Emsa HS500E manual M m a n d P a c k e t S t r u c t u r e Ta b l e, 06 +, Seconds

C H A P T E R 3 : R F I D C O M M A N D S

3 . 1 . 1		C o m m a n d P a c k e t S t r u c t u r e Ta b l e
	W o r d		M S B		L S B	D e s c r i p t i o n
	#
	01		00	06 (+		OVERALL LENGTH:
					number of	The first word in a command packet is the
					additional
						Overall Length. This 2-byte value indicates the
					data
						total number of words in the command (including
					words, if
						this - the Overall Length field). This value will
					any)
						always be at least six words (0x0006).
	02		AB	03		COMMAND ID:
						The second word contains the Command ID. For
						example: Write Data Command = 0xAB03
						See the Section 3.2.1 - RFID Command Table for
						a complete list.
	03		00	01		NODE ID:
						The third word contains the Node ID of the
						antenna / controller for which the command is
						directed. This value should always be 0x0001 for
						the HS500E.
	04		00	32		TIMEOUT VALUE:
						Word four in a command packet contains the 2-
						byte Timeout Value. This value sets the
						maximum length of time for which the HS500E
						will attempt to complete the given command. This
						“time limit” is measured in 1/10th (.10) second
						increments, where 0x0032 = 50 x .10 = 5
						seconds.
	05		00	01		START ADDRESS:
						The fifth word, Start Address, indicates the
						location of tag memory where a read or write
						operation will begin (when applicable).
	06		00	01		READ/WRITE LENGTH:
						The Read/Write Length is the sixth word (when
						applicable) and represents the number of bytes
						that are to be retrieved from or written to the
						RFID tag.

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