niScope_SetAttributeViSession

C Function Prototype

ViStatus niScope_SetAttributeViSession (ViSession vi, ViConstString channelList, ViAttr attributeID, ViSession value);

Purpose

Sets the value of a ViSession attribute. This is a low-level function that you can use to set the values of instrument-specific attributes and inherent IVI attributes. If the attribute represents an instrument state, this function performs instrument I/O in the following cases:

• State caching is disabled for the entire session or for the particular attribute.
• State caching is enabled and the currently cached value is invalid or is different than the value you specify.

Note  NI-SCOPE contains high-level functions that set most of the instrument attributes. Use the high-level driver functions as much as possible because they handle order dependencies and multithread locking for you. In addition, the high-level functions perform status checking only after setting all of the attributes. In contrast, when you set multiple attributes using the Set Attribute functions, the functions check the instrument status after each call. Also, when state caching is enabled, the high-level functions that configure multiple attributes perform instrument I/O only for the attributes whose value you change. Thus, you can safely call the high-level functions without the penalty of redundant instrument I/O.

Parameters

Return Value