Initialize With Channels (G Dataflow)

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Last Modified: July 24, 2019

Creates and returns a new NI-FGEN session to the specified channel of a waveform generator that is used in all subsequent NI-FGEN calls.

Optionally sets the initial state of session properties Range Check, Cache, Simulate, Query Instrument Status, and Record Coercions.

Inputs/Outputs
Compatibility

option string

Initial values of certain session properties.

If you do not specify one of these properties, the default value is used.

Property Name	Property Defined Constant
Simulate	Instrument:Inherent IVI Attributes:User Options:Simulate
RangeCheck	Instrument:Inherent IVI Attributes:User Options:Range Check
Cache	Instrument:Inherent IVI Attributes:User Options:Cache
QueryInstrStatus	Instrument:Inherent IVI Attributes:User Options:Query Instrument Status

option string Syntax

option string uses the following syntax: attributeName=value

where attributeName is the name of the attribute, and value is the value to which the attribute is set.

To set multiple properties, separate them with a comma.

If simulation is enabled (Simulate=1), you can specify the waveform generator that you want to simulate by entering the following syntax in option string:

DriverSetup=Model:< driver model number >;BoardType:< module type >;MemorySize:< size of onboard memory in bytes >

When you configure multichannel waveform generators, option string specifies which channels to initialize. Valid values include channel ranges (for example, "Channels:0-1") and individual channels (for example, "Channels:1").

Table 1. option string Syntax Examples

Waveform Generator Model	option string Syntax
PXI-5404	Simulate=1,DriverSetup=Model:5404;BoardType:PXI
PCI-5421	Simulate=1,DriverSetup=Model:5421;BoardType:PCI;MemorySize:268435456
PXIe-5450	Simulate=1,DriverSetup=Model:5450;Channels:0-1;BoardType:PXIe;MemorySize:268435456

Default: Simulate = False (0), RangeCheck = True (1), Cache = True (1), QueryInstrStatus = True (1)

resource name

The instrument name. For example, "PXI1Slot3," where "PXI1Slot3" is an instrument name assigned by Measurement & Automation Explorer (MAX).

You can wire in the name of an IVI logical name or an IVI virtual name configured with the IVI Configuration utility. A logical name identifies a particular virtual instrument. A virtual name identifies a specific instrument and specifies the initial settings for the session.

All IVI names, such as logical names, are case-sensitive. If you use logical names, driver session names, or virtual names in your program, you must ensure that the name you use matches the name in the IVI Configuration Store file exactly, without any variations in the case of the characters.

error in

Error conditions that occur before this node runs.

The node responds to this input according to standard error behavior.

Standard Error Behavior

Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

error in does not contain an error	error in contains an error

If no error occurred before the node runs, the node begins execution normally. If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.	If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

Default: No error

channel name

Name of the waveform generator channel that the node uses.

reset device

Boolean value that specifies whether or not to reset the waveform generator during the initialization procedure.

True	The waveform generator resets to a known state.
False	The waveform generator does not reset.

This input performs the same function as Reset.

Default: False

session out

Reference to your instrument session to wire to the next node.

error out

Error information.

The node produces this output according to standard error behavior.

Standard Error Behavior

error in does not contain an error	error in contains an error

If no error occurred before the node runs, the node begins execution normally. If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.	If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

Where This Node Can Run:

Desktop OS: Windows

FPGA: Not supported

Web Server: Not supported in VIs that run in a web application

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