Specifications

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FL-MDS-CAB.2

MOD-MDS.1 ***Confidential*** 1 of 28

MODULE DESIGN SPECIFICATION

CANopen Antenna Board

AUTHOR & REVISION HISTORY

Version

Author

Change Description

Adriano Melis

First version

Adriano Melis

Added statements for FCC and ISED

DOCUMENT APPROVAL

Function

Name

Signature and Date

FW Modules & Platform

Manager

Walter Ruzzarin

Contents

Contents .......................................................................................................................................................1

1 DEFINITIONS AND ACRONYMS, REFERENCES ........................................................................................2

2 OVERVIEW .............................................................................................................................................3

3 ARCHITECTURE ......................................................................................................................................3

3.1 Performance requirements ...........................................................................................................5

4 INTERFACES ...........................................................................................................................................7

5 RELEVANT USE CASES ............................................................................................................................7

5.1 Automatic board version detection...............................................................................................7

5.2 On-the-fly RFId tag reading (both versions)...................................................................................7

5.3 Static RFId reading of two carriers tag Ids (double antenna version)............................................7

5.4 Firmware update ...........................................................................................................................8

5.5 HTRC110 tag reader configuration ................................................................................................8

6 DESIGN SPECIFICATIONS REFERENCE – MECHANICAL AND ELECTRICAL ...............................................8

6.1 CAB mechanical specification ........................................................................................................8

6.2 Single antenna electrical specs ....................................................................................................10

il 14/11/2019 alle 15:22:43 CET

Firmato da Walter Ruzzarin

Summary of content (28 pages)

