JVC DLA-RS2 manual RS-232C Interface, RS-232C Specifications, Command Format, Gnd, Ack

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RS-232C Interface

Control of this unit via a computer is possible by connecting the computer to this unit with a RS-232C cross cable (D-Sub 9 pin).

RS-232C Specifications

This unit

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Pin No.	Signal	Operation	Signal Direction
2	RxD	Receive data	This unit  PC
3	TxD	Transmit data	This unit  PC
5	GND	Signal ground	b
1, 4, 6 b 9	N/C	b	b

zPC refers to the controller such as a personal computer.

Mode	Non-synchronous
Character Length	8 bit
Parity	None
			D0	D1	D2	D3	D4	D5	D6	D7
Start Bit	1
Stop Bit	1
		Start Bit								Stop Bit
Data Rate	19200 bps
Data Format	Binary

Command Format

The command between this unit and the computer consists of “Header”, “Unit ID”, “Command”, “Data” and “End”.

zHeader (1 byte), Unit ID (2 bytes), Command (2 bytes), Data (n bytes), End (1 byte)

„Header

This binary code indicates the start of communication.

Binary code	Type	Description
21	Operating command	PC  This unit
3F	Reference command	PC  This unit
40	Response command	This unit  PC
06	ACK	This unit  PC

(When the command is accepted without error, it returns to PC)

„Unit ID

This code specifies the unit. The binary code is fixed at “8901”.

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