BenQ DLP PROJECTOR PE8700 User Manual

Page 63

X90

Image orientation - floor front

X91

Image orientation - ceiling front

X92

Image orientation - floor rear

X93

Image orientation - ceiling rear

X94

Back light board On

X95

Back light Board Off

X99

On line help

When an user sends a command, he must follow the command format in the list. After

he sends a command, program will acknowledge 2 pieces of information. This information,
we call it ‘ACK’ in the following content.

The format of first ACK is XnX

The length is 3, first and last characters are always be X. And the number ‘n’ is 0, 1 or

2. The explanation of n is

0: Right command format and function

1: Illegal format

2: Illegal function

So, if the user presses XA85, this one is wrong format, ACK will be X1X.

And if the user presses X98, because this function is not included in our command

table, ACK will be X2X.

For above situation, program sends the user an ACK, then waiting for a new

command.

If the user presses correct command, take an example, X35, first ACK, X0X will send

to the user. That tells the user it’s a right command. Then program starts to deal with this
command, and changes the aspect ratio to ‘anamorphic’ mode. When finish, the user will
receive 2

ACK. The format is Xn_ccX

The length is 6. First and last characters are X, second character is the ACK, followed

by a ‘_’ character. ‘cc’ is the function number. So, in this case, the 2

ACK is X0_35X. And

the user can continue to send next command.

For Y-group, this one is for our factory, not public. When our operators send

commands to the unit, the ACK format is identical as X-group, difference is only ‘Y’ instead
of ‘X’.