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FL-MDS-CAB.2 MODULE DESIGN SPECIFICATION CANopen Antenna Board AUTHOR & REVISION HISTORY Version Author Change Description 1 Adriano Melis First version 2 Adriano Melis Added statements for FCC and ISED DOCUMENT APPROVAL Function FW Modules & Platform Manager Name Signature and Date Walter Ruzzarin Firmato da Walter Ruzzarin il 14/11/2019 alle 15:22:43 CET Contents Contents .........................................................................................................................
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FL-MDS-CAB.2 6.3 7 Double antenna electrical specs ..................................................................................................10 DESIGN SPECIFICATIONS REFERENCE – FIRMWARE ............................................................................11 7.1 7.2 FW structure ................................................................................................................................12 Tag encoding.......................................................................
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FL-MDS-CAB.2 Name CANopen HITAG RFId HTRC110 PCB PDO RFId SDO STM32L462CEU6 TLA UART Definition/description A communication protocol and device profile specification. Based on the CAN data link protocol and physical layer. A family of devices and tags by NXP semiconductors for low frequency RFId (125 kHz) The HITAG RFId reader chip used in the CAB Printed Circuit Board Process Data Object Radio Frequency identification.
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FL-MDS-CAB.2      transceiver chip. The MCU is connected to an ASTMLPA-16.000MHz standard clock oscillator for precise clock reference. CAN transceiver – it provides the physical interface between the MCU CAN controller and the physical CAN 2-wire bus. HTRC110 HITAG reader chip by NXP. It drives the connected antenna to power the RFId tag, receives the tag contents signal and sends to the CPU the digitized signal to be decoded.
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FL-MDS-CAB.2 Antenna A Power supply UART port Debug port STM32 Cortex-M MCU CAN transceiver HITAG RFId reader status LED Antenna select circuit CAN id + termination resistor CAN bus I/O and bypass connector Antenna B 24V DC I/O and bypass connector Figure 2. Double antenna CAB schema 3.1 Performance requirements  The required maximum read failure rate for PCF7931 tags is 0.3 PPM (3 failed reads every 107) for both CAB versions.
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FL-MDS-CAB.2 Carrier C Carrier A on Antenna A Carrier B on Antenna B Figure 3. Schematic layout of the static read test configuration, double antenna CAB mounted under the transport belt static read on-the-fly read Figure 4. Potentially critic layouts MOD-MDS.
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FL-MDS-CAB.2 4 INTERFACES The CAB has three hardware communication interfaces:    During normal operation the CAB communicates with other devices through the CAN port. The default bit rate is 500 kbit/s. The CAB MCU is programmed through the debug/programming port, which is accessed on the PCB with test points. The port is connected to through a customized testbed of nails during firmware development/debugging, and in production for factory programming.
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FL-MDS-CAB.2 4. activate antenna B with a RPDO1 message: the CAB will send two TPDO3s: the first one signaling antenna B is changing state, the second one signaling antenna B activation is complete. CAB then decodes the RFId tag and sends the carrier Id packed in a TPDO2 message; 5. deactivate antenna B with a RPDO1 message: a TPDO3 signaling antenna B deactivation is sent; 6. then CAB sends a TPDO2 signaling tag 1 Id is not “read” anymore. 5.
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FL-MDS-CAB.2 13. the plastic support has retention joint to ensure mechanical support between CABs and to prevent inverted array mounting Figure 5. 3D model of single antenna CAB Figure 6. 3D model of double antenna CAB MOD-MDS.
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FL-MDS-CAB.2 6.2 Single antenna electrical specs 1. Two identical retention connectors on the short edges of the TOP side, for CAN bus and 24 V power supply; the connector will be JST mod. SM07B-PASS-1 (smt 7 pole side entry type header); 2. The CAB system allows the cascading connection of up to 32 units connected through cabling length of maximum 6 m, providing full power supply and CAN bus connectivity; 3. The power supply to the CAB will be 24 V Dc ± 20% minus voltage drop on cabling.
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FL-MDS-CAB.2 2. Two identical Socket Strip connectors on the bottom side for CAN bus and power transfer between CABs in array configuration a. connectors are SAMTEC mod. MMS-107-02-F-SH (smt 7 poles socketstrip). 3. The connection between two CABs is made by a SAMTEC mod. MTMM-107-07-F-S-200 bridge (see fig. 5) 4. The CAB system allows the cascading connection of up to 32 units connected through cabling length of maximum 6 m, providing full power supply and CAN bus connectivity; 5.
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FL-MDS-CAB.2 Software Design Specifications - CANopen Antenna Board ID Text Components Project Name Notes CAB-32 CANopen Antenna Board shall decode carrier tags and rack tags NA CANopen Antenna Board N/A CAB-24 CAB FW shall implement PDOs extending SFD-XMOLA.01 description NA CANopen Antenna Board N/A CAB-20 Active Antenna FW shall extend OD entries described in SFD-XMOLA.
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FL-MDS-CAB.
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FL-MDS-CAB.2 1 1 1 1 0 1 0 1 1 0 1 0 0 0 1 two half-zero-bits (0) full-one-bit (1) Figure 7. a portion of the signal from HTRC110 to the MCU which carries the tag content and the corresponding encoding 7.4 CANopen implementation The CAB firmware application implements a CANopen slave device according to CiA 301.
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FL-MDS-CAB.
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FL-MDS-CAB.2 B0 B1 B2 B3 Carrier Id read on Antenna B LSB … … MSB B4 B5 B6 B7 Presence on AB CRC Error/warning byte 0 Error/warning byte 1 1/0 CRC value LSB MSB 7.5.2.
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FL-MDS-CAB.2 b7 Antennas status b4 b3 b6 b5 Antenna B status b2 b1 Antenna A status b0 Possible antenna information nibble values:    0b0000 – Antenna is changing state (calibration is in progress, switching on/off is in progress, etc.) 0b0001 – Antenna off 0b0010 – Antenna on Status byte examples:     Byte 1 = 0x11: both antennas are off Byte 1 = 0x21: antenna B on, antenna A off Byte 1 = 0x22: impossible (both antennas active) Byte 1 = 0x10: antenna A is changing state, antenna B is off 7.
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FL-MDS-CAB.2 7.7 Example PDO sequences For normal usage the CAB starts with optimal default parameters. No calibration is needed unless in a peculiar environment. A request for antenna activation will be denied if one of the antennas is already active. 7.7.1 Continuous read on Antenna A The antennas are assumed to be inactive. A single RPDO1 starts continuous reading: 1. 2. 3.
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FL-MDS-CAB.2 Figure 8. Sequence diagram of AA activation and tag read 7.7.2 Calibration and continuous reading on antenna A Two RPDO1 are needed: one to deactivate the antennas, one to start calibration and continuous reading. A carrier must be positioned centered above the antenna, otherwise the calibration will fail, finding a wrong sampling time value, and possibly making the tag decoding impossible without a new, correct calibration. 1. 2. 3. 4.
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FL-MDS-CAB.2 5. 6. TPDO1 tag read [0xC9 0xC7 0x05 0x44 0x01 0xC0 0x00 0x00] is sent just after the calibration is completed (a tag is on the antenna); TPDO1 tag passed [0xC9 0xC7 0x05 0x44 0x00 0xC0 0x00 0x00] is sent when the tag leaves the antenna. Remark: a TPDO3 with status “antenna activated” (0x12 or 0x21) after a calibration command implies a successful calibration procedure. Figure 9. Calibration sequence diagram 7.7.
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FL-MDS-CAB.2 7.8 Object Dictionary The Relevant sections of the Object Dictionary of CAB are outlined in the following tables Standard Communication Parameters Index Subindex Name Type Access 0x1008 1 Manufacturer Device VISIBLE_STRING RO Name 0x1009 1 Manufacturer hardware VISIBLE_STRING RO version 0x100A 1 Manufacturer software VISIBLE_STRING RO version Index Subindex 0x5000 1 0x5000 2 0x5000 3 0x5000 4 0x5000 5 0x5000 6 0x5000 7 0x5000 8 0x5000 9 0x5000 10 E.g. "Rev02" E.g.
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FL-MDS-CAB.2 0x2001 3 0x2001 4 0x2001 5 status_ AB_crc status_ AB_error status_ AB_counter UNSIGNED8 RO UNSIGNED16 RO UNSIGNED64 RW latest CRC on AB (0 if rack tag) latest error code AB number of decoded Ids on AB Note: on the single antenna version the AB entries will contain always zeroes.
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FL-MDS-CAB.2 accumulation window by te 0 b yt e 1 moving window Figure 10. portion of tag signal illustrating the two decoding windows 4.
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FL-MDS-CAB.
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FL-MDS-CAB.
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FL-MDS-CAB.2 used as follows: uint8_t payload[6]; crcReset(); for (i=0; i<5; i++) crcGenByte(payload[i]); // to be compared to B10 == payload[5] 8.2 CRC2 computation CRC2 computing is implemented by the crc2() C function.
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FL-MDS-CAB.2 9 FCC and ISED statements 9.1 Warnings This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: 1. This device may not cause harmful interference, and 2. this device must accept any interference received, including interference that may cause undesired operation. 9.2 Information to the user statements This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules.
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FL-MDS-CAB.2 9.4 RF Radiation Exposure statement This product complies with FCC and ISED radiation exposure limits set forth for an uncontrolled environment. The antenna should be installed and operated with minimum distance of 20 cm between the radiator and your body. Cet appareil est conforme aux limites d'exposition aux rayonnements de l’ISED pour un environnement non contrôlé.