ABxF Command 0DH Start/Stop Continuous Read, 1DH | Escort LRP2000

RFID Communications

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.

Command from Host

Field	Content
Header	0202H

Command Size	0003H

Command Code	08H

Timeout	07D0H

Checksum	1DH

Terminators	03H

Response from Controller

Field	Content
Header	0202H

Response Size	0001H

Command Echo	08H

Checksum	F6H

Terminators	03H

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:

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

97	LRP2000 Passive Reader/Writer

Image 102

Escort LRP2000 manual ABxF Command 0DH Start/Stop Continuous Read, 1DH, F6H

Contents

LRP2000 Passive Reader/Writer Escort Memory Systems Warranty Table of Contents Rfid Communications Iii Introduction Unpacking and Inspection FCC Compliance FCC Certifications Introduction CE Statement CE Certification Changes and Modifications Dimensions LRP2000 Dimensions LRP2000 Mounting Hole Locations and Dimensions LRP2000-23 Antenna Dimensions LRP2000-26 Antenna Dimensions Installing the Antenna Installation1 LRP2000-26 Antenna Assembly Antenna Environment Green Orientation Dots Location Connectors Joining Plate Green Dots Joining Plate Joining Plate and Fasteners Completed LRP2000-26 Antenna Connectors and Wiring RF Connectors and Strain Relief Internal Connectors Terminal Blocks Antenna Connectors Antenna Cabling Connecting Single Antenna System Single Antenna System Connections Connecting a Dual Antenna System Dual Antenna System Connections J8 Pin Number Interface J8 Signal Name DB9 Pin DB25 Pin Data Terminal BlocksRS232 Pinouts, J8 Terminal Block J10 COM1 RS422 J10 Pin Number Signal Name Polarity Description Power Supply WiringInput Power Pinout Power Supply LRP2000 Wire color Connector Pin Number Input Power Supply Lugs RS232 Wiring RS422 Wiring and Termination Ethernet Wiring Digital I/O Circuitry Connector Pin Signal Name Polarity Number Inputs Outputs Terminal Signal Name Polarity Number Input from Sourcing Contact Input from NPN Sensor Sourcing Output Contact Sinking Output LED Driver Master/Slave Configuration Setting Jumper 32 on the MasterJ32 J34 Bank Position DIP Switch Settings on the SlaveMaster DIP Switch Settings OFF Setting Jumper J16 on the Slave Slave DIP Switch Settings 1 COM1 Configuring the Serial InterfaceCOM1 Defaults 2 COM2 COM2 Defaults COM2 ParametersBaud Rate 1200, 2400 9600, 19200 bps Download Baud Rate Interface Restore Defaults Digital Board DIP SwitchDip Switch Settings Settings Optional Ethernet Interface Configuring the Ethernet Module for Network CommunicationDefault IP Address Ignored Menu Loading Configuration LED Indicators Server Properties Color Meaning Error and Config LEDs 4 Simultaneous Flashes Flashing LED SignalsError LED 4 Flashes Error and Config LEDs 4 Alternating Flashes Faulty Network Connection No Dhcp Response Received How to Enter the Menu Configuration LRP2000 Standard PC Serial Port Set-Up Operating Parameters Set COM1 ParametersSet COM2 Parameters Set Operating Mode Operating ModeFraming Editing Checksum? 