Fujitsu 50FH5037E-02, M3097E manual 126

		Sequence 1	t1	Sequence 2			Sequence 3		t1	Sequence 4
H	S	P S S	P S						S	P S
RXD	T 0	1 0 0 0 0 0 0 B P T 0 1 0	0 0 0 1 0 B P						T	1 1 1 1 1 1 1 1 B P
L	B	B B	B						B	B
H			S	P S	S	P S S	P S S	P S S	P S
TXD			T 1	1 1 1 1 1 1 1 B P	T 0	0 1 0 0 0 0 0 B P T 0 1	1 1 0 0 1 1 B P T 0 0 0 0	0 1 1 1 B P T 1	1 0 0 0 0 0 0 B P
L			B	B	B	B B	B B	B B	B
H
CTS				t2					t2
L
H
RTS
L
H
DTR
L
H
DSR
L

t1: Less than 500 ms

t2: more than 1 word length

Sequence 1: The host computer sends the RETURN SENSE command to the scanner.

X`02', `42'

Sequence 2: ACK for the RETURN SENSE command is sent to the host computer.

X`FF'

Sequence 3: Response for the RETURN SENSE command is sent to the host computer.

X`04', `4E', `E0', `01'

Sequence 4: ACK for the response (issued at Sequence 3) is sent to the scanner.

X`FF'

Figure 6.10 Return Sense command sequence