How to activate or deactivate the mute lines on designated zones?

To activate or deactivate mute lines, use the command sequence '0x21 0x01 0x1F', followed by the appropriate response sequence.

How to report the amplifier temperature status?

To request the temperature status of a specific zone, use the command '0x21 0x01 0x27' along with the designated zone number. The response sequence will provide the temperature status.

What is the purpose of the 'Cc' byte in the command sequence?

The 'Cc' byte in the command sequence specifies the specific function being requested, such as activating or deactivating the mute lines or reporting amplifier temperature status.

Activate/deactivate the mute lines 0x1F

Activate/deactivate the mute lines (0x1F)

Activate/deactivate the mute lines on the designated zone.

Example

Command/response sequence to activate the mute relays:

Command:	0x21 0x01 0x1F	0x01	0x0D
Response:	0x21 0x01 0x1F	0x00	0x01 0x0D

COMMAND:

Byte:	Description:
St	0x21
Zn	Zone number
Cc	0x1F
Data1	0x00	– Deactivate mute line
	0x01	– Activate mute line
Dl	0x01
Et	0x0D
RESPONSE:
Byte:	Description:
St	0x21
Zn	Zone number
Cc	0x1F
Ac	Answer code
Dl	Data length <n>
Data1	Relay state
Et	0x0D

Report Amplifer temperature status (0x27)

Report the temperature status of the various zones amplifiers.

Example

Command/response sequence to request the temperature of zone 1 where temperature is too high:

Command:	0x21 0x01 0x27	0x01	0xF0 0x0D
Response:	0x21 0x01 0x27	0x00	0x01 0x01 0x0D

Note: As each amplifier powers a pair of zones (1&2, 3&4 , 5&6) the temperature status of zones 1 and 2 is the same value.