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Sequence 1
H
S
P
S
S
RXD
T
0 1 0 0 0 0 0
0
B
P
T
0
1
0 0 0 0 1 0
B
B
B
L
H
TXD
L
H
CTS
L
H
RTS
L
H
DTR
L
H
DSR
L
t
Sequence 2
1
P
S
B
P
B
S
P
S
T
1 1 1 1 1 1 1 1
B
P
B
B
t
2
t
: Less than 500 ms
1
t
: more than 1 word length
2
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
Sequence 3
S
P
S
S
P
S
S
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
B
B
B
B
t
1
S
T
1 1 1 1 1 1 1 1
B
P
S
S
P
S
B
P
T
1 1 0 0 0 0 0 0
B
P
B
B
B
t
2
Sequence 4
P
S
B
P
B
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