Honeywell VideoBloX User Manual page 142

SYSTEM CONFIGURATION
For example, when using the HRHD's protocol to control DVR, the command format is:
Where the red characters "!Ad!" and "!Sd!" are replaced corresponding variable value
when commands are sent. "!Ad!" means address and "!Sd!" means checksum. Refer to
the following table for detailed information.
Character
Therefore, when the command "POWER" is sent, the command in ASCII code mode is:
Control Code
When in control code mode, the system controls device using hexadecimal digits.
For example, when controling DVR, the command format is:
126
@!Ad!DRFP00:N!Sd!
Meaning
A Address
X XOR check
S Sum check
d Decimal
x Hexadecimal
@01DRFP00:N78
8a!A0100005a!S
Example
!d! : One digit decimal address. (If these is no
capital character, system will consider it as Address,
so !ddd! is a three digits decimal address).
!Ad! : Two digits decimal address.
!Add! : Three digits decimal address.
!Xd! : Two digits decimal XOR check. (At least two
digits)
!Xdd! : Three digits decimal XOR check.
!Sd! : Two digits decimal sum check. (At least two
digits)
!Sdd! : Three digits decimal sum check.
!x! : One digit hexadecimal address.
!Ax! : Two digits hexadecimal address.
!Axx! : Three digits hexadecimal address.
!Xx! : Two digits hexadecimal XOR check. (At least
two digits)
!Xxx! : Three digits hexadecimal XOR check.
!Sx! : Two digits hexadecimal sum check. (At least
two digits)
!Sxx! : Three digits hexadecimal sum check.