ID ISC.LR2500 ID ISC.LRM2500

Transcription

1 APPLICATION-NOTE ID ISC.LR2500 ID ISC.LRM2500 Synchronizing RFID Long Range Readers using the Digital Input/Output draft public (B) N e-ID-B.doc

2 Note Copyright by FEIG ELECTRONIC GmbH Lange Strasse 4 D Weilburg Tel.: With the edition of this document, all previous editions become void. Indications made in this manual may be changed without previous notice. Copying of this document, and giving it to others and the use or communication of the contents thereof are forbidden without express authority. Offenders are liable to the payment of damages. All rights are reserved in the event of the grant of a patent or the registration of a utility model or design. Composition of the information in this document has been done to the best of our knowledge. FEIG ELECTRONIC 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 all our efforts, errors may not be completely avoided, we are always grateful for your useful tips. The instructions given in this manual are based on advantageous boundary conditions. FEIG ELECTRONIC GmbH does not give any guarantee promise for perfect function in cross environments and does not give any guaranty for the functionality of the complete system which incorporates the subject of this document. FEIG ELECTRONIC call explicit attention that devices which are subject of this document are not designed with components and testing methods for a level of reliability suitable for use in or in connection with surgical implants or as critical components in any life support systems whose failure to perform can reasonably be expected to cause significant injury to a human. To avoid damage, injury, or death, the user or application designer must take reasonably prudent steps to protect against system failures. FEIG ELECTRONIC GmbH assumes no responsibility for the use of any information contained in this document and makes no representation that they free of patent infringement. FEIG ELECTRONIC GmbH does not convey any license under its patent rights nor the rights of others. OBID and OBID i-scan are registered trademarks of FEIG ELECTRONIC GmbH. I-CODE is a registered trademark of Philips Electronics N.V. Tag-it TM is a registered trademark of Texas Instruments Incorporated. FEIG ELECTRONIC GmbH Page 2 of 30 N e-ID-B.doc

3 Contents 1. Synchronizing Readers, Applications Purpose of Reader-Antenna synchronizing Synchronizing RFID Long Range Readers (Reader multiplexing) 5 3. The synchronous operation RFID Long Range Readers (Reader synchronization) Design notes Configuring the reader parameters for synchronizing Transponder Response Time Synchronization-Timeout Determining the maximum speed of the transponder in the antenna Required components Possible disturbances caused by mutual interference of the RFID systems Minimum separations between two RFID systems System structure Wiring the digital Inputs and Outputs (Reader multiplexing) Wiring the digital In/Outputs with 2 Readers Wiring the digital In/Outputs with 3 (4,5,6) Readers Wiring the digital Inputs and Outputs (Reader Synchronization) Wiring the digital In/Outputs with 2 Readers Wiring the digital In/Outputs with 3 or 4 Readers Configuring the readers for synchronizing Requesting data from the reader Appendix A: Helpful tools for constructing and testing the antennas 29 Recommended equipment and possible sources: FEIG ELECTRONIC GmbH Page 3 of 30 N e-ID-B.doc

4 1. Synchronizing Readers, Applications 1.1. Purpose of Reader-Antenna synchronizing Readers, antennas and transponders together form a RFID system. A single reader or RFID system in a room, building does not need to be synchronized. The transmitting energy of the reader which is radiated through the antenna is not limited to the particular read range. As a consequence, multiple RFID systems having the same transmission frequency located in the same room or building will mutually interfere with each other. This reduces the read range and reliability of 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 the antennas are shielded or not When planning RFID systems, a minimum distance between antennas should always be configured. For example, two RFID systems consisting of one each ID ISC.ANT310/310-A (310 mm x 310 mm) antenna and one Long Range Reader ID ISC.LR2500 with 4 W output power must be separated by at least 3 m. Larger antennas require a minimum separation of up to 10 m to avoid mutual interference. In summary, planning for RFID systems should always allow for a minimum separation between the antennas. See section 5.1. Minimum separations between two RFID systems If synchronizing the systems is not possible, interference can be prevented by proper shielding. FEIG ELECTRONIC GmbH Page 4 of 30 N e-ID-B.doc

