Arria10 SXでCritical Warning (17951)、(18655)を消す方法はありますでしょうか。

Well, these warnings are generated because there are unused transceiver RX channels in the device and is a normal warning message.

Unused transceiver TX channels in your Arria® 10 device may degrade over time when using the Quartus® Prime software version 16.0 and earlier.

The Quartus Prime software generates a warning message if your design contains unused transceiver channels. The warning message states that performance of unused channels may degrade over time if not properly preserved with the following Quartus Settings File (QSF) assignments.

Global Assignment

set_global_assignment -name PRESERVE_UNUSED_XCVR_CHANNEL ON

Pin Specific Assignment

set_instance_assignment -name PRESERVE_UNUSED_XCVR_CHANNEL ON -to pin_name

In the Quartus Prime software version 16.0 and earlier, the QSF assignment only preserved the unused receiver channel and did not properly preserve the unused transmitter channel.

You can also try the following to remove the warning:

Eliminate the warning by performing one of the following options:

1. Enable unused rx clock workaround. In your QSF file, insert the following assignment:

set_global_assignment -name ENABLE_UNUSED_RX_CLOCK_WORKAROUND ON

2. Disable the warning (do this only if you are certain that you will not use other transceiver channels in your design). In your QSF file, insert the following assignment:

set_global_assignment -name MESSAGE_DISABLE <message_id>

These warnings are normal