Escort LRP2000 manual ABxF Command 04H Fill Tag, Header 0202H Command Size

RFID Communications

6.5.1 ABxF Command 04H: Fill Tag

DESCRIPTION

Command 04H fills an RFID tag with a one-byte value over multiple contiguous addresses.

DISCUSSION

This command is commonly used to clear an RFID tag's memory. It writes a one-byte value repetitively across a specified range of tag addresses. The fill function requires one data value byte, a starting address, and a fill length. It fills the tag with the data value Byte, starting at the specified start address for the specified number of consecutive bytes. When Fill Length is set to 0, the controller writes fill data from the start address to the end of the tag's memory. The timeout value is given in 1 ms increments and can have a value of 1EH to FFFEH (65,534 ms). The controller returns a syntax error (error 21H) when the timeout is set to 0, and when the Fill Length extends beyond the last byte in the tag.

Field	Content
Header	0202H
Command Size	Packet length in Bytes excluding the header, command size, checksum, and terminator bytes. 0008H
	for this command.
Command	04H
Start Address	2-byte value for the starting tag address
Number of Bytes	2-byte value for the length of the fill in number of Bytes
Timeout	2-byte value for timeout in 1 ms units. (1EH - FFFEH) Bytes
Data Value Byte	1-byte value to be written to all the addressed Bytes
Checksum	Optional checksum
Terminator	03H

A response to a successful command follows this form:

Field	Content
Header	0202H
Command Size	Packet length in bytes excluding the header, command size, checksum, and terminator bytes.
Command Echo	04H
Checksum	Optional checksum
Terminator	03H

LRP2000 Passive Reader/Writer 92