What Is Actually Sent In A Message - Wolf cinema DCX-500i Owner's Manual

Appendix B ► Serial Communications
2.3 What is actually
sent in a Message
• For Single Projector
• For Broadcasting
Message Format
(
Code
(
Code
(
$ Code
(
& Code Data
• For Specific Projector Within a Network
• 1 Controller Present
Message Format
(
Dest. Addr.
(
$ Dest. Addr.
• For Specific Projector Within a Network
• Multiple Controllers Present
Message Format
space
(
Dest. Addr.
space
( $
Dest. Addr.
space
( $
Dest. Addr.

WhaT Is aCTUallY senT In a Message

Although you will send and read messages as strings of ASCII characters, the actual message
travels as a sequence of bytes. Each character in this sequence requires 1 byte. See example
below, which illustrates a "lamp limit is 2000 hours" reply from the projector.
(
ASCII = L
HEX = 0x28 0x4c
B-6
Function
)
Data
SET
( )
Code ?
REQUEST
(what's current contrast?)
)
! Data
REPLY
SET AND
)
Data
ACKNOWLEDGE MESSAGE
(message processed?)
space
)
Checksum SET WITH CHECKSUM
Function
)
Code Data
SET (turn proj.#5 on)
SET AND
)
Code Data
ACKNOWLEDGE MESSAGE
(message processed?)
Function
)
Src. Code ?
REQUEST
proj. #5 to controller #2)
SET AND
)
Src. Code Data
ACKNOWLEDGE MESSAGE
(is message from controller #2
processed by proj. #5?)
)
REPLY
Src. Code Data
controller #2: contrast is 64)
2
P L !
0x50 0x28 0x21 0x32
ASCII as Hex
Examples
(con64)
(set contrast to 64)
(Con?)
(CON!064)
(contrast is 64)
($con64)
(&CON64 240)
Examples
(5pwr1)
($5pwr1)
Examples
(5 2con?)
(get contrast from
($5 2con?)
(002 005CON!064)
(from proj. #5 to
)
0 0 0
0x30 0x30 0x30 0x29