TAGnology_TAGid -125kHz_Protocol.pdf - RFID Webshop

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Communication Reader-Host Rev. 1.2 February 1999 3.11.2 Long Range: Anticollision Cycle In some applications it is necessary to get all Serial Numbers in the field in the shortest time possible. In this case we recommend to use the command HTS_GetSnrReset. This Command performs one UID Request, a Select and Halt or a Select_Quit and returns a Serial Number and information wether there are more transponder in the field or not (more). Long Range-Anticollision-Cycle START HTS_GetSnrReset (0x11, &snr, &more); while (!RWDEot); RWD Err 0 ? yes interpretation of errors no HTS_GetSnrReset (0x10, &snr, &more); while (!RWDEot); RWD Err 0 ? yes List completed? no Protokoll HTRM801 V1.2/C Page 80 (107)
February 1999 Rev. 1.2 Communication Reader-Host 3.11.3 Long Range: Anticollision Cycle In case of several transponders in the reading area of the read/write device the GetSnr command indicates this by the more byte. To select one of these transponders for following read or write operations an anticollision cycle must be executed as described in the following flow chart. Long Range-Anticollision-Cycle START HTS_GetSnrReset (0x11, &snr, &more); while (!RWDEot); GetSnr RWD RWDErr 0 < ? 0 ? yes interpretation of errors no HTS_GetSnrReset (0x10, &snr, while (!RWDEot); Select RWD RWDErr 0 < ? 0 ? yes interpretation of errors no Read or write page x, halt while (!RWDEot); Read/Write no RWD RWDErr 0 < ? 0 ? yes interpretation of errors Halt *) In case you want to access the same tags for several times. Page 81 (107) Protokoll HTRM801 V1.2/C
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TAGnology RFID GmbH | Grazer Vorsta
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TAGnology_TAGid -125kHz_Protocol.pdf - RFID Webshop

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