5 2. Synchronizing RFID Long Range Readers (Reader multiplexing) In this context synchronization means that the magnetic field of the RFID Reader antennas are alternately turned on while all other antenna outputs on the readers are turned off. The switching of the HF-Outputs must will be carried out in the automatic modes (Buffered Read, Notification or Scan Mode) 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. In the ISO-Host Mode this switching must be carried out by the application software. Fig. 1: Sequence of communication between the readers MASTER SLAVE 1 SLAVE 2 IN OUT IN OUT IN OUT Communication takes place through the digital inputs and outputs of the digital synchronization port X2/ IN1 and X2/OUT1. The Master starts by sending a pulse to the next reader as soon as it has finished communicating with the transponder. The latter passes the signal to the next reader after finishing its read cycle. The last reader then passes the signal back to the Master. The necessary wiring between the reader will be described in 6.1. Wiring the digital Inputs and Outputs (Reader multiplexing) FEIG ELECTRONIC GmbH Page 5 of 30 N e-ID-B.doc

6 If more than one antenna is connected to the reader through a multiplexer, the RFID system starts with the first antenna of the Master. All other antenna outputs are switched off. After that antenna 2,3, will be switched on by the Master. After the last antenna a signal will be sent to the next reader. The number of antennas will be recognized by the reader by its configuration. Fig 2: Diagram of the communication between the reader (Reader multiplexing and Multiplexer) MASTER SLAVE 1 SLAVE 2 IN 1 OUT 1 IN 1 OUT 1 IN 1 OUT 1 Multiplexer Multiplexer Multiplexer Antenna: A A FEIG ELECTRONIC GmbH Page 6 of 30 N e-ID-B.doc

7 3. The synchronous operation RFID Long Range Readers (Reader synchronization) Reader Synchronization here means that all readers are switched on (HF-field) and operate synchronous. The sending of the data and receiving of the response from the transponder will be carried out parallel. If more than one antenna is connected to the reader through a multiplexer, the RFID system starts with the first antenna of the Master and the first antenna of the Slave 1,2,3,... All other antenna outputs are switched off.. The switching of the HF-Outputs and of the multiplexers will be carried out in the automatic modes (Buffered Read, Notification or Scan Mode) 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. In the ISO-Host Mode this switching must be carried out by the application software. Fig. 3: Diagram of the communication during synchronous operation oft he reader MASTER SLAVE 1 SLAVE 2 OUT IN OUT IN OUT IN Multiplexer Multiplexer Multiplexer Antenna: A A Communication takes place through the digital inputs and outputs of the digital synchronization port X2/ IN1 and X2/OUT1. After power up reset, all antenna outputs are switched off. Now, only the Master starts the communicating with the transponder at every connected antennas, sequentially. All antennas have been processed, the master sends a pulse (Output OUT1) to all Slave reader (Input IN1) and at his own trigger input (IN1). Therefore all readers start at the same time, each of the first antenna. The necessary wiring between the reader will be described in 6.2. Wiring the digital Inputs and Outputs (Reader Synchronization) FEIG ELECTRONIC GmbH Page 7 of 30 N e-ID-B.doc

8 3.1. Design notes Synchronizing using the digital input and output is possible only in Scan-, Notification and Buffered Read Mode of the ID ISC.LR2500 Reader! In the ISO Host Mode the synchronization must be carried out by the application software on the Host PC. In order to wire the digital in- and outputs of the readers together, a data line must be connected between the readers. See section: 6.1. Wiring the digital Inputs and Outputs (Reader multiplexing) 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: Configuring the reader parameters for synchronizing. The read speed is reduced by the alternate powering of the RFID systems. See section: Determining the maximum speed of the transponder in the antenna. Depending on the antenna shape, size and distance, various interference prevention measures need to be taken. See section 5.1. Minimum separations between two RFID systems. When the distances between antennas cannot be greater than 2 m, an additional shield must be installed between them. See section: 5. Possible disturbances caused by mutual interference of the RFID systems. FEIG ELECTRONIC GmbH Page 8 of 30 N e-ID-B.doc

