section many parameters of the OSENET protocol can be set Bar code labels are present on each right page whereas a concise description of the function of the labels can be found on the left page 3 1 THE OSENET PROTOCOL The data flow across the network is controlled by the primary station the DD6000 net work controller as depicted in figure 3 1 The controller interrogates each decoder in turn to see if it wishes to transmit data This is called polling A decoder can only trans mit data when polled by the controller data flow 1 in figure 3 1 The data is packed in frames the OSENET frame Apart from the actual data these frames contain informa tion about the data address data type data synchronisation etc Data sent by a sta tion is buffered at the controller in order to be sent to the host comp
37. ns as shown in figure 2 5 are established 4 Make sure that all electrical devices to be used are switched off 16 THE OSENET NETWORK EQUIPMENT 5 Connect the DD6000 decoders with a OSENET cable to the belonging connector box The OSENET cable should be connected to port O1 of the decoder Make sure that the cable is connected properly by screwing tight the connector on the side of the decoder The modular connector is con nected properly if a click is heard while attaching it to the connector box 6 Connect the controller to the serial port of the host computer with the host controller cable The cable should be connected to port O1 of the controller Make sure that it is connected properly on both sides by screwing tight the connectors 7 Connect the controller with a OSENET cable to the belonging connector box The network cable should be connected to port O2 of the controller Make sure that the cable is connected properly by screwing tight the con nector on the side of the controller The modular connector is connected properly if a click is heard while attaching it to the connector box 8 Connect devices to the decoders 9 Use the 5V power supplies to connect both the DD6000s and the network controller to the mains 10 If all devices are properly connected the computer can be switched on 11 Next the network server and decoders can be turned on with the on off switch Devices connected to port O2 of the deco
38. of read direct label x 0 1 ms 32 THE OSENET SYSTEM PROGRAMMER S GUIDE set the response time set the number of errors set the recovery time LL gt gt IM 6 5 gt 33 34 controller host communication protocol direction CONTROLLER max bytes involved lt EOT gt FS lt gt 4 CHARS gt lt STX gt lt DATA gt lt 4 CHARS gt ETX lt LRC gt th gt 1 CHAR lt ACK gt Table 4 1 Controller host data exchange sequence direction CONTROLLER max bytes involved lt EOT gt GS lt ENQ gt lt 4 gt lt ACK gt th gt lt 1CHAR gt lt STX gt DATA lt 1CHAR gt lt gt lt LRC gt gt lt 4CHAR gt lt ACK gt Table 4 2 Host controller data exchange sequence 36 CONTROLLER HOST COMMUNICATION PROTOCOL host controller communication For host controller communication either the RS232 or RS 422 can be used If the distance between the controller and the host computer is long the latter is preferred Depending on the program running on the host computer the communication protocol should be set Three protocols are available free running ANSI X3 28 Intermec mode D In case free running is selected no protocol is active and data is transmitted in spite of control sig
39. ork controller for OSENET allows multiple DD6000 decoders to be connected to a single host computer The controller transposes the data streams com ing from the decoders into a single data stream which can be accepted by the host computer Conversely messages coming from the host and intended for a decoder have to pass the controller Both host controller and controller decoder communication has to take place according to certain rules the data link protocol These protocols take care of the integrity of the communication between the devices The controller is thus concerned with two separate data links one which connects it to the DD6000s and one which connects it to the host The first data link is described in part 3 The latter data link is described in part 4 In order to better comprehend the features of OSENET it is recommended to read the manual User s manual DD6000 before reading this manual The OSENET system allows for high speed data transmission across both data links The default baud rate for decoder controller communication is 125Kbps The DD6000 network controller supports two standard hardware interfaces for controller host com munication RS232 and RS422 RS485 The latter is extremely useful for network appli cations because it is less sensible to noise Both data link protocols are user programmable via bar code menus The adjustable parameters are stored in a non volatile memory so they remain present even when the devic
40. programmable features page Read Direct Labels Appendix C set the network baudrate 28 30 set the number of stations 30 31 set station off line 30 31 set station on line 30 31 test RAM 30 31 test EEPROM 30 31 set the response time 32 33 set the number of errors 34 35 set the recovery time 36 37 Table 3 3 Programmable features of OSENET For some features the table with read direct labels Appendix B should always be used whereas for other features a selection can be made out of labels available on the page in question THE OSENET SYSTEM 27 set the network baud rate The baud rate transmission speed for OSENET is the number of bits transmitted per second The baud rate can be vary in steps between 75 and 125K kbps bits per second Make sure that the baud rate of port O1 of all decoders on the network correspond to the baud rate set here please refer to the User s manual of the DD6000 page 56 57 to set the decoder baud rate 28 THE OSENET SYSTEM 00 03 06 09 0C MM MUI 01 04 07 0A 00 2 02 05 08 0B AM set first station in the range A decimal value should be read from the table with reaqd direct labels in Appendix B This label corresponds to the lowest number in the range of decoder stations set last station in the range A decimal value should be read from the table with read direct label
