Communication Procedure - Sony VPL-FE100U Protocol Manual

7.

COMMUNICATION PROCEDURE

All communication between CONTROLLER (PC, etc.) and DEVICE (PROJECTOR, SWITCHER) is
performed by the transfer block format. Communication is started by the issue of a command at
CONTROLLER and ended when the return data is sent to CONTROLLER after DEVICE receives the
command.
CONTROLLER is prohibited from sending several commands at one time. This means that after
CONTROLLER sends one command, it cannot send other commands until DEVICE returns the return
data. DEVICE sends the return data after processing the command. The time from when CONTROLLER
sends the command until the return data is returned differs according to the contents of the command.
In some cases, CONTROLLER may receive data from DEVICE even though it has not sent a command.
(For example, during SYS setting, SIRCS command, and switcher information when switcher is selected.)
Note : When All (00 hex) is specified for the INDEX No., return data may not be returned in
some cases.
VPL-FE100U/FE100E/FE100M
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