Sanyo DSR-3009P Interface Specifications, RS-232C, Data format, Communication protocol

Models: DSR-3009P

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INTERFACE SPECIFICATIONS

INTERFACE SPECIFICATIONS

RS-232C

9-pin connector specifications

1 2 3 4 5

6

7

8

9

 

 

 

 

 

 

Pin No.

Signal

Operation

Signal direction

1

 

 

2

 

 

RXD

Receive data

Computer Digital video

 

 

 

 

 

recorder

3

 

 

TXD

Transmit data

Digital video recorder

 

 

 

 

 

Computer

4

 

 

5

 

 

GND

Ground

6

 

 

7

 

 

RTS

Request to

Digital video recorder

 

 

 

 

send

Computer

8

 

 

9

 

 

 

 

 

 

 

 

RS-232C Data format

Mode

Asynchronous

Character length

8 bits

Data transmit speed

2400, 4800, 9600, 19200 bps

Parity

None

Stop bit

1

 

 

 Data format Communication protocol

Communication is carried out in units of 1 byte. After the computer transmits one byte of data, it waits for a response from the digital video recorder, and then transmits the next byte of data.

To start sending commands, an ON (F6) command is sent. The digital video recorder will continue to receive commands until an OFF (F7) command is sent to stop. The digital video recorder sends an ACK (OA) each time it receives a command.

See Command Table on page 92.

RS-485

 Communication protocol Data format

Mode

Asynchronous

Character length

8 bits

Data transmit speed

2400, 4800, 9600, 19200 bps

Parity

None

Stop bit

1

 

 

RS-485 Communication protocol

A proprietary Sanyo protocol (SSP: Security Serial Protocol) is used. It is recommended that a special controller be used. Contact the place of purchase for further details on obtaining a special controller.

RS485 termination switch settings (RS485

TERMINATE)

RS485 termination switch settings (RS485 Termination setting

If several unit are being connected together, termination settings must also be made.

Set the RS485 termination switch on the rear panel to ON, and set the termination switch of the last device in the series to ON.

Be sure to set the RS485 termination switches of all devices in between (devices other than the first and last in the series) to OFF.

Note: If the termination settings are not correct, data will be reflected by either end of the series and this will affect the transmission of other data, so that the data that is transmitted to each device will not be correct.

(Example)

System controller

ON

 

 

 

 

POWER

 

RS485

GND

Termination switch

12V DC IN ON

A

B

 

 

01

 

 

A B

1 2 3

 

OFF

 

 

TERMINATE

 

OFF

RS485

TERMINATE

ON

OFF

Digital video recorder

RS485

TERMINATE

ON

OFF

Digital video recorder

English

91

Page 92
Image 92
Sanyo DSR-3009P instruction manual Interface Specifications, RS-232C, Communication protocol, RS-485 Data format