ABxS Command 8DH Start/Stop Continuous Read All | Escort LRP2000

RFID Communications

6.4.19 ABxS Command 8DH: Start/Stop Continuous Read All

DESCRIPTION

Command 8DH starts and stops Continuous Read All mode for multiple tags.

DISCUSSION

The Start/Stop Continuous Read All mode is set by the length byte. To start Continuous Read All mode, send the command with valid, non-zero value for the length of the read. Stop the mode by sending the command with a read length of 0. While in this mode, any other command can be issued and will be handled properly. After processing the new command, the controller resumes the Continuous Read All mode. The command has a parameter, Repeat Count, that can prevent multiple reads of the same tag. A tag is not read a second time until a specified number of tags have been read since it was last read. Allowed values are from 0 to 255 (FFH), where 0 means the tag can be re-read anytime. When Continuous Read All mode is interrupted with other commands, the Repeat Count is saved during execution of the other commands, such that all tags respond to the interrupting command. When the controller resumes continuous reading, the Repeat Count is restored. The controller responds with an acknowledge packet followed by data packets for each tag read. The CONFIG LED blinks after each packet transmission.

Field	Remarks
Command	Command number in hex preceded by AAH

Family ID	Tag Family ID - 00H = all tags

Reserved	00H

Start Address	Tag address for the start of the read

Read Length	Nonzero = start, 0000H = stop

Repeat Count	Number of tag that must be read before the same tag will be read again (0-255)

Message Terminator	FFFFH

Example

Reads 4 bytes of data from the tag starting at address 0001H. The Family ID byte is set to zero so all tags will be read. The Tag Repeat Count is set to 20 (14H). Three tags respond with read data.

