Configuring An Analogue Input As Volume Control - ASL INTERCOM VAR4 Operation Manual

16.2.3

Configuring an Analogue Input as Volume Control

The application of the Volume Control function is to allow remote control of the volume of specific input
sources within a specific zone or zones. Normally the volume control will be mounted within the zone and
allow the control of the specific sources, typically music sources, within the zone, while leaving the volume of
all other sources unaffected.
As such it is possible to assign a particular Volume Control to be associated with one, or any group of, VAR
Router outputs.
That having been done it is then possible to assign which input, or group of inputs, are controlled.
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Volume Controls provide 12 steps of attenuation. 33dB of control is provided from positions
'1' to '11' fixed at 3dB per step with '0' providing an 'off' position, i.e., the Volume Control
first position sets the volume of the associated output(s) to maximum.
•
In the event of a fault (connection failure to the Volume Control or RS485 communications
failure to the Remote I/O unit), the volume defaults to 'off'.
It is possible to configure more than one Volume Control for the same output, provided the
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inputs they govern are unique.
In order to configure an analogue input as Volume Control proceed as follows.
1. Select Configuration System Router Control Remote.
2. Move to scroll the Remote I/O unit list until the required unit is displayed:
[Remote I/O unit=n] Not Configured
Default value:
Possible I/O units:
3. Move to, and select the Analogue menu item.
[Analogue] Digital In
4. Scroll the analogue input list and select the required input:
[Analogue channel=nn]
Default value:
Possible I/O units:
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Make sure the selected analogue input is to be configured as 'Volume Control. Once
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the 'Volume' menu item is selected, it will be assigned to the analogue input and the
previous configuration will be lost.
•
The currently assigned configuration is displayed in upper-case letters.
VAR4 / VAR12 / VAR20 - Operation Manual
'Remote I/O unit=1'
1 to 3 for VAR4
1 to 6 for VAR12
1 to 9 for VAR20
Digital Out
'Analogue channel=1'
1 to 12
Is sue: 03 complete, approved
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