Cambridge Audio Azur 840A Manual

Gallery Court, Hankey Place, London SE1 4BB England Tel: +44 (0)20 7940 2200 Fax: +44 (0)20 7940 2233 Web: www.cambridge-audio.com

Azur 840A (V1 & V2) and 840E Serial Control Protocol V1.1

1.1 RS232 Protocol

The protocol is accessed via COM1 i.e. the rear panel RS232C port.

1.2 Command Format

Header Command Command Command Footer

Group Number Data

# 1 to 6 , 01 to 18 , XXXX CR

byte num: 1 1 1 2 1 XX 1

Notes:

All data consists of ASCII bytes.

Settings for RS232 comm port are 9600,N,8,1 with no handshaking.

CR is carriage return, ASCII value 13 decimal.

Command Data consists of 10 characters maximum.

1.3 Command Groups

Commands are split into the following groups:

Command Description

Group

1 Control Commands

2 Setup Commands

3 Replies from Setup Commands

4 Replies from Control Commands and Updates

5 Error Messages

Gallery Court, Hankey Place, London SE1 4BB England Tel: +44 (0)20 7940 2200 Fax: +44 (0)20 7940 2233 Web: www.cambridge-audio.com

1.4 Commands and Messages

1.4.1 Group 1 - Control Commands

Command Command Description Command Data Example

Number

01 to 07 Main Input Selects No Data #1,02,\r - Select Input 2

08 Tape Monitor 0 - Off, 1 - On #1,08,1\r - Tape monitor on

09 Main Input Up No Data #1,09,\r - Next input up

10 Main Input Down No Data #1,10,\r -Next input down

11 Power State 0 - Standby, 1 - On #1,11,0\r - Put 840A in standby

12 Mute State 0 - Mute Off, 1 - Mute On #1,12,1\r - Mute volume

13 Goto Volume 00 to 72 - Volume Level #1,13,10\r - Set volume to 10

Note - For 840A V1 : 00:min, 72:max

For 840A V2 & 840E : 00:min, 96:max

14 Volume Up No Data #1,14,\r - Start volume up

15 Volume Down No Data #1,15,\r - Start volume down

16 Volume Stop No Data #1,16,\r -Stop volume changing

17 Set Balance 00 to 16 - Balance Level #1,17,08\r -Balance neutral

Note - 00:max left, 08:neutral, 16:max right

18 Balance Right No Data #1,18,\r -Balance right

19 Balance Left No Data #1,19,\r -Balance left

20 LCD Brightness 0 - Off, 1 - Dim, 2 - Bright #1,20,2\r - LCD bright

21 Speaker Select 0 - A, 1 - AB, 2 – B (840A V1 & V2 only) #1,21,1\r - Speaker AB

23 Abus Input Select 1 - Input 1, 2 - Input 2, 3 - Input 3, 4 - Input 4,

5 - Input 5, 6 - Input 6, 7 - Input 7,

8 - Tape Monitor

#1,23,7\r - Select Abus input 7

24 Set Bass 00 to 30 - Bass Level

Note - 00:min, 15:neutral, 30:max #1,24,15\r -Bass neutral

25 Set Treble 00 to 30 - Treble Level

Note - 00:min, 15:neutral, 30:max #1,25,15\r -Treble neutral

26 Set Direct 0 - Off, 1 - On #1,26,1\r - Direct on

Gallery Court, Hankey Place, London SE1 4BB England Tel: +44 (0)20 7940 2200 Fax: +44 (0)20 7940 2233 Web: www.cambridge-audio.com

1.4.2 Group 2 - Setup Commands

Command Command Description Command Data Example

Number

01 Get Software Version No Data #2,01,\r - Get software version

02 Get Protocol Version No Data #2,02,\r - Get protocol version

03 Set Input Name 1 to 8,Name #2,03,2,Ipod\r - Name input 2 'Ipod'

Note - Name must be max 8 characters

1.4.3 Group 3 - Replies from Setup Commands

Command Command Description Command Data Example

Number

01 Software Version X.X #3,01,1.2\r - Software is version 1.2

02 Protocol Version X.X #3,02,2.4\r - Protocol is version 2.4

03 Input Name Changed 1 to 8,Name #3,03,3,DAB \r - Input 3 named 'DAB '

Note - Name will be max 8 characters

Gallery Court, Hankey Place, London SE1 4BB England Tel: +44 (0)20 7940 2200 Fax: +44 (0)20 7940 2233 Web: www.cambridge-audio.com