9 3.1.1.Configuring the reader parameters for synchronizing Transponder Response Time For the reader to be able to read a transponder, the latter must remain within the magnetic field of the antenna until the read cycle is completed. The time the reader need to perform the anticollision and read the data at one antenna we call Transponder Response Time and could be set at the reader configuration (Air Interface: Time Limit) The Transponder Response Time is a function of the transponder model, the number of time slots, the number of transponders to be read and the amount of data. The Transponder Response Time (TRT) is calculated as follows. TRT = Timing of Inventory + (Timing of read function * Number of transponders * 1,1) + 10ms. If no data are read from the transponder, the formula is: TRT = Timing of Inventory + 10ms. Other conditions: - The minimum Transponder Response Time is 20ms. - The calculated Transponder Response Time is always rounded up to the next 10 milliseconds. - If ISO compatible transponders from different manufacturers are used, the timing of the slowest transponder should always be used as the basis. - If various transponder types are used which are not mutually compatible (e.g. I-Code 1 and I- Code SLI or Tag-it HF and Tag-it HF-I), then you must calculate TRT for each type. The sum of the individual values then gives the total TRT. The parameters Timing of Inventory and Timing of read function depend on the transponder type and the number of time slots and can be referenced in the System Manual for the ID ISC.LR2500 Reader. The calculated Transponder Response Time has to be set at each reader in configuration block Air Interface Using antenna multiplexing, the reader need the single TRT at every antenna. In this case the TRT must multiplied with the number of Output Channels. TRT = (Timing of Inventory + (Timing of read function * Number of transponders * 1,1) + 15ms) ) * Number of output channels If no data are read from the transponder, the formula is: TRT = (Timing of Inventory + 15ms) * Number of output channels. FEIG ELECTRONIC GmbH Page 9 of 30 N e-ID-B.doc

10 Synchronization-Timeout The Synchronization-Timeout is another important parameter. It determines two things: - The response time of the RFID system! The maximum required time until a transponder is read in a synchronized system. - The time the reader waits after turning of the antenna for another synchronization pulse from the previous reader. If the pulse does not arrive, it reports a Synchronization 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 Transponder Response Time, since the systems are alternately turned on and off. When there are more than two synchronized RFID systems, the Transponder Response Time must be multiplied by the number of systems. From this you can calculate the cycle time of the RFID complex which is set as the Timeout time in the reader ( Operating Mode Reader- Synchronization-TIMEOUT). Synchronization-Timeout = (TRT + 20 ms)* number of synchronized readers. The calculated synchronization timeout is always rounded up to the next ten milliseconds. FEIG ELECTRONIC GmbH Page 10 of 30 N e-ID-B.doc

11 Example 1: Synchronizing four personnel gates with ISO transponders (without antenna multiplexing): In the example we will assume that there are a maximum of 3 transponders in one personnel gate. In other words, the configuration Transponder : 1 Timeslot can be used in the reader. We further assume that 2 data blocks (block size 4 bytes) will be read from the transponders. From the graph in the System Manual for the ID ISC.LR2500 Reader, section: Annex C Time Behavior of ISO Host commands paragraph: Time Behavior for Inventory and Transponder we see: Time of Inventory for 3 transponders (1 Timeslot) => approx. 60 ms (3 x 20 ms) Read 2 data blocks (Philips SLI, Texas Instruments HF-I) = 12 ms TRT = 60 ms + (12 ms * 3* 1.1) + 10 ms = ms The Transponder Response Time is 110ms! The processing time or cycle time of the RFID complex and the Synchronization-Timeout to set would therefore be 4 x (110 ms + 10 ms) = 480 ms! Summary: Set a time of 480 ms in configuration block Operating Mode. Example 2: Synchronizing 4 personnel gates with ISO transponders (with antenna multiplexing): Two antennas at every gate = number of output channels = 2 Time of Inventory for 3 transponders (1 Timeslot) => approx. 60 ms (3 x 20 ms) Read 2 data blocks (Philips SLI, Texas Instruments HF-I) = 12 ms TRT = (60 ms + (12 ms * 3* 1.1) + 15 ms) * 2 = ms The Transponder Response Time is 225ms! The processing time or cycle time of the RFID complex and the Synchronization-Timeout to set would therefore be 4 x (225 ms + 10 ms) = 940 ms! Summary: Set a time of 940 ms in configuration block Operating Mode. FEIG ELECTRONIC GmbH Page 11 of 30 N e-ID-B.doc

