22
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) [02H], and ends with ETX (End of Text)
[03H].
· If the communication format or command name is wrong, NAK (Negative Acknowledgement) [15H] will be sent
from the Presenter as a result of failing to receive correctly.
· When the communication format is correctly received, the Presenter sends ACK (Normal Acknowledgement)
[06H].
Transmission Command (PC
Visual Presenter)
Each operation command is executed in ASCII code, and transmitted in a set of 7 bytes as follows:
S
T
X
E
T
X
Command
(PC)
(
Visual Presenter
)
ACK
Data
Parameter
[02H]
[03H]
[06H]
Response data format (Visual Presenter
PC)
· Status request format (Parameter 0)
S
T
X
Nega
/Posi
Color
/B&W
30H
Electronic
image
enlargement
Local
Lock out
E
T
X
(Visual Presenter)
30H
Lighting
selection
30H
[02H]
S
T
X
E
T
X
56H
46H
42H
V
F
B
(Visual Presenter)
[02H]
[03H]
· ROM version
