Rs-232 Controller Command Set; Communication Format; Command Format; Command Protocol - Datavideo DN-600 Instruction Manual

Communication Format

Mode:
Character Length:
Data Rate:
Parity:

Command Format

CMD1, CMD2, Data bytes ...., Checksum byte
A Command is made up of two address bytes, CMD1 and CMD2, a variable number of Data bytes
(Data from 0 up to 15) and a Checksum byte. The Checksum byte is the modulo 256 sum of all
preceding bytes.
The most significant nibble of the CMD1 byte represents the command group. The least significant
nibble represents the number of Data bytes to follow the CMD2 byte.

Command Protocol

CMD1, CMD2, Data bytes ...., Checksum byte
Response: ACK
Other than the sense command, the unit will respond to all commands affirmatively by sending a three
byte acknowledgement (ACK) if the Checksum is valid. If the Checksum is not valid, the DN Recorder
will ignore the command. Most commands will be responded to within 8 msec. However, a PLAY
command from an idle state will result in response delay of up to 700 msec. During this busy time, all
commands will be ignored.

Summary List of Commands

Command
00h, 11h, 11h
00h, F1h, F1h
00h, F2h, F2h
00h, F4h, F4h
00h, F5h, F5h
01h, F0h, XXh, csum

Connector Pin Assignment

Interface : 9 pin D-Sub female to 9 pin D-Sub female
The pin assignment of the Controller and DN-600 or DN-700 recorder is shown in the following table:
9 Pin D-Sub

RS-232 Controller Command Set

No synchronization
1 start bit + 8 data bits + 1 parity bit + 1 stop bit
38,400 Baud
Odd
Name
System Control
Device Type Request
Next Bin
Previous Bin
Disable Loop Play
Enable Loop Play
Select Bin
Controller
Pin 2 (Rx)
Pin 3 (Tx)
Pin 5 (GND)
Response
12h, 11h, 00h, 00h, 23h
10h, 01h, 11h
10h, 01h, 11h
10h, 01h, 11h
10h, 01h, 11h
10h, 01h, 11h
DN-600 / 700
Pin 3 (Rx)
Pin 2 (Tx)
Pin 5 (GND)
29
Name
Device Type
ACK
ACK
ACK
ACK
ACK
9 Pin D-Sub