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Configure Scan List (G Dataflow)

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Last Modified: January 17, 2018

Configures the scan list and scan mode used for scanning.

The scan list is comprised of a list of channel connections separated by semicolons. For example, the following scan list will scan the first three channels of a multiplexer:

com0>ch0; com0>ch1; com0>ch2;

Programming Patterns

To see the status of the scan, call either the niSwitch Switch Is Scanning node or the niSwitch Wait For Scan To Complete node. Use the niSwitch Configure Scan Trigger node to configure the scan trigger, and the niSwitch Initiate Scan node to start the scan.

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session in

Control that identifies a particular NI-SWITCH session established with the niSwitch Initialize With Topology node, the niSwitch Initialize With Options node, or the niSwitch Initialize node.

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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

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scan list

Scan list to use. NI-SWITCH uses this value to set the Scan List property.

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scan mode

Control that specifies how the switch module breaks existing connections when scanning. NI-SWITCH uses this value to set the Scan Mode property.

Default: Break Before Make

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session out

Indicator that identifies a particular NI-SWITCH session established with the niSwitch Initialize With Topology node, the niSwitch Initialize With Options node, or the niSwitch Initialize node and used for all subsequent NI-SWITCH calls.

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error out

Error information.

The node produces this output 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.

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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