Denon DN-F650R Owner's Manual download pdf (Page 36)

RS232C control

You will be able to perform the three control functions from the

host by connecting an RS-232C straight cable to the RS-232C serial

terminal (9-pin D-sub) connector.

GThree control functionsH

q Controlling and operating DN-F650R from the host (vpage28)

w Sending the status information to the host when DN-F650R

receives a status request command from the host (vpage29)

e Automatically sending the status information to the host

when there is a change to the DN-F650R status(vpage29)

n Connections

• Compatible Connector: 9-pin D-sub (male)

• Communication speed: 38,400 Bps

• Data Bit: 8 Bit

• Parity: None

• Stop Bit: 1 Bit

• Flow Control: None

Pin Arrangement

Pin Number Signal Name

1 Ground

6 NC

2 TxD

7 NC

3 RxD

8 NC

4 NC

9 NC

5 S. Ground

n Structure of Control Commands

Each packet of a control command begins with the Start Character

‘@’and ends with the End Character “0x0D” as shown below.

COMMAND

Start

Character

End

Character

CR (0x0D)

n Structure of Command Codes

Item

Value (the hex value is indicated in

parentheses)）

Start character ’@’ (0 x 40)

ID ’0’ (0 x 30)

Command Indicate a description of the command.

End character ’CR’(0 x 0D)

The response timeout is 100msec.

n Command Codes for ACK (Acknowledgement)

and NACK (No acknowledgement)

Description

Hex

value

Conditions for sending command

codes

ACK 0 x 06 ---

NACK 0 x 15 • When an End Character (0x0D) is

received without a Start Character ‘@’

• When an invalid command is received

• When the signal transmission is

stopped for 5msec or more between

the characters of a command.

• When a command is received, DN-F650R responds either with an

ACK or NACK command within 100 msec.

• If DN-F650R does not respond with either command even after 100

msec have elapsed, the next command is accepted.

q Controlling and operating DN-F650R from the host

When DN-F650R receives a control command from the host, the

unit sends an ACK (acknowledgement) command and executes the

command.

When DN-F650R receives data other than the speciﬁed commands or

an End Character (0x0D) without a Start Character (‘@’), a reception

error occurs and the unit sends a NACK command.

For “Control command code table” (vpage30).

DN-F650R Host

ACK

Control command

Handshake ﬂow charts for control command

1 2 ... 31 32 33 34 35 36 37 38 39 40 41 ... 53 54

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Denon DN-F650R Owner's Manual Page 36

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