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3. Management with Web browser software
3.7.4 Communication method
3.7.4.1 HALF-DUPLEX
The communication method can be selected from the menus, only when the
NETWORK BRIDGE is selected for the COMMUNICATION TYPE.
(Operating Guide - OPTION menu - SERVICE – COMMUNICATION –
TRANSMISSION METHOD)
HALF-DUPLEX FULL-DUPLEX
This method lets the projector receive and transmit data, but only one direction at
a time.
The method does not allow the projector to receive the data from the computer
while waiting for response data from an external device. After the projector
receives the response data from an external device or the response limit time is
past, the projector can receive data from the computer.
That means that the projector controls transmitting and receiving the data to
synchronize the communication.
To use the HALF-DUPLEX method, set up the RESPONSE LIMIT TIME and
BYTES INTERVAL TIMEOUT, following the instruction below.
1) Using the RESPONSE LIMIT TIME menu, set the waiting time for response
data from an external device. (Operating Guide - OPTION menu -
SERVICE – COMMUNICATION – RESPONSE LIMIT TIME )
OFF 1s 2s 3s ( OFF)
2) If the response data from an external device is blank in a certain time
period (BYTES INTERVAL TIMEOUT), the projector will determine when the
response data is nished, and start to send data again.
If a blank time in the response data is longer than the BYTES INTERVAL
TIMEOUT, the projector cannot receive all data, then the computer may not be
able to control an external device well.
Using the BYTES INTERVAL TIMEOUT menu, set the waiting time for
response data to match your system. (Operating Guide - OPTION menu -
SERVICE – COMMUNICATION – BYTES INTERVAL TIMEOUT)
50ms 100ms 150ms 200ms ( 50ms)
RS-232C
RS-232C cable
External device
Ethernet
LAN cable
Computer
Protocol change
TCP/IP data Serial data
Transmitting data
Discarding data
Transmitting data
Response limit
time
Transmitting data
Response data
Response data
48


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