141, Serial RS232C Communication Protocol

SERIAL (RS232C) CONNECTOR COMMAND REFERENCE

■SERIAL (RS232C) Communication Protocol

With the SERIAL (RS232C) interface, you can control functions of this unit by transferring the specified commands from a per- sonal computer (PC) to this unit.

Notes:

•This unit does not support the communication converted between the SERIAL (RS232C) and USB interface.

•When controlling the unit with the SERIAL (RS232C) interface, the following parameters should be identical between the communication devices.

The setting is available in "SETUP MENU" – "Comm" – " SERIAL (RS232C) Setting". Baud Rate

Data Bit Parity Stop Bit

■Command Format

The following pages detail how to write the commands.

1. The following details how to write the commands

Code	[STX] AD [Unit address of this unit] [Transmission Command] : [p] [ETX]

ASCII	(02H) – – – – – – – – – – – – – – – – – – – – – – – – – – – (03H)

STX: This shows the data start. STX (ASCII code: 02h) is always prefixed to data. h shows hexadecimal digit.

Transmission command: A command shown in the Command List is designated.

ETX: This shows the data end. ETX (ASCII code: 03h) is always prefixed to data. The character code is ASCII.

When a command needs a parameter, a colon (:) is used for dividing the command and parameter. The following shows how to write the commands when two or more commands are specified.

Code

[STX] AD [Unit address of this unit] [Transmission Command] : [p1] : [p2] [ETX]

2. Response Command (from the Unit to the PC)

The unit sends back the response command for the transmission command from the PC.

•When the reception was completed successfully

The response command differs between when an ANSWER command (sending back the status or data) is required or when not required.

•When no ANSWER command is required

The unit sends back the same identifier as that in the transmission command, as shown in the figure.

Transmission command (→ The unit)			Response command (← The unit)
[STX]	OPL	[ETX]	[STX]	OPL	[ETX]

Same identifier

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Panasonic WJ-HD309 manual 141, Serial RS232C Communication Protocol, Command Format

Models: WJ-HD309