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Eurotherm 2604 and 3204 RS485 via COM ports of NI PCIe-8433/2 card

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Greetings,

I use 2 Eurotherm regulators at work (model 2604 and 3204) with connections via RS-485 interface to a PC.

Now, on the first PC (with Win XP installed and cables connected directly to the COM ports of the MOXA CP-132 PCI card) I ran iTools and, after a scan, the Eurotherm devices were detected without a problem, all parameters listed.

On the other hand, the second PC has Windows 10 and a National Instruments PCIe-8433/2 card with NI Serial 17.5 drivers up-to-date. Here, after physical connection and running iTools, the scan doesn't come up with anything although the addresses are known.

Ultimately, the goal is to write and run LabVIEW executables on the second PC. Modbus will be the used communication protocol. After running NI-VISA Interactive Control -> Input/Output -> Read, one of the COM ports shows timeout error and the other one: a framing error during transfer.

 

I'm relatively new with this, so could anyone drop some suggestions on how to proceed or provide some diagnostics tools?

Regards,
Marcin


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