How Do I Adjust the Analog Input Rate of My FieldPoint Modules?Hardware: Compact FieldPoint>>Analog I/O Modules, FieldPoint>>Analog I/O Modules
Problem: Using the Measurement and Automation Explorer (MAX), I do not see how to set the sample rate for my Analog Input module. How can I program the sample rate? Solution: Within the Real-Time application to run on the [c]FP controller, place the FP Read VI within a timed loop and set the period of the loop to the desired sampling frequency. The limitation of the sampling rate is the same as the limitations of the module. (Details can be found in the manual for the specific module.)  For example, the all-channel sample rate of the cFP-AI-118 is 10.42 kHz with no filtering. If filtering is enabled on any channel, the all-channel sample rate is 3.45 kHz (This information is available in operating instructions for the module). Thus a FieldPoint Read within a loop that executes approximately once every .28 milliseconds will reach the maximum frequency for sampling off the cFP-AI-118 module. Related Links: KnowledgeBase 2T8APBP6: Can I Disable the Filter on the [c]FP-AI-110, [c]FP-AI-111, or [c]FP-SG-140? Attachments:
Report Date: 03/15/2006 Last Updated: 09/16/2008 Document ID: 3VEBLMQW |
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
