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Escort LRP2000 97 , 6.5.6 ABxF Command 0DH: Start/Stop Continuous Read

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RFID Communications

97 LRP2000 Passive Reader/Writer

Example

Checks for an RFID tag within range of the antenna. A timeout of 2 seconds (07D0H = 2000 x 1 ms

increments) is set for the completion of the Tag Search.

6.5.6 ABxF Command 0DH: Start/Stop Continuous Read

DESCRIPTION

Command 0DH sends reads continuously to any tag in range of the antenna. When a tag enters the RF

field, it is read and the data passed to the host computer. The controller continues to read the tag, but will

not send the same data to the host until the tag has been outside the RF field for a specified time period.

This Delay Between Identical Decodes parameter prevents redundant data transmissions when the

controller is in Continuous Read mode.

DISCUSSION

The Start/Stop Continuous Read command contains three parameters: Start Address, Number of Bytes,

and Delay Between Duplicate Decodes. The read length parameter switches the mode. Any valid, non-

zero length will set the controller into Continuous Read mode. A read length value of 00H stops the

Continuous read. The Delay Between Identical Decodes parameter can have a value of 0 to 60 seconds.

When the Delay Between Identical Decodes is set to 0, the controller continuously reads and transmits tag

data to the host. This can flood the buffers and cause communication errors and data loss. If the controller

receives other commands from the host, it executes them and then resumes Continuous Read mode.

Issuing the command with the Number of Bytes set to 00H stops the Continuous Read.

The command is formatted as follows:

Command from Host Response from Controller

Field Content Field Content

Header 0202H Header 0202H

Command Size 0003H Response Size 0001H

Command Code 08H Comma nd Echo 08H

Timeout 07D0H Checksum F6H

Checksum 1DH Terminators 03H

Terminators 03H

Field Content

Header 0202H

Command Size Command length in bytes excluding the header, command size, checksum, and

terminator bytes.

Command 0DH

Start Address 2-byte value for the start address in the tag

Number of Bytes 2-byte value of the number of bytes to be addressed.

