Marantz SR8300 Transmission data format, Page, RS232C Control Spec, SR9300/8300, Document Version

: 15h

RS232C Control Spec	Page: 5 / 16
SR9300/8300	Document Version [2.00]

3-2. Transmission data format

3-2-1. Transmission data format from Host to Slave

There are two kinds of transmission data form from Host shown below.

3-2-1-1. Form1: Command

Command is a data that requests some status change.

Start character	: ’@’
ID	: ‘0’ ~ ‘9’ (A Slave has own ID, A Host has to set the ID.)
COMMAND	: see “Command list”
End character	: 0Dh

S tart

‘@ ’

ID

C O M M A N D

E n d

0 D h

3-2-1-2. Form2: Status request

Status request is a data that requests a answer of some status.

Start character	: ’@’
ID	: ‘0’ ~ ‘9’ (A Slave has own ID, A Host has to set the ID.)
Request character	: ‘?’
Request status	: see “Status request list”
End character	: 0Dh

Start

‘@ ’

ID

R equest status	E n d
‘?’
	0 D h

3-2-2. Transmission data format from Slave to Host

There are two kinds of transmission data form from Slave shown below.

3-2-2-1. Form1: ACK/NAK

ACK is a reply data from Slave when Slave got an acceptable command data from Host.

ACK: 06h

A C K

0 6 h

NAK is a reply data from Slave when Slave got an incorrect Command data, Status request data or some other data from Host.

NAK

N A K 15h

3-2-2-2. Form2: Status answer

Status answers are reply data when Slave got an acceptable Request status data from Host.

Start character	: ’@’
ID	: ‘0’ ~ ‘9’ (A Slave will set own ID.)
Answer character	: see “Status answer list”
End character	: 0Dh

Start

‘@’

ID

Status answer

End

0Dh