0 Disabled 1 Enabled Start Address Power up in Continuous Read Mode?Delay Between Identical Decodes Length Restore Factory Defaults Set RF CommunicationReturn to Main Menu Download New Program Downloading DSP Firmware Exit to Operating Mode Command protocols Conventions Multi-tag Commands ABx Command Set ListingsSingle Tag Commands User I/O Commands Command Parameters Multi-tag Command Parameters Start Continuous Read Single Tag Example Field Number Content BytesStandard ABx Protocol Multi-tag Example Example ABxS Command 04H Fill TagCommand from Host Field Remarks ABxS Command 05H Read Response from Controller ABxS Command 06H Write ABxS Command 07H Read Tag Serial Number ACHE0H ABxS Command 08H Tag Search ABxS Command 0DH Stop/Start Continuous Read Behavior Description Config BlinkCommand Response Field Remarks ANT ABxS Command 14H Get Memory Status Field ContentResponse from controller ABxS Command 16H Write Family Code ABxS Command 17H Lock Family CodeDescription ABxS Command 82H SN Read All 6CH AAH FFH ABxS Command 83H Start/Stop Continuous SN Read All 1EH0BH 4BH C5HFCH ABxS Command 84H Fill Tag All Response to a successful command follows this form ABxS Command 85H Read All Termination Packet ABxS Command 86H Write All 3CH ABxS Command 87H Read Tag SN All6EH D2H ABxS Command 88H Tag Search All ABxS Command 8BH Write Family Code All AAH 8BH ABxS Command 8CH Lock Family Code All AAH 8CH ABxS Command 8DH Start/Stop Continuous Read All AAH 8DH Data response from controller ABxS Command 91H Memory Lock All Command is formatted as shown below ABxS Command 94H SN Fill 00H 01H SN byte ABxS Command 95H SN Read ABHF3H ABxS Command 96H SN Write A4H 0CH ABxS Command 10H Set OutputRemarks LSB Bit Output D Output C Output B Output a 0EH ABxS Command 11H Input Status Remarks LSB Bit Input D Input C Input B Input a Packet Size Field ContentsABx Fast Protocol Checksum ABx Fast Single Tag Command Structure ABx Fast Multi-tag Command Structure ABxF Command 04H Fill Tag Header 0202H Command Size Response from Controller Field Content ABxF Command 05H ReadCommand from Host Field Content AEH ABxF Command 06H Write E7H ABxF Command 07H Read Tag Serial Number EEHF8H ABxF Command 08H Tag Search F2HA3H ABxF Command 0DH Start/Stop Continuous Read 1DHF6H ABxF Command 14H Get Memory Status E1HF1H ABxF Command 16H Write Family Code E5HE8H ABxF Command 17H Lock Family Code ABxF Command 82H Read Data and SN All 101 A6H Command from Host Response from Controller Field Content 6FH ABxF Command 83H Start/Stop Continuous SN Read All 103 6AH 7BH 105 ABxF Command 84H Fill All 106 ABxF Command 85H Block Read All 107 EBH C8H ABxF Command 86H Block Write All 109 ABxF Command 87H Read Tag SN All 110 9BH F4H ABxF Command 88H Tag Search All ETX ABxF Command 8DH Stop/Start Continuous Read All 113 ABxF Command 91H Memory Lock All 114 ABxF Command 8BH Write Family Code All 115 ABxF Command 8CH Lock Family Code All F7H ABxF Command 94H SN Fill Response form Controller Field Content117 B0H 9DH ABxF Command 95H SN Block Read 119 120 ABxF Command 96H SN Block Write 121 4DH Output LSB Bit Status ABxF Command 10H Set Output123 Output D Output C Output B Output a Byte ABxF Command 11H Input Status 124 125 EDHEAH ABx Ascii Protocol ABx Ascii Protocol Command StructureCommand Packet Structure ABx Ascii Protocol Response Structure Command/Response Size Example Ascii Command, Fill Tag127 Command from Host Field Ascii Hex Ascii String Value STXResponse from Controller Field Ascii Hex Ascii String Value ABx Standard Error Codes ABx Error CodesMulti-tag Error Codes Error Code Description Field Bytes Contents ABx Fast Error CodesABx Ascii Error Codes Field Number of Ascii Contents Characters Multi-tag Command Error Code 131 Communication Mechanical SpecificationsElectrical Environmental Options AccessoriesAvailable Models Tags 134 Decimal Hex Character 135 DEL