GE 0150-0193G User Manual

0150-0193G 

85 

DVMRe Triplex 

The RS232 Alarm/Event Generation /Text Insertion Protocol is designed to deliver Alarm, Event 
(commands), and Text data to the DVMRe 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. 

 

 

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 

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