User Guide

NXC-VOL4 Volume Control Card

NXF CardFrame, NetLinx Control Cards, and NetModules

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.

SEND_LEVEL

This keyword sends a value to a specific level on a NetLinx device/port. The syntax follows any one

of the four following examples:

SEND_LEVEL DEV, Level, Value

SEND_LEVEL DEV[ ], Level, Value

SEND_LEVEL DEVLEV, Value

SEND_LEVEL DEVLEV[ ], Value

Parameters:

 DEV: Device containing the specified level

 Level: Number of the level to receive the new value

 Value: New level value

 DEV[ ]: Device array (each device contains the specified level)

 DEVLEV: Device-level to receive the new value

 DL[ ]: Device-level array (each will receive the new value)

NXC-VOL4 Levels

Port 1 Port 2

Level Description Level Description

1 Output #1 1 Output #3

2 Output #2 2 Output #4