12 3.1.2.Determining the maximum speed of the transponder in the antenna As described above, alternately turning the antennas on for 2 to n readers results in a reduction of the maximum read speed by 1/n. When doing your planning, you should therefore check whether the possible read speed and consequently the maximum traverse velocity of the transponders are compatible with the requirements of the application. The maximum traverse velocity of the transponders per system depends on the length of the read zone in the direction of motion and on the cycle time of the RFID complex. The precise 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-DA antenna with a transponder orientation parallel to the antenna: v B => traverse velocity s L => read zone length of the transponder in the antenna t Z = cycle time of the RFID complex. The read zone length of a transponder in the antenna depends on the transponder, the reader and its transmission and reception parameters, on the distance to the antenna and the orientation of the transponder. These data should be measured manually in a test configuration for each required transponder orientation. Near a single loop antenna and with the transponder oriented parallel to the antenna conductor, the read zone length of the antenna corresponds to the spacing of the antenna conductors in the loop. For an ID ISC.ANT800/600 antenna mounted horizontally, this is approx m. FEIG ELECTRONIC GmbH Page 12 of 30 N e-ID-B.doc

13 Fig. 4: Read zone length of the ID ISC.ANT800/600 antenna, transponder parallel to antenna s l S L = 0.8 m t Z = 0.33 s (from Example 1) The maximum permissible traverse velocity is thus: v B Max = s L / t Z = 0.8 m / 0.33 s = 2.42 m/s (8.7 km/h) FEIG ELECTRONIC GmbH Page 13 of 30 N e-ID-B.doc

14 4. Required components To configure an application with n RFID systems you will need: Qty. n ID ISC.LR2500 or ID ISC.LRM2500 Firmware Version RFC V or higher Qty. n Complete antenna assemblies Qty. 1 Shielded, twisted-pair cable between the individual readers. Example: LiYCY (TP) 2x2x0,25 mm 2 Components needed for starting up: Service software ISOStart 2012 higher on a PC running under Windows. FEIG ELECTRONIC GmbH Page 14 of 30 N e-ID-B.doc

15 5. Possible disturbances caused by mutual interference of the RFID systems There are three main causes of mutual interference between the RFID systems: Direct affects on the systems caused by strong coupling between the antennas. Carrier signal effects caused by mutual interference s. Artifacts in the receiver caused by the modulation pulses of the adjacent system. Which disturbances are measurable in the systems depends on the distance between the antennas, the antenna geometry, the output power and the orientation of the 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 installed between the systems. See 5.1. Minimum separations between two RFID systems Taking into consideration the power-up and power-down times, all readers must be turned off for a brief time (approx ms). If the systems are spaced between 5 m and 10 m apart, it may be sufficient to synchronize only the transmission protocols instead of turning the transmitter on and off. This speeds up the process somewhat, since the pauses between the systems are eliminated. The physical configuration, wiring, connection to the host and the settings in the reader are all identical except for the setting in configuration block Operating Mode. Here the RF OFF Condition bit is not set. FEIG ELECTRONIC GmbH Page 15 of 30 N e-ID-B.doc