Command from Host

MSB	LSB	Remarks
AAH	8DH	Perform Command 8D

00H	00H	Tag Family 00/Reserved

00H	01H	Start Address

00H	04H	Read Length

00H	14H	Repeat Count

FFH	FFH	Message Terminator

Response from Controller

MSB	LSB	Remarks
AAH	8DH	Command Echo

FFH	FFH	Message Terminator

LRP2000 Passive Reader/Writer

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Image 85

Escort LRP2000 manual ABxS Command 8DH Start/Stop Continuous Read All, AAH 8DH

Contents

LRP2000 Passive Reader/Writer Escort Memory Systems Warranty Table of Contents Rfid Communications Iii Unpacking and Inspection Introduction FCC Compliance FCC Certifications Introduction CE Certification CE Statement Changes and Modifications LRP2000 Dimensions Dimensions LRP2000 Mounting Hole Locations and Dimensions LRP2000-23 Antenna Dimensions LRP2000-26 Antenna Dimensions 1 LRP2000-26 Antenna Assembly InstallationInstalling the Antenna Antenna Environment Green Orientation Dots Location Green Dots Joining Plate Connectors Joining Plate Joining Plate and Fasteners Completed LRP2000-26 Antenna RF Connectors and Strain Relief Connectors and Wiring Internal Connectors Terminal Blocks Antenna Cabling Antenna Connectors Single Antenna System Connections Connecting Single Antenna System Dual Antenna System Connections Connecting a Dual Antenna System Data Terminal Blocks J8 Pin Number Interface J8 Signal Name DB9 Pin DB25 PinRS232 Pinouts, J8 Terminal Block J10 COM1 RS422 Input Power Pinout Power Supply WiringJ10 Pin Number Signal Name Polarity Description Power Supply LRP2000 Wire color Connector Pin Number Input Power Supply Lugs Ethernet Wiring RS232 Wiring RS422 Wiring and Termination Digital I/O Circuitry Inputs Connector Pin Signal Name Polarity Number Outputs Terminal Signal Name Polarity Number Input from Sourcing Contact Input from NPN Sensor Sourcing Output Contact Sinking Output LED Driver Setting Jumper 32 on the Master Master/Slave ConfigurationJ32 J34 Master DIP Switch Settings DIP Switch Settings on the SlaveBank Position OFF Slave DIP Switch Settings Setting Jumper J16 on the Slave COM1 Defaults Configuring the Serial Interface1 COM1 2 COM2 COM2 Parameters COM2 DefaultsBaud Rate 1200, 2400 9600, 19200 bps Dip Switch Settings Digital Board DIP SwitchDownload Baud Rate Interface Restore Defaults Settings Default IP Address Configuring the Ethernet Module for Network CommunicationOptional Ethernet Interface Ignored Menu Loading Configuration Server Properties LED Indicators Color Meaning Error LED 4 Flashes Flashing LED SignalsError and Config LEDs 4 Simultaneous Flashes Error and Config LEDs 4 Alternating Flashes Faulty Network Connection No Dhcp Response Received LRP2000 Standard PC Serial Port How to Enter the Menu Configuration Set COM1 Parameters Set-Up Operating ParametersSet COM2 Parameters Operating Mode Set Operating ModeFraming Editing Checksum? 0 Disabled 1 Enabled Delay Between Identical Decodes Power up in Continuous Read Mode?Start Address Length Set RF Communication Restore Factory DefaultsReturn to Main Menu Downloading DSP Firmware Download New Program Exit to Operating Mode Conventions Command protocols Single Tag Commands ABx Command Set ListingsMulti-tag Commands User I/O Commands Multi-tag Command Parameters Command Parameters Start Continuous Read Standard ABx Protocol Field Number Content BytesSingle Tag Example Multi-tag Example Command from Host ABxS Command 04H Fill TagExample Field Remarks Response from Controller ABxS Command 05H Read ABxS Command 06H Write ACH ABxS Command 07H Read Tag Serial NumberE0H ABxS Command 0DH Stop/Start Continuous Read ABxS Command 08H Tag Search Command Response Field Remarks Config BlinkBehavior Description ANT Field Content ABxS Command 14H Get Memory StatusResponse from controller ABxS Command 17H Lock Family Code ABxS Command 16H Write Family CodeDescription ABxS Command 82H SN Read All AAH FFH 6CH 1EH ABxS Command 83H Start/Stop Continuous SN Read All0BH C5H 4BHFCH Response to a successful command follows this form ABxS Command 84H Fill Tag All ABxS Command 85H Read All Termination Packet ABxS Command 86H Write All 6EH ABxS Command 87H Read Tag SN All3CH D2H ABxS Command 88H Tag Search All AAH 8BH ABxS Command 8BH Write Family Code All AAH 8CH ABxS Command 8CH Lock Family Code All AAH 8DH ABxS Command 8DH Start/Stop Continuous Read All Data response from controller Command is formatted as shown below ABxS Command 91H Memory Lock All ABxS Command 94H SN Fill 00H 01H SN byte ABH ABxS Command 95H SN ReadF3H ABxS Command 96H SN Write A4H Remarks LSB Bit Output D Output C Output B Output a ABxS Command 10H Set Output0CH 0EH Remarks LSB Bit Input D Input C Input B Input a ABxS Command 11H Input Status ABx Fast Protocol Field ContentsPacket Size Checksum ABx Fast Multi-tag Command Structure ABx Fast Single Tag Command Structure Header 0202H Command Size ABxF Command 04H Fill Tag Command from Host Field Content ABxF Command 05H ReadResponse from Controller Field Content AEH E7H ABxF Command 06H Write EEH ABxF Command 07H Read Tag Serial NumberF8H F2H ABxF Command 08H Tag SearchA3H 1DH ABxF Command 0DH Start/Stop Continuous ReadF6H E1H ABxF Command 14H Get Memory StatusF1H E5H ABxF Command 16H Write Family CodeE8H ABxF Command 82H Read Data and SN All ABxF Command 17H Lock Family Code A6H 101 6FH Command from Host Response from Controller Field Content 103 ABxF Command 83H Start/Stop Continuous SN Read All 7BH 6AH 105 106 ABxF Command 84H Fill All 107 ABxF Command 85H Block Read All C8H EBH 109 ABxF Command 86H Block Write All 110 ABxF Command 87H Read Tag SN All F4H 9BH ETX ABxF Command 88H Tag Search All 113 ABxF Command 8DH Stop/Start Continuous Read All 114 ABxF Command 91H Memory Lock All 115 ABxF Command 8BH Write Family Code All F7H ABxF Command 8CH Lock Family Code All Response form Controller Field Content ABxF Command 94H SN Fill117 9DH B0H 119 ABxF Command 95H SN Block Read 120 121 ABxF Command 96H SN Block Write 4DH 123 ABxF Command 10H Set OutputOutput LSB Bit Status Output D Output C Output B Output a Byte 124 ABxF Command 11H Input Status EDH 125EAH Command Packet Structure ABx Ascii Protocol Command StructureABx Ascii Protocol ABx Ascii Protocol Response Structure Example Ascii Command, Fill Tag Command/Response Size127 STX Command from Host Field Ascii Hex Ascii String ValueResponse from Controller Field Ascii Hex Ascii String Value Multi-tag Error Codes ABx Error CodesABx Standard Error Codes Error Code Description ABx Ascii Error Codes ABx Fast Error CodesField Bytes Contents Field Number of Ascii Contents Characters 131 Multi-tag Command Error Code Electrical Mechanical SpecificationsCommunication Environmental Available Models AccessoriesOptions Tags Decimal Hex Character 134 DEL 135