PCI Express Boards Configuring Intelligent RS-485
3. Check the Auto Enumerating COM Number option to map subsequent ports automatically. The port
numbers will be assigned in sequence. Select Interface (RS-232, RS-422, RS-485-2W, or RS-485-4W)
from the drop-down box. Click Save to save the settings.
Auto Tuning function is provided with RS-485-2W.
4. Click Save on the Ports Configuration page to save the settings.
5. Test if the communication is OK. If it’s not OK, proceed to Step 6.
6. Click on the COM Number, click Auto Tuning next, and then click OK.
The PCIe board will automatically detect the RS-485 environment and suggest the correct Bias Resistor
and Termination Resistor. Click OK to save the setting. To apply the setting, you need to click Save on
the thevPorts Configuration page.
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