niSwitch Get Relay Count VI

NI Switches Help

Edition Date: April 2015

Part Number: 375472H-01

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Returns the number of times the relay has changed from Closed to Open. Relay count is useful for tracking relay life and use. Call the niSwitch Wait For Debounce VI before this VI to ensure an accurate count.

Refer to Relay Count to determine if the switch module supports relay counting.

Related Topic

niSwitch Get Relay Count

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instrument handle identifies a particular NI-SWITCH session established with the niSwitch Initialize With Topology VI, the niSwitch Initialize With Options VI, or the niSwitch Initialize VI.

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relay names is the name of the relay or set of relays to control. You can supply a single relay name or comma-delimited list of relay names to control these relays.

Examples of valid relay names are ch0, ab0, 1wire, and hlselect.

Refer to Devices for a list of valid relay names for the switch module.

Note   Use the niSwitch Wait For Debounce VI, the niSwitch Switch Is Debounced VI, and the Is Debounced property to determine if the relay has settled.
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error in describes error conditions that occur before this node runs. This input provides standard error in functionality.

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status is TRUE (X) if an error occurred before this VI ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI ran. The default is FALSE.

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code is the error or warning code. The default is 0. If status is TRUE, code is a non-zero error code. If status is FALSE, code is 0 or a warning code.

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source describes the origin of the error or warning and is, in most cases, the name of the VI that produced the error or warning. The default is an empty string.

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instrument handle out identifies a particular NI-SWITCH session established with the niSwitch Initialize With Topology VI, the niSwitch Initialize With Options VI, or the niSwitch Initialize VI and used for all subsequent NI-SWITCH calls.

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count is the number of relay cycles.

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error out contains error information. This output provides standard error out functionality.

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status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred.

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code is the error or warning code. If status is TRUE, code is a non-zero error code. If status is FALSE, code is 0 or a warning code.

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source describes the origin of the error or warning and is, in most cases, the name of the VI that produced the error or warning.

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