1.4.4 Group 4 - Replies from Control Commands and Updates

Command Command Description Command Data Example

Number

01 to 07 Main Input Source Changed No Data #4,02,\r - Main input 2 selected

08 Tape Monitor Changed 0 - Off, 1 - On #4,08,1\r - Tape monitor on

11 Power State Changed 0 - Standby, 1 - On #4,11,0\r - 840A in standby

12 Mute State Changed 0 - Mute Off, 1 - Mute On #4,12,1\r - Mute on

13 Volume Changed 00 to 72 - Volume Level #4,13,15\r - Volume level now 15

Note - For 840A V1 : 00:min, 72:max

For 840A V2 & 840E : 00:min, 96:max

14 Volume Increasing No Data #4,14,\r - Volume increasing

15 Volume Decreasing No Data #4,15,\r - Volume decreasing

16 Volume Stopped 00 to 66 - Volume Level #4,16,20\r - Volume stopped changing at 20

17 Balance Changed 00 to 16 - Balance Level

Note - 00:max left, 08:neutral, 16:max right #4,17,08\r -Balance is neutral

20 LCD Brightness Changed 0 - Off, 1 - Dim, 2 - Bright #4,20,1\r - LCD dim

21 Speaker Selection Changed 0 - A, 1 - AB, 2 – B (840A V1 & V2 only) #4,21,1\r - Speaker B selected

22 Headphones In / Out 0 - Out, 1 - In #4,22,1\r - Headphones inserted

23 A-BUS Input Source Changed 1 - Input 1, 2 - Input 2, 3 - Input 3, 4 - Input 4, #4,23,7\r - A-BUS input 7 selected

5 - Input 5, 6 - Input 6, 7 - Input 7,

8 - Tape Monitor

24 Bass Level Changed 00 to 30 - Bass Level

Note - 00:min, 15:neutral, 30:max #4,24,15\r -Bass is neutral

25 Treble Level Changed 00 to 30 - Treble Level

Note - 00:min, 15:neutral, 30:max #4,25,15\r -Treble is neutral

26 Direct State Changed 0 - Off, 1 - On #4,26,1\r - Direct is on

Gallery Court, Hankey Place, London SE1 4BB England Tel: +44 (0)20 7940 2200 Fax: +44 (0)20 7940 2233 Web: www.cambridge-audio.com

1.4.5 Group 5 – Error Messages

Command Command Description Command Data Example

Number

01 Overload Error No Data (840A V1 & V2 only) #5,01,\r - Overload error

02 DC Offset Error No Data (840A V1 & V2 only) #5,02,\r - DC offset error

03 Over Temperature Error No Data (840A V1 & V2 only) #5,03,\r - Over temperature error

04 Clipping Error No Data (840A V1 & V2 only) #5,04,\r - Clipping error

05 Mains Fail No Data (840A V1 & V2 only) #5,05,\r - Mains failed

06 Speaker Fail No Data (840A V1 & V2 only) #5,06,\r - Speaker failed

07 Command Group Unknown No Data #5,07,\r - Command error

08 Command Number in Group

Unknown No Data #5,08,\r - Command error

09 Command Data Error No Data #5,09,\r - Data error

Information in this document has been carefully checked for accuracy; however, Cambridge Audio's policy is one of continuous improvement, therefore design and specifications are subject to

change without prior notice. If you notice any errors please feel free to email us at: support@cambridgeaudio.com

This document contains proprietary information protected by copyright. All rights are reserved. No part of this document may be reproduced by any mechanical, electronic or other means, in

any form, without prior written permission of the manufacturer.

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