Emsa HS500E manual S p o n s e P a c k e t S t r u c t u r e Ta b l e, Command Echo is

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

3 . 1 . 2		R e s p o n s e 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 response packet is the Overall
					returned
						Length. This 2-byte value indicates the total
					data words,
						number of words in the response (including this -
					if any)
						the Overall Length field). Length will always be at
						least six words (0x0006).
	2		(RF		(Command	RF ERROR	COMMAND ECHO /
			Error)		Echo / Error		ERROR CODE:
						COUNTER:
					Code)		The Command Echo is
						The MSB of the second
							returned in the LSB and
						word holds the single-
							displays the Hex value
						byte RF Error Counter.
							of the executed
						This value identifies the
							command.
						number of times RF
						transmission failed or	When an error occurs,
						could not be completed	the LSB will hold a
						for this command.	single byte Error Code.
	03		(IC)		(Node ID	INSTANCE COUNTER:	NODE ID ECHO:
					Echo) 0x01	The MSB of word 03	The LSB of the third
						contains the Instance	word, Node ID Echo,
						Counter. This single-	retrieves the Node ID of
						byte value is	the antenna that
						incremented by one	executed the command
						following each response	(this value will always be
						(range = 0x00 to 0x7F).	0x01 for the HS500E).
						Cycling power to the
						unit resets this counter
						to 0x00.
	04		(RFT1)		(RFT2)	RF TIME:
						Word 04 of a response packet contains the RF
						Time. This two-byte value indicates the portion of
						the Timeout Value (set in the Command Packet)
						that remains after the completion of the command
						(see Total Time below).
						RF TIME = (TIMEOUT VALUE - TOTAL TIME)

H S 5 0 0 E – O P E R A T O R ’ S M A N U A L	P / N : 1 7 - 1 3 0 5 R E V 0 2 ( 1 2 - 0 5 )
	P A G E 2 3 O F 8 2