Mitsubishi Electric UD740U User Manual page 4

［RS-232C control flowchart］
No NAK returned
Command is sent successfully.
Command is executed successfully.
Checking execution of
command (sending out
check command)
OK
END
［Method of checking state of projector］
To normal operation
Enter password.
Send out "00PASS****".
[Compatibility with the former models]
To use the RS-232C commands designed for the former models of Mitsubishi projector, by inputting
"00COMMAND0", the projector responds in the same way as the former models. (No NAK is returned.)
(For the recommended procedure to use the former command systems, see "Controlling the projector using a
personal computer" for FL7000U.)
ITEM
Changing the RS-232C command system
Sending out command
Awaiting response
from projector
Command is sent successfully.
Command execution fails.
Check the following.
 Check that the function code is correct.
 Check that the data code is correct.
 Check that the projector is able to issue
the return command.
NG
→Check the projector's operation using
the 00vST command.
Note: In the following cases, NAK is
returned even when the projector is
in normal condition.
 Immediately after the power is
turned on (about 20 seconds to 2
minutes)
 During input switching
 During auto positioning
 During password lock
Sending "00vST"
0-3
Checking response to "00vST" Checking response to "00vST"
6
Character
COMMAND
START
NAK returned
4
5
Projector is functioning.
Function
ASCII
43h 4Fh 4Dh 4Dh 41h
4Eh 44h
4
No response for
1 second or longer
Command sending fails.
Check the following.
 Check that the command begins
with "00".
 The projector is not supplied with
AC power.
→Check that AC power cord is
connected.
→Turn on the power. (Turn on the
circuit breaker or main switch.)
 Not connected with the projector.
→Check that the RS-232C cable is
connected.
→Check the RS-232C cable for
electrical discontinuity.
Projector error
Send out "00vER" to check error details.
Recover from error state.
Data
0 (Former command system),
1 (New command system)