16 5.1. Minimum separations between two RFID systems If multiple antennas are installed in a room or building, they can interfere with each other. This reduces the read range and reliability of the systems. A minimum separation of 8 10 m between the antennas should be allowed for. If lesser distances are necessary, mutual interference can be minimized by means of synchronizing and shielding. Synchronizing is performed several times a second, so that the user of a personnel gate is scarcely aware of it. When synchronizing the HF field the reader only enables the RF when a protocol is sent and a reply from the transponder is pending. In other words, the gates are not continuously on but rather are cycled on and off. When synchronizing 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 protocols with the transponder. For separations of 1 m - 2 m you must install additional shielding. This metal shield should be located in the middle between the gates, parallel to the antennas, and should be at least as large as the antennas excluding the housing. Table 1 Minimum separations between the gates resp. systems Antenna / gate / system configuration Setting in the Reader CFG11 field: Synchronization Minimum separations between the antennas or systems RW cm RW cm Two systems with no synchronization OFF 8 m 10 m Synchronizing of the transmission protocols Synchronizing of the HF field Synchronizing of the HF field, shield between the systems RW : Read range for the antenna Cascaded, RF stays on, Master/Slave Cascaded, RF switched off, Master/Slave Cascaded, RF switched off, Master/Slave 5 m 6 m 2 m 2.8 m 1 m 1.30 m FEIG ELECTRONIC GmbH Page 16 of 30 N e-ID-B.doc

17 Fig. 5: Position and size of the shield, configuration using two ID ISC.ANT800/600 antennas Shield 2 x ID ISC.ANT800/600 The shield should be installed in the middle between the two systems/antenna assemblies Fig. 6: Position and size of the shield. Configuration: Two gates with ID ISC.ANT1700/740 antennas Metal Shield 0,5m 0,5m FEIG ELECTRONIC GmbH Page 17 of 30 N e-ID-B.doc

18 6. System structure 6.1. Wiring the digital Inputs and Outputs (Reader multiplexing) Wiring the digital In/Outputs with 2 Readers To synchronize the readers using the digital synchronization port X2/ IN1 and OUT1, the digital output must be wired to the input of the next reader as shown in the diagram below. The power supply could be made by setting jumper J2 on the reader. Reader Connection to Reader to Description Master X2:PIN2, IN1+ - Master 24VDC By setting J2 Master X2:Pin7, - Master X2:Pin9, OUT1-E Ground Master X2:PIN1:, IN1- - Slave X2:Pin10, OUT1-C Master X2:PIN10:, OUT-C - Slave X2:Pin1, IN1- Master X2:Pin7, - Slave X2:Pin7, Ground Slave X2:Pin7, - Slave X2:Pin9, OUT1-E Ground Slave X2:PIN2, IN1+ - Slave 24VDC By setting J2 24V DC = J2 set 24V DC = J2 set IN1- OUT1-E OUT2-E REL1-COM REL2-COM REL3-COM IN1+ IN2+ IN3+ OUT1-C OUT2-C REL1-NO REL2-NO REL3-NO 24V X2 IN2- IN3- IN1- IN2- IN3- OUT1-E OUT2-E REL1-COM REL2-COM REL3-COM IN1+ IN2+ IN3+ OUT1-C OUT2-C REL1-NO REL2-NO REL3-NO 24V X2 1. Reader (Master) 2. Reader (Slave) Fig. 7: Wiring the digital Input/Output at 2 Readers An overview of the PIN connections of X2 will be shown in Fig. 10 The data line should be a shielded, twisted-pair cable. Example: LiYCY (TP) 2x2x0,25 mm 2. FEIG ELECTRONIC GmbH Page 18 of 30 N e-ID-B.doc

