Christie QUADHD84, Quick Start Manual

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A2
RS-232C
RJ-45
Controlling the Multiple Product
RS-232C
RJ-45
QuadHD84 Quick Start Guide
020-000672-01 Rev. 1 (10-2013)
RS232C CheckSum
Header (5 bytes) Payload (4 bytes)
Checksum
(1byte)
command Prefix code
#0
Prefix code
#1
Set
ID
Payload
Type
# of payload
bytes
Command data #0 data #1 data #2 CS #0
Set Power 0xCC 0x33 0 4 0x10 "0 : 0ff
1 : On"
reserved
(0x00)
reserved
(0x00)
Header XOR
Payload
We can make CheckSum with Header (5 bytes) and Payload(4 bytes).
(Prefix code#0) XOR (Prefix code#1) XOR (Set ID) XOR (Command Payload Type) XOR
(# of Payload bytes) XOR (Command) XOR (data #0) XOR (data #1) XOR (data#2) =
CheckSum
For example:
(0xCC) XOR (0x33) XOR (0x01 = Set ID) XOR (0x00) XOR (0x04) XOR (0x10) XOR (0x01 =
ON) XOR (0x00) XOR (0x00) = 0xEB
* Full list of RS-232C / RJ-45 commands available on request.