Feig Electronic OBID i-scan ISC.LR200-A/B, Application Note

Page 1: ...APPLICATION NOTE final public 2003 12 03 N11200 0e ID B doc OBID i scan ID ISC LR200 A B ID ISC LRM200 A B Synchronizing RFID Long Range Readers using the Digital In Outputs...

Page 2: ...ONIC GmbH does not guarantee the correctness and completeness of the details given in this manual and may not be held liable for damages ensuing from incorrect or incomplete information Since despite...

Page 3: ...e maximum speed of the transponder in the antenna 10 3 Required components 12 4 Possible disturbances caused by mutual interference of the RFID systems 13 4 1 Minimum separations between two RFID syst...

Page 4: ...the system This interference depends on various factors Size Q form and orientation of the antennas with respect to each other Set transmitting power of the reader Distance between antennas Whether t...

Page 5: ...d outputs by having the reader firmware itself turning on only one antenna of several readers During this time the other readers turn off the HF field of the respective antennas Fig 1 Sequence of comm...

Page 6: ...d to supply the digital in outputs To trigger the reader synchronization process and define the timing sequence of the reads you need to adapt the configuration in the reader See section 2 1 1 Configu...

Page 7: ...e transponder the formula is TRT Timing of Inventory 10ms Other conditions A Transponder Response Time of less than 20ms is not allowed for synchronized systems The calculated Transponder Response Tim...

Page 8: ...ion Error and turns on the magnetic field of the antenna for Transponder Response Time TRT When there are two synchronized RFID systems in an RFID complex each reader requires one Transducer Response...

Page 9: ...e 4 bytes will be read from the transponders From the graph in the System Manual for the ID ISC LR200 Reader section Annex C Time Behavior of ISO 15693 Transponder paragraph Time Behavior for Inventor...

Page 10: ...e limit value can only be determined when all these data are known To help you here is the calculation for an ID ISC ANT800 600 A antenna with a transponder orientation parallel to the antenna vB trav...

Page 11: ...C GmbH Page 11 of 27 N11200 0e ID B doc Fig 2 Read zone length of the ID ISC ANT800 600 antenna transponder parallel to antenna SL 0 8 m tZ 0 33 s from Example 1 The maximum permissible traverse veloc...

Page 12: ...nual for ID ISC LR200 LR200 section X7 Inputs and section X6 Outputs Qty n terminal strips for connecting the cable between the readers Components needed for starting up Qty 1 ID ISC SATC A Automatic...

Page 13: ...antennas with respect to each other Synchronizing the antennas only minimizes the last two effects At a distance of 2 m or less between the systems additional shielding e g a metal plate should be in...

Page 14: ...g the transmission protocol the RF is always on but the readers send and receive the protocols in alternation This ensures that the second reader is not sending while the first reader is exchanging pr...

Page 15: ...ig 3 Position and size of the shield configuration using two ID ISC ANT800 600 antennas The shield should be installed in the middle between the two systems antenna assemblies Fig 4 Position and size...

Page 16: ...If the host computer does not have an RS485 port various RS232 RS485 converters are commonly available see Appendix A Recommended equipment and possible sources Fig 5 Wiring the serial interface The s...

Page 17: ...as shown in the diagram below The supply voltage should be provided by an external power supply Fig 6 Wiring the digital in and outputs To avoid noise on the data lines the resistors should be instal...

Page 18: ...H Page 18 of 27 N11200 0e ID B doc The resistor values depend on the supply voltage See installation guide for the ID ISC LR200 and Table 2 Table 2 Resistor values Voltage Resistor value 5 to 10 none...

Page 19: ...unique address This is set as follows 1 Configure COM port Step Description Note 1 Install the ISCStart software tool or ISOStart On the OBID i scan CD ROM 2 Connect the first reader ID ISC LR200 to t...

Page 20: ...addition to turning on synchronization cascaded the parameters Master or Slave and RF stays on or RF switched off must be configured The master can be any reader in the chain of synchronized devices S...

Page 21: ...all other readers set Cascaded and Slave For all readers the setting for Timeout should be calculated according to the formula under 2 1 1 Configuring the reader parameters for synchronizing 8 Select...

Page 22: ...requested by the host the buffer is initialized or a CPU reset is performed To retrieve the data the reader should be cyclically polled queried by the host using command 0x21 Read Buffer If the reader...

Page 23: ...or the first or the first two readers 5 Confirm with OK 6 Under Settings click on the Timer button 7 Set the timer Timebase to approx 100 ms 8 Confirm with OK 9 Clear the reader buffer by clicking on...

Page 24: ...easuring loops should be attached in the Middle of the antenna parallel to the conductor All readers must be set to BRM Mode and the Parameters configured in the Synchronization field See 5 3 Wiring i...

Page 25: ...SWR and Power Meter including SMA connectors female or appropriate adapters Qty 1 cable RG 58 C U approx 20 25 cm 7 8 9 8 in long with two male SMA plugs gen erally self assembled Qty 1 dummy load 50...

Page 26: ...er MFJ HF UHF SWR Analyzer Model MFJ 259B 1 8 170 MHz Vendors Austin Amateur Radio Supply USA 1 800 423 2604 VHT Impex Ecke Germany Tel 05224 9709 0 CIA HF Complex Impedance Analyzer 5012 5000 Vendors...

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