Omega Vehicle Security DRA-DCC-8 Baud Rate Select, Command Formats, Without Echo Back Format

7.4.1 BAUD RATE SELECT

SW1 and SW2 select one out of four available baud rates.

	SW1	SW2
300 BPS	OFF	OFF
4800 BPS	ON	OFF
9600 BPS	OFF	ON
19200 BPS	ON	ON

7.4.2 ID CODE

Up to eight DRA-DCC-8s can be connected in a multidrop configuration. Switches SW3, SW4, and SW5 (MSB) set the ID code.

7.4.3 COMMAND FORMATS

Three types of command formats are available:

Without echo back

The host computer sends a massage and does not receives an acknowledgment.

With echo back

The host computer sends a message and receives an acknowledgment stating the DRA-DCC-8 ID number and the addressed channel number.

Status report

7.4.3.1.WITHOUT ECHO BACK FORMAT

[A][ID CODE] [CHANNEL VALUE] [CR]

The character A begins the command block.

The second byte is the ID code (07). The third byte is the addressable channel number (07). Up to four bytes of a channel's value can be in BCD mode (0-4095). Leading zeroes can be omitted. The last byte is [CR] which must terminate the command block.

7.4.3.2.WITH ECHO BACK FORMATS

[C][ID CODE] [CHANNEL VALUE] [CR]

This format differs only in the opening character. After every command block transfer, the DRA-DCC-8 echoes back the following:

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