Measurement Computing DAQFlex User Guide - Manual (Page 31)

31
Chapter 4
DAQFlex Message Reference
The software messages that you send to a DAQFlex supported device are text-based commands. Each
message pertains to a specific DAQ component. A DAQ component is a device element that
encapsulates a DAQ subsystem which has multiple properties or commands associated with it.
DAQFlex components
A DAQ component is a device element that encapsulates a DAQ subsystem which has multiple
properties or commands associated with it. The DAQFlex API defines the following DAQ components:
 DEV — encapsulates device-level operations
 AI — encapsulates single-point analog input operations
 AICAL — encapsulates analog input self-calibration
 AIQUEUE — encapsulates analog input gain queue operations
 AISCAN — encapsulates analog input scanning operations
 AITRIG — encapsulates analog input triggering operations
 AO — encapsulates single-point analog output operations
 AOCAL — encapsulates analog output self-calibration
 AOSCAN — encapsulates analog output scanning operations
 AOTRIG — encapsulates analog output triggering operations
 DIO — encapsulates digital I/O operations
 CTR — encapsulates counter input operations
 TMR — encapsulates timer output operations
Each component has one or more properties associated with it. Each property supports one or more
text-based commands, or messages. These messages are used to communicate with DAQFlex-
supported hardware.
DAQFlex supports two types of messages:
 Device programming messages configure or retrieve a device property value.
 Device reflection messages retrieve information about a device capability, such as the maximum
scan rate or support for an external clock.