Rs-232 Controller Command Set; Connector Pin Assignment; Communication Format; Command Format - Datavideo HDR-70 Instruction Manual

HD / SD Recorder

RS-232 Controller Command Set

Connector Pin Assignment

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

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 [10h, 01h, 11h]
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 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
02h, F5h, 08h, 00h, FFh
02h, F5h, 08h, 01h, 00h
01h, F0h, nn, csum
Controller
Pin 2 (Rx)
Pin 3 (Tx)
Pin 5 (GND)
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(1~99)
25
Recorder
Pin 3 (Rx)
Pin 2 (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
HDR-70
9 Pin D-Sub
Name
Device Type
ACK
ACK
ACK
ACK
ACK