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You can use this polymorphic VI to read an array of data from the shared memory of the RT target running on the RTX subsystem. You must wire RTRTX::0 to the device input of the RT Incremental Single Read VI to specify the RT target on the RTX subsystem. The VI reads a start value before the data in memory on the first iteration, reads the data in 16-bit halves for two iterations, and then reads the end value after the data in memory on the last iteration, thus requiring four iterations to read each element of the data array. Details  

	device is the name of the RTX subsystem (for example, RTRTX::0). The default is RT::0.
	byte offset is the location in memory to start reading data.
	previous data is the previous data read from shared memory.
	error in describes error conditions that occur before this VI or function runs. The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. This VI or function runs normally only if no error occurred before this VI or function runs. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node. status is TRUE (X) if an error occurred before this VI or function ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI or function ran. The default is FALSE. code is the error or warning code. The default is 0. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source specifies the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.
	device out is the name of the RTX subsystem.
	next byte offset is the location in shared memory to read during the next iteration of this VI.
	data is an array of data. It is the same as previous data if the VI has not finished reading a new element from shared memory. If the VI has finished reading a new element, it is the same as previous data but with the new element replacing the old element.
	error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function produces. Right-click the error out front panel indicator and select Explain Error from the shortcut menu for more information about the error. status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred. code is the error or warning code. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning.

RT Incremental Single Read Details

Use this VI in applications that run in continuous loops requiring a fast loop speed.

Note  This VI reads data written to shared memory by the RT Incremental Single Write VI. The RT Incremental Single Write VI does not write new data if you have not read previous values with the RT Incremental Single Read VI, which results in lost data points.