Fujitsu M3097G manual 122

4.7Command Sequence

This section describes the initial sequence and read sequence.

4.7.1Initial sequence

Host side Scanner side

Power ON/reset/initialize

Scanner does not respond for 3

				Verify the logical unit			INQUIRY	Prepare INQUIRY data
							INQUIRY data	Respond with INQUIRY data
				Verify scanner READY		TEST UNIT READY		Respond with GOOD status
								if READY
							Status byte
Check status byte								Respond with CHECK
		Receive GOOD status						CONDITION status if
								UNIT ATTENTION
		Receive CHECK CONDITION
		status				REQUEST SENSE		Prepare sense data
		Request sense data
								Respond with sense data
							Sense data
					Receive UNIT ATTENTION
								Clear sense data (Release
					sense data			UNIT ATTENTION)
				Verify scanner READY		TEST UNIT READY		Respond with GOOD status
								if READY
							Status byte
	Check status byte							Respond with CHECK
			Receive GOOD status					CONDITION status if
								NOT READY
			Receive CHECK CONDITION
			status					Prepare sense data
			Request sense data
								Respond with sense data
						REQUEST SENSE
			Receive sense data
							Sense data
					NOT READY
					HARDWARE ERROR
				End (Ready to read)				End (Ready to read)
				Abnormal termination

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