Visual Presenter Instruction Manual
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47
Data Format Specifications
This command is executed in the form of 1-command/1 packet. The next command is not
accepted until the previous processing is completed.
• The communication command always starts with STX (Start of Text) , and ends with ETX
(End of Text) .
• If the communication format or command name is wrong, NAK (Negative
Acknowledgement) will be sent from this product as a result of failing to receive correctly.
• When the communication format is correctly received, this product sends ACK (Normal
Acknowledgement).
■ Transmission Command (PC → Visual Presenter)
Each operation command is executed in ASCII code, and transmitted in a set of 7 bytes as
follows:
■ Response data format (Visual Presenter → PC)
All response data is transmitted as ASCII code, and it covers parameter in the table of
operation command.
• Status 0
• Status 2
S
T
X
E
T
X
Command
(
PC
)
(
Visual Presenter
)
→ ACK
Data
Parameter
S
T
X
P
o
s
i
/
N
e
ga
C
olor
/
B
&W
P
oi
n
t
e
r
di
s
pla
y
E
l
e
c
t
ro
n
i
c
e
n
larg
e
m
e
n
t
L
o
c
al
lo
c
k
o
u
t
E
T
X
R
G
B
o
u
t
p
u
t
s
e
l
e
c
t
io
n
L
ig
h
t
i
n
g
s
e
l
e
c
t
io
n
P
a
u
s
e
γ
adjustment
32H
Video
output
selection
S
T
X
Image
rotation
Aperture
White
balance
Contrast
30H
(Normal)
31H
(Adjustment)
E
T
X