0150-0319A 80
Vista
Triplex
2
CDR/DVD
8
RS232
Event Generation/Text Insertion Protocol
The RS232 Alarm/Event Generation /Text Insertion Protocol is designed to deliver Alarm, Event
(commands), and Text data to the Vista Triplex
2
CDR/DVD from serial interface devices through the
RS232 port.
Setting and Clearing Alarms with this Protocol is equivalent to activating and deactivating
Alarms on the hardware alarm inputs.
8.1 Message Structure
Delimiter
Class
Command
Data Length
Data
The
Delimiter
byte signals the start of a new message, and has a value of 0xFF.
The
Class
and
Command
fields identify the type of message.
The
Data Length
is a 16-bit value indicating the number of bytes in the
Data
portion of
the message. Data Length is sent using Intel byte ordering (Little Endian).
The
Check Sum
byte is the result of XORing all the bytes in the message.
Check Sum
8.2 Message Type
0xFF
0x14
0x40
Data Length[0]
Data Length[1]
Camera
Alarm/Event
String[0]
String[1]
:
String[n-1]
One message is currently supported to store text along with recorded video.
CMD_NEW_ADD_TEXT
Class
byte is 0x14.
Command
byte is 0x40.
Data Length
is the number of data bytes in the message (from 2 to 502).
Camera
byte indicates the camera associated with the alarm, event, or text. The
valid range is from 0 to 15.
Alarm/Event
byte usage is described in the following section.
String
fields contain text characters. The string length can be from 0 to 500
characters in length. The String field is not required. If text data is available, it will be
recorded with the next video frame for the camera identified by the camera field.
Check Sum
NOTE
Summary of Contents for Triplex2
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