Can the NI 9401 be Configured for Bidirectional Digital Signals? Hardware: CompactRIO>>Digital Input Modules>>NI 9401
Problem: I know that the NI 9401 has eight digital lines. Can this module be used for counter inputs, digital inputs and digital outputs simultaneously? Solution: The 9401 can be configured for directional line measurements by four-bit nibble. Each group of four channels (channels 0-3 and channels 4-7) must be configured to either input or output. All channels may be input, all may be output, or one nibble may be input with the other nibble set to output. When used in a CompactDAQ 9172 chassis, you can use counter inputs with a nibble set to input and counter outputs with a nibble set to output. When used in a CompactRIO chassis, you can specify in your custom FPGA design what logic should be applied. Related Links: Using Internal Counters on a NI cDAQ-9172 as a Sample Clock for Other Tasks Attachments:
Report Date: 07/20/2007 Last Updated: 11/17/2007 Document ID: 4BJH11Q9 |
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