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NXC-VOL4 Volume Control Card
39
NetLinx Cardframe, Control Cards, and NetModules
NXC-VOL4 Channel Assignments
The NXC- VOL4 channel assignments are listed in the following table. This card has 2 ports with 2 audio
"channels" in each port. The two audio "channels", which can be used as right and left, should not be confused
with the
channel
assignments
, which are sent to and from the card.
Ramping a volume channel while the mute channel is on will not automatically turn off the mute channel but
the ramping will still occur; the volume change will be noticed when the mute channel is turned off. For setting
ramp rates and presets, refer to the
Programming Information
section on page 40.
NXC-VOL4 Levels
Volume (audio) channels 1 and 2 use levels 1 and 2 respectively. For reading current volume levels and
displaying bargraphs see
CREATE_LEVEL
and
SEND_LEVEL
. The two levels associated with each port of the
NXC-VOL4 Control Card are listed in the table below:
CREATE_LEVEL
This keyword creates an association between a specified level of a device and a variable that will contain the
value of the level.
This can only appear in the DEFINE_START section of the program.
CREATE_LEVEL DEV, Level, Value
Parameters:
DEV: The device from which to read the level.
Level: The level of the device to read.
Value: Variable in which to store the level value.
DevLev: A DEVLEV structure.
Value: Variable in which to store the level value CREATE_LEVEL DevLev, Value.
During execution of the program, NetLinx continuously updates the variable to match the level that it
represents.
NXC-VOL4 Channel Assignments (per port)
Port 1
Channel:
Port 2
Channel:
Description
1
1
While channel is on, ramps the volume on audio channels 1 and 2 up (increase).
2
2
While channel is on, ramps the volume on audio channels 1 and 2 down (decrease).
3
3
While channel is on, the volume on audio channels 1 and 2 are muted (lowest
volume); when channel is off, the volume levels are restored to their previous levels.
4
4
While channel is on, ramps the volume on audio channel 1 up (increase).
5
5
While channel is on, ramps the volume on audio channel 1 down (decrease).
6
6
While channel is on, the volume on audio channel 1 is muted (lowest volume); when
channel is off, the volume level is restored.
7
7
While channel is on, ramps the volume for audio channel 2 up (increase).
8
8
While channel is on, ramps the volume for audio channel 2 down (decrease).
9
9
While channel is on, volume for audio channel 2 is muted (lowest volume); when
channel is off, the volume level is restored.
NXC-VOL4 Levels
Port 1
Port 2
Level
Description
Level
Description
1
Output #1
1
Output #3
2
Output #2
2
Output #4
Summary of Contents for NetLinx NXC-COM2
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Page 32: ...NXC IRS4 4 Port IR S Control Card 24 NetLinx Cardframe Control Cards and NetModules...
Page 49: ...NXC VOL4 Volume Control Card 41 Enter the Document Name Here...