41. roduct is opened by unauthorised parties In such case the standard repair charge will be applicable The standard charge for repair will also be applicable in case no defect is found at all These conditions also apply for products that are still under warranty Therefore you are advised to always have the product s specifications at hand CONTENTS INTRODUCTI N une LIST OF ABBREVIATIONS ii 1 THE 006000 NETWORK CONTROLLER 1 1 1 Mechanical features 4 1 2 Technical 6 2 OSENET NETWORK EQUIPMENT 9 2 1 Controller and 11 2 2 Cable WOTK E tra er carn 12 2 3 Installation and 16 3 THE OSENET SYSTEM 19 3 1 The OSENET protocol sse 21 3 2 Programming aaea 26 4 CONTROLLER HOST COMMUNICATION PROTOCOL 35 5 TIME ANALYSIS OF 39 CONTENTS appendices A PIN ASSIGNMENT OF 49 B TABLE WITH READ DIRECT LABELS 55 C LISTING RESPONSE TIME 69 D GLOSSARY OF TERMS cnica 79 CONTENTS INTRODUCTION The DD6000 netw
42. s in Appendix B This label corresponds to the highest number in the range of decoder stations Please notice that all stations outside the specified range will be disabled disable station Decoder stations not used can be disabled After this label has been read a decimal value the station that should be disabled should be read from the table with read direct labels If a station is switched off but is not disabled it delays the poll cycle with a poll time out for the station considered An disabled station is not polled enable station Disabled decoder stations can be enabled by reading this bar code label After the label has been read a decimal value the station that should be ena bled should be read from the table with read direct labels test RAM Test the Static RAM of the network controller high beep is OK low beep is not OK test EEPROM Test the EEPROM of the network controller high beep is OK low beep is not OK Please refer to the trouble shooting section if one of these parts of memory are not OK 30 THE OSENET SYSTEM PROGRAMMER S GUIDE set first station in the range set last station in the range disable station enable station test RAM test EEPROM LL gt gt MANI gt gt gt LI ME gt D
43. tation s poll for station s 1 controller station s DATA from station s time 2 no data from station station sends an EOP poll for station s poll for station s 1 controller station s EOP from station s time 3 the controller polls the next station after a poll time out has occured poll for station s poll for station s 1 controller poll time out for station s gt station s time Figure 3 1 Possible reactions of a decoder on a poll 24 THE OSENET SYSTEM polling stations To poll the decoder station the controller simply sends a message to each station in turn inquiring whether or not the stations have data to send These polling mes sages contain the address of the station inquired Each decoder station knows its own address and only responds to its own polls although it receives all polls If the a decoder station has data to send it send data according to table 3 1 If not it sends back an EOP byte End of Poll If neither data nor an lt EOP gt byte is sent by the decoder the controller will generate a poll for the next station after a poll time out as depicted in figure 3 2 In this way all decoder station are polled The time it takes to finish a complete sequence of polling a station receiving an End of Poll and generating a poll for the next station is called the poll execution time
44. uter data flow 3 However first the controller has to convert the OSENET frame to a frame suitable for the controller host data link The data frame format for the host controller data frame can be configured in part 4 and depends on the program running on the host compu ter At the host the data is processed and a response is sent back to the controller data flow 4 At least this response contains information about the destination of the data At the controller the data frame is converted back to the OSENET frame Finally the controller sends this information to the station in question data flow 2 Data flow 1 and 2 will be described in this section The host controller data link flow 3 and 4 will exten sively be described in part 4 of this manual THE OSENET SYSTEM 21 HOST AD gt a mJ N as secondary stations station 1 station 2 polling all n stations station n Figure 3 1 Data flows considered for decoder host communication decoder controller data exchange data flow 1 in fig 3 1 The protocol for sending data from a decoder station to the controller data flow 1 in figure 3 1 is depicted in table 3 1 After receiving the poll it takes the decoder station ta seconds to react with the data Once all data is received by the controller it sends back a RECEIVE READY after seconds te to acknowledge the data reception The tg and tc are the turnaround times
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