Owner's Manual

3
Command and response formats
Communication between the remote controller (RC) and the AV takes the form of sequences of bytes, with all commands and responses having the
same basic format. e AV shall always respond to a received command, but may also send messages at other times.
Each transmission by the RC is the following format:
<St> <Zn> <Cc> <Dl> <Data> <Et>
 St (Start transmission): 0x21 ‘!’
 Zn (Zone number): see below.
 Cc (Command code): the code for the command
 Dl (Data length): the number of data items following this item,excluding the ETR
 Data: the parameters for the command
 Et (End transmission): 0x0D
Each response by the AVR is the following format::
<St> <Zn> <Cc> <Ac> <Dl> <Data> <Et>
 St (Start transmission): 0x21 ‘!’
 Zn (Zone number): see below.
 Cc (Command code): the code for the command
 Ac (Answer code): see below.
 Dl (Data Length): the number of data items following this item, excluding the ETR
 Data: the parameters for the response of length n. n is limited to 255.
 Et (End transmission): 0x0D
e AV responds to each command from the RC within three seconds. e RC may send further commands before a previous command response has
been received.
Controlling via RS232/NET
Introduction
is document describes the remote control protocol for controlling via the RS232/NET interface. e AV implements virtual IR commands in order
to simplify the protocol. Any operation that can be invoked using the IR remote control can be achieved over a control link using the Simulate RC5 IR
command (0x08). See page 7 for details of this command. e RC5 IR code set is listed from page 39.
Set-up
e AV must be correctly congured for Control; by default, Control is disabled for minimum standby power consumption. RS232 control can be
enabled using the front panel: press and hold the front panel DIRECT button for 4 seconds until “RS232 CONTROL ON” is displayed on the VFD.
Alternatively, Control for RS232 or IP can be enabled using the OSD menu. Press
A
followed by
U
on the remote control in order to access the setup
menu. Use the cursor keys
< > , '
and
O
to enter the General Setup menu and locate the option Control. Press
O
,
,
then
O
to change
this parameter to ‘On’. IP control is via port 50000 of the IP address of the unit (in the Network Settings menu).
Conventions
 All hexadecimal numbers begin 0x.
 Any character in single quotes gives the ASCII equivalent of a hex value.
 <n> represents an unknown or variable number.
1
5
6 9
1
5
6 9
DB9 Female
DB9 Female
e cable is wired as a null modem:
Connector 1 pin Connector 2 pin Function
2 3
Rx  Tx
3 2
Tx  Rx
5 5 RS232 Ground
Data transfer format
 Transfer rate: 38,400bps.
 1 start bit, 8 data bits, 1 stop bit, no parity, no ow control.
Serial Cable Specification