Integra MZA-4.7 instruction manual RS232 Protocol, Data

RS232 Protocol—Continued

Data

Command	Content
Standby	00	– Standby OFF
(01)	01	– Standby ON
	04	– Toggle
Mute	00	– Mute
(02)	01	– Un-mute
	02	– Toggle Mute
Source Selection	00	– S5
(03)	01	– S6
	02	– S7
	03	– S4
	04	– S8
	05	– S1
	06	– S2
	07	– S3
Volume	00	– A0 range
(04)
Bass	F4 – 0C (–12dB - +12dB)
(05)
Treble	F4 – 0C (–12dB - +12dB)
(06)
Balance	EC – 14 (Left –20dB - Right –20dB)
(07)
Send all parameters	XX – value ignored
(09)
Amplifier features	00	– Loudness disabled
(0C)	01	– Loudness enabled
Maximum Volume Limit	00	– A0 range
(0D)
Link Zone	00	– 31 zone to be linked
(0F)	FF – for no zone linking
Volume Up	XX – value ignored
(11)
Volume Down	XX – value ignored
(12)
Zone Name	Data field contains the ASCII string
(1C)
Preamplifier Volume Mode	00	– A0 range
(1D)	FF = Independent mode.
Preset Selection	All Zone function: Zone byte = FF
(1E)	00	– Default : exit preset mode
	01	– Force “Page Preset”
	02	– Select Preset 1
	03	– Select Preset 2
	04	– Select Preset 3
	05	– Select Preset 4
	06	– Select Preset 5
	07	– Select Preset 6
Volume BCD Format	0 – 99 in BCD format same as Front Panel display
(26)

Notes:

■Commands are used as notifications. If an amplifier is switched ON, it will notify the other devices on the control bus by sending the Standby command (01). Any amplifiers with the same zone will take the notification as a command and also switch ON.

■When a command is sent to an amplifier it will first be transmitted on the control bus and then returned to the PC (Home automation system). If an error occurs an error will be returned instead of the original command. The PC

(Home automation system) needs to ignore its command when it is returned.

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