19 Wiring the digital In/Outputs with 3 (4,5,6) Readers Reader Connection to Reader to Description Master X2:PIN2, IN1+ - Master 24VDC By setting j2 Master X2:Pin7, - Master X2:Pin9, OUT1-E Ground Master X2:PIN10:, OUT-C - Slave1 X2:Pin1, IN1- Master X2:Pin7, - Slave1 X2:Pin7, Ground Slave1 X2:PIN2, IN1+ - Slave1 24VDC By setting J2 Slave1 X2:Pin7, - Slave1 X2:Pin9, OUT1-E Ground Slave1 X2:PIN10:, OUT-C - Slave2 X2:Pin1, IN1- Slave1 X2:Pin7, - Slave2 X2:Pin7, Ground Slave2 X2:PIN2, IN1+ - Slave2 24VDC By setting J2 Slave2 X2:Pin7, - Slave2 X2:Pin9, OUT1-E Ground Slave2 X2:PIN10:, OUT-C - Master X2:Pin1, IN1-24V DC = J2 set 24V DC = J2 set 24V DC = J2 set IN1- OUT1-E OUT2-E REL1-COM REL2-COM REL3-COM IN1+ IN2+ IN3+ OUT1-C OUT2-C REL1-NO REL2-NO REL3-NO 24V X2 IN2- IN3- IN1- OUT1-E OUT2-E REL1-COM REL2-COM REL3-COM IN1+ IN2+ IN3+ OUT1-C OUT2-C REL1-NO REL2-NO REL3-NO 24V X2 IN2- IN3- IN1- IN2- IN3- OUT1-E OUT2-E REL1-COM REL2-COM REL3-COM IN1+ IN2+ IN3+ OUT1-C OUT2-C REL1-NO REL2-NO REL3-NO 24V X2 1. Reader (Master) 2. Reader (Slave) 3. Reader (Slave) Fig. 8: Wiring the digital Input/Output at 3 Readers An overview of the PIN connections of X2 will be shown in Fig. 10 The data line should be a shielded, twisted-pair cable. Example: LiYCY (TP) 2x2x0,25 mm 2. FEIG ELECTRONIC GmbH Page 19 of 30 N e-ID-B.doc

20 Set jumper J2 on each reader to provide 24VDC for the synchronization. Fig. 9: Position Jumper J2 on reader IN1 IN2 IN3 OUT1 OUT2 REL1 REL2 REL3 /24V Fig. 10: PIN-Configuration X2 FEIG ELECTRONIC GmbH Page 20 of 30 N e-ID-B.doc

21 6.2. Wiring the digital Inputs and Outputs (Reader Synchronization) Wiring the digital In/Outputs with 2 Readers To synchronize the readers using the digital synchronization port X2/ IN1 and OUT1, the digital output must be wired to the input of the next reader as shown in the diagram below. The Output Reader 1 /Master must be connected directly with the Input 1 of Reader 1, all other Readers/Slaves will be connected parallel. The power supply could be made by setting jumper J2. 24V DC = J2 set 24V DC = J2 set IN1- OUT1-E OUT2-E REL1-COM REL2-COM REL3-COM IN1+ IN2+ IN3+ OUT1-C OUT2-C REL1-NO REL2-NO REL3-NO 24V X2 IN2- IN3- IN1- IN2- IN3- OUT1-E OUT2-E REL1-COM REL2-COM REL3-COM IN1+ IN2+ IN3+ OUT1-C OUT2-C REL1-NO REL2-NO REL3-NO 24V X2 1. Reader (Master) 2. Reader (Slave) Fig. 11: Wiring the digital Inputs/Outputs with 2 readers Reader Connection to Reader to Description Master X2:PIN2, IN1+ - Master 24VDC By setting J2 Master X2:Pin7, - Master X2:Pin9, OUT1-E Ground Master X2:PIN1:, IN1- - Master X2:Pin10, OUT1-C Master X2:PIN10:, OUT-C - Slave X2:Pin1, IN1- Master X2:Pin7, - Slave X2:Pin7, Ground Slave X2:PIN2, IN1+ - Slave 24VDC By setting J2 An overview of the PIN connections of X2 will be shown in Fig. 10 The data line should be a shielded, twisted-pair cable. Example: LiYCY (TP) 2x2x0,25 mm 2. FEIG ELECTRONIC GmbH Page 21 of 30 N e-ID-B.doc

