Chapter 7 Appendix — Technical information
ENGLISH - 299
f Example: Transmission of power supply status acquisition command (hash value is calculated from the user
name and password of the administrator account, and acquired random number)
“dbdd2dabd3d4d68c5dd970ec0c29fa6400QPW” (CR)
r Received data
Header Data section
Termination
symbol
Command
example
‘0’
0x30
‘0’
0x30
Control command
(ASCII string)
(CR)
0x0d
Data length 1 byte 1 byte Undened length 1 byte
f Example: The projector is powered on
“00001” (CR)
r Error response
String Details
Termination
symbol
Message
“ERR1” Undened control command
(CR)
0x0d
“ERR2” Out of parameter range
“ERR3” Busy state or no-acceptable period
“ERR4” Timeout or no-acceptable period
“ERR5” Wrong data length
“ERRA” Password mismatch
Data length 4 bytes ― 1 byte
Note
f The projector will automatically disconnect the connection with the network right after sending the command. This is the specication based
on the security view point to prevent unauthorized operation of this product by a malicious third party. To send commands continuously,
execute the network connection request every time the command is to be sent. For details, refer to “Communication ow between server
and client” (x page 299).
Communication ow between server and client
To send/receive a command via LAN, refer to the communication ow indicated below.
Server: Projector
Client: Control device such as a computer
Connection request
Server
Client
Sending of key
Sending of command 1
Responding to command 1
Disconnection
Connection request
Sending of key
Sending of command 2
Responding to command 2
Disconnection
Session 1
Session 2