Delay Between Duplicate Decodes Delay value given in 1 second units

Checksum Optional checksum

Terminator 03H

Contents

Main Escort Memory Systems Warranty Table of Contents Chapter 1 Introduction Chapter 2 Installation and Guidelines Chapter 3 Electrical Interface Chapter 4 Communications Interface ii Chapter 6 RFID Communications Page 1 1 Introduction 1.1 Introduction 1.2 Unpacking and Inspection 1.3 FCC Compliance Page Page Page Page Page Page Page Page 11 2.2 Installation 2.2.1 LRP2000-26 Antenna Assembly Page 13 Page Page Page 17 3.2 Antenna Cabling Page Page 21 3.3 Data Terminal Blocks Page 23 3.4 Power Supply Wiring Page Page 3.8 Digital I/O Circuitry 27 3.8.1 Inputs 3.8.2 Outputs Electrical Interface 29 Figure 23: J20 Output Connector Table 5: Output Connector Pinout Page Page Page 33 3.9 Master/Slave Configuration 3.9.1 Setting Jumper 32 on the Master 35 3.9.2 DIP Switch Settings on the Slave 3.9.3 Setting Jumper J16 on the Slave 37 4 Communications Interface 4.1 Configuring the Serial Interface 4.1.1 COM1 4.1.2 COM2 Page 39 4.1.3 Digital Board DIP Switch 4.2 Optional Ethernet Interface 4.3 Configuring the Ethernet Module for Network Communication Page Page 43 4.4 LED Indicators Communications Interface LRP2000 Passive Reader/Writer 44 Figure 39: LED Indicators Table 13: LED Indicators 45 Page 5 Menu Configuration 5.1 How to Enter the Menu Configuration 5.2 Set-Up Operating Parameters 5.2.1 Set COM1 Parameters 5.2.2 Set COM2 Parameters 49 5.2.3 Set Operating Mode Page 51 5.2.4 Set RF Communication 5.2.5 Restore Factory Defaults 5.2.6 Return to Main Menu 53 5.3 Download New Program 5.4 Downloading DSP Firmware 5.5 Exit to Operating Mode 6 RFID Communications 6.1 Introduction LRP2000 Passive Reader/Writer 56 6.1.1 ABx Command Set Listings Table14, Table 15, and Table 16 list the ABx commands recognized by the LRP2000. NOTE: The delay between the characters of a command sent to the controller cannot be longer than 200 ms. Table 14: Single Tag Commands 6.2 Command Parameters 6.2.1 Command Timeout 6.2.2 Delay Between Duplicate Decodes 6.3 Multi-tag Command Parameters 6.3.1 Tag Repeat Count 6.3.3 Start Continuous Read 59 6.4 Standard ABx Protocol Table 18: Multi-tag Example 6.4.1 ABxS Command 04H: Fill Tag 61 6.4.2 ABxS Command 05H: Read 6.4.3 ABxS Command 06H: Write 63 6.4.4 ABxS Command 07H: Read Tag Serial Number 6.4.5 ABxS Command 08H: Tag Search 6.4.6 ABxS Command 0DH: Stop/Start Continuous Read 65 6.4.7 ABxS Command 14H: Get Memory Status 67 6.4.8 ABxS Command 16H: Write Family Code 6.4.9 ABxS Command 17H: Lock Family Code 6.4.10 ABxS Command 82H: SN Read All 69 6.4.11 ABxS Command 83H: Start/Stop Continuous SN Read All 71 6.4.12 ABxS Command 84H: Fill Tag All 73 6.4.13 ABxS Command 85H: Read All LRP2000 Passive Reader/Writer 74 75 6.4.14 ABxS Command 86H: Write All 6.4.15 ABxS Command 87H: Read Tag SN All 77 6.4.16 ABxS Command 88H: Tag Search All 6.4.17 ABxS Command 8BH: Write Family Code All 79 6.4.18 ABxS Command 8CH: Lock Family Code All 6.4.19 ABxS Command 8DH: Start/Stop Continuous Read All 81 6.4.20 ABxS Command 91H: Memory Lock All 83 6.4.21 ABxS Command 94H: SN Fill Page 85 6.4.22 ABxS Command 95H: SN Read 6.4.23 ABxS Command 96H: SN Write 87 6.4.24 ABxS Command 10H: Set Output 89 6.4.25 ABxS Command 11H: Input Status 6.5 ABx Fast Protocol 91 6.5.1 ABxF Command 04H: Fill Tag 93 6.5.2 ABxF Command 05H: Read 6.5.3 ABxF Command 06H: Write 95 6.5.4 ABxF Command 07H: Read Tag Serial Number 6.5.5 ABxF Command 08H: Tag Search 97 6.5.6 ABxF Command 0DH: Start/Stop Continuous Read 6.5.7 ABxF Command 14H: Get Memory Status 99 6.5.8 ABxF Command 16H: Write Family Code This example change the family code of the tag to 00H. DESCRIPTION Command 16H changes the family code of an RFID tag. 6.5.9 ABxF Command 17H: Lock Family Code 6.5.10 ABxF Command 82H: Read Data and SN All 101 LRP2000 Passive Reader/Writer 102 103 6.5.11 ABxF Command 83H: Start/Stop Continuous SN Read All Page 105 Response from controller 6.5.12 ABxF Command 84H: Fill All 107 6.5.13 ABxF Command 85H: Block Read All LRP2000 Passive Reader/Writer 108 109 6.5.14 ABxF Command 86H: Block Write All 6.5.15 ABxF Command 87H: Read Tag SN All 111 6.5.16 ABxF Command 88H: Tag Search All 113 6.5.17 ABxF Command 8DH: Stop/Start Continuous Read All 6.5.18 ABxF Command 91H: Memory Lock All 115 6.5.19 ABxF Command 8BH: Write Family Code All 6.5.20 ABxF Command 8CH: Lock Family Code All 117 6.5.21 ABxF Command 94H: SN Fill LRP2000 Passive Reader/Writer 118 This example fills the tag with serial number 1DB0320000104E0 with FFH. 119 6.5.22 ABxF Command 95H: SN Block Read LRP2000 Passive Reader/Writer 120 121 6.5.23 ABxF Command 96H: SN Block Write LRP2000 Passive Reader/Writer 122 This example writes 4 bytes to the tag with serial number 1DB0320000104E0 starting at address 0AH. 123 6.5.24 ABxF Command 10H: Set Output 6.5.25 ABxF Command 11H: Input Status 125 The following example shows only input B is ON, and A, C, and D are OFF. 6.6 ABx ASCII Protocol 6.6.1 ABx ASCII Protocol Command Structure 6.6.2 ABx ASCII Protocol Response Structure 127 LRP2000 Passive Reader/Writer 128 129 6.7 ABx Error Codes 6.7.1 Multi-tag Error Codes 6.7.2 ABx Standard Error Codes 6.7.3 ABx Fast Error Codes 6.7.4 ABx ASCII Error Codes 131 6.7.5 Multi-tag Command Error Code 132 Appendix A Specifications A.1 Electrical A.2 Communication A.3 Mechanical Specifications A.4 Environmental Appendix B Models and Accessories B.1 Available Models B.2 Options B.3 Accessories B.4 Tags 134 Appendix C ASCII Chart ASCII Chart 135