22 Wiring the digital In/Outputs with 3 or 4 Readers To synchronize 3-4 readers using the digital synchronization port X2/ IN1 and OUT1, the digital output must be wired to the input of the next reader as shown in the diagram below. The Output Reader 1 /Master must be connected directly with the Input 1 of Reader 1, all other Readers/Slaves will be connected parallel. To avoid an overload of Output 1 of Reader 1 /Master, its only possible to connect maximum 4 readers parallel. The power supply could be made by setting jumper J2. 24V DC = J2 set 24V DC = J2 set 24V DC = J2 set IN1- OUT1-E OUT2-E REL1-COM REL2-COM REL3-COM IN1+ IN2+ IN3+ OUT1-C OUT2-C REL1-NO REL2-NO REL3-NO 24V X2 IN2- IN3- IN1- OUT1-E OUT2-E REL1-COM REL2-COM REL3-COM IN1+ IN2+ IN3+ OUT1-C OUT2-C REL1-NO REL2-NO REL3-NO 24V X2 IN2- IN3- IN1- IN2- IN3- OUT1-E OUT2-E REL1-COM REL2-COM REL3-COM IN1+ IN2+ IN3+ OUT1-C OUT2-C REL1-NO REL2-NO REL3-NO 24V X2 1. Reader (Master) 2. Reader (Slave) 3. Reader (Slave) Bild 12: Verdrahtung der digitalen Ein-/Ausgänge bei 3 Readern Reader Connection to Reader to Description Master X2:PIN2, IN1+ - Master 24VDC By setting J2 Master X2:Pin7, - Master X2:Pin9, OUT1-E Ground Master X2:PIN1:, IN1- - Master X2:Pin10, OUT1-C Master X2:PIN10:, OUT-C - Slave1 X2:Pin1, IN1- Master X2:Pin7, - Slave1 X2:Pin7, Ground (optional) Slave1 X2:PIN2, IN1+ - Slave1 24VDC By setting J2 Slave1 X2:PIN1:, IN1- - Slave2 X2:Pin1, IN1- Slave1 X2:Pin7, - Slave2 X2:Pin7, Ground (optional) Slave2 X2:PIN2, IN1+ - Slave2 24VDC By setting J2 An overview of the PIN connections of X2 will be shown in Fig. 10 The data line should be a shielded, twisted-pair cable. Example: LiYCY (TP) 2x2x0,25 mm 2. FEIG ELECTRONIC GmbH Page 22 of 30 N e-ID-B.doc

23 6.3. Configuring the readers for synchronizing Before setting the readers for synchronizing, the antennas must be tuned and the reader must be configured. This is described in the installation guide for the antennas or in the application notes for special antenna configurations. Be sure that all other readers are turned off when the antennas on the first reader are tuned. Proceed analogously when tuning the other antennas. Synchronizing is only possible in Scan-, Notification and Buffered Read Mode! See System Manual Reader ID ISC.LR2500. The Buffered Read Mode (or Notification Mode) is the preferred operation mode for fast reading operations. In this modes, the tags are read at maximum speed and the information is stored in the ring buffer of the reader. Data set can be read by the host. The parameters for synchronizing are set in configuration block Operating Mode in the Synchronization field. In 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. Since the Master is always the first to communicate with the transponder after a reset. There can be only one Master. All other readers are Slaves. In this example we show how to configure the reader for synchronizing in Buffered Read Mode. Step Action Note 1 Start ISOStart Software Select Detect 2 FEIG ELECTRONIC GmbH Page 23 of 30 N e-ID-B.doc

24 Step Action Note Select Keep Configuration unchanged and exit Wizard and click on Exit Note: 3 This has to be done at each start of ISO-Start program otherwise the configuration of the reader will be changed by the wizard. Select Options => Program 4 Select Expert Mode and confirm with OK. 5 FEIG ELECTRONIC GmbH Page 24 of 30 N e-ID-B.doc

