Mitsubishi Electric · MELSEC iQ-R Motion Controller
This warning occurs when the speed for a synchronous encoder axis exceeds its defined monitor range. This indicates that the input pulse from the synchronous encoder might be too high or the system's monitoring parameters are too sensitive for the actual operating speed, potentially leading to instability.
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Use a smaller number of decimal places for the speed setting in "[Pr.321] Synchronous encoder axis unit setting".
Set the speed time units to "s" in "[Pr.321] Synchronous encoder axis unit setting".
Monitor the actual synchronous encoder axis speed using "[Md.322] Synchronous encoder axis speed (R: D38564+32n, D38565+32n/Q: D13244+20n, D13245+20n)" to confirm if the speed is indeed exceeding the expected range.
Review and adjust the monitor range setting for the synchronous encoder axis (Refer to Section 4.3.1) if the operating speed is legitimate for the application.