Modular Data Acquisition
Distributed Measurement and Control
High-Performance Test
Automated Test System Development Software
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Provides support for NI data acquisition and signal conditioning devices.
Provides support for Ethernet, GPIB, serial, USB, and other types of instruments.
Provides support for NI GPIB controllers and NI embedded controllers with GPIB ports.
08-08-2005 04:05 AM
08-08-2005 10:06 AM
08-09-2005 03:25 AM
08-09-2005 09:28 AM
Are you using the default settings for the Modbus object? Also make sure that the serial cable is a straight one (as opposed to a null-modem one).
-Khalid
08-09-2005 09:50 AM
yes using the default settings for the Modbus object
08-10-2005 01:36 AM - last edited on 11-11-2025 11:02 AM by Content Cleaner
Are you using a staright-through serial cable? Can you verify that the COM port itself is functioning correctly. You can do this by doing the "loopback" test:
https://knowledge.ni.com/KnowledgeArticleDetails?id=kA03q000000YFtECAW&l=en-US
Hope this helps,