25 Step Action Note Select Logical View Select Configuration Configure reader as needed for the corresponding antenna / antennas or antenna gates. See corresponding manual of antenna. 1.case: reader multiplexing Select Operating Mode -Set Buffered Read Mode -Enable Synchronization -Set Master for first reader, all other reader set Slave -Set RF OFF Condition 9a -Set Synchronization Timeout as calculated. here: 1000x1ms FEIG ELECTRONIC GmbH Page 25 of 30 N e-ID-B.doc

26 Step Action Note 2. case reader synchronization Select Operating Mode -Set Buffered Read Mode -Enable Synchronization 9b -Set Master for first reader, all other reader set Slave -Set RF OFF Condition -Set Synchronisation Timeout Master: 0 x 1 ms Slave: 500 x 1 ms 10 Confirm with Apply After all readers are switched on and configured to synchronization you can measure the synchronizing sequence If the synchronization is working properly there should be no red LED switched on at the reader and the reader command Reader Diagnostic should show Sync... OK. FEIG ELECTRONIC GmbH Page 26 of 30 N e-ID-B.doc

27 Fig. 13: Measuring setup: Checking synchronization sequence Power Supply 24 V DC Host RS485 Data cable Reader 1 Reader 2 The measuring 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 6.3. Configuring the readers for synchronizing Wiring is described in these sections: 6.1. Wiring the digital Inputs and Outputs (Reader multiplexing) Set the oscilloscope as follows: TimeBase: 50 ms/div Oscilloscope Amplitude: Channels 1+2: 2V/DIV Trigger: Automatic FEIG ELECTRONIC GmbH Page 27 of 30 N e-ID-B.doc

28 6.4. Requesting data from the reader In Buffered Read Mode the reader automatically carries out all necessary read commands as configured (Operating Mode). All data which the reader reads from the transponders are saved in a ring buffer. This buffer can hold a maximum of 100 entries. The data remain in the buffer until they are 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 Data Buffer Info). If the reader responds with the data, receipt of the data must be acknowledged using protocol 0x32 (Clear Data Buffer). Then the sent data are deleted from the ring buffer (see System Manual for ID ISC.LR2500). Fig. 14: Requesting data from the reader Request data FF FF Data Returned OK (Status 0x00) F D E C... Clear Buffer FF EC 60 Cmd OK (Status 0x00) FEIG ELECTRONIC GmbH Page 28 of 30 N e-ID-B.doc

29 Appendix A: Helpful tools for constructing and testing the antennas The following equipment is recommended for tuning, troubleshooting and commissioning the antennas: Laptop or personal computer (PC) running under Microsoft Windows. Service software ISOStart channel oscilloscope, sweep rate at least 10ns/Div or analog bandwidth of 100 MHz. Qty. 2 test loops 2.5 m long (consisting of 50 Ohm, RG58 cable with BNC plug and wire loop (diameter approx. 75 mm [3.0 in]) at the other end (generally self-assembled). ø 75 centre conductor screen BNC-plug, male RG58 cable 2.5 m FEIG ELECTRONIC GmbH Page 29 of 30 N e-ID-B.doc

30 Recommended equipment and possible sources: 1. Oscilloscope Tektronix TDS 210 or a model from the TDS2xx or TDS3xx. series Agilent 54622D or a model from the 546xx series Voltcraft 100 MHz- Oscilloscope 6100 Vendors: Tektronix Inc, oder Agilent Technologies, Conrad Electronic GmbH, Hirschau, ELV Elektronik AG Leer, oder DataTec GmbH, Reutlingen, 2. EMC ferrite toroid cores Diameter da=28, di=16, I=20, B.Nr Diameter da=40,6 di=27,4 I=15, B.Nr Vendor Würth Elektronik GmbH & Co.KG Riedenstraße Kupferzell Tel.: / oder FEIG ELECTRONIC GmbH Page 30 of 30 N e-ID-B.doc