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What does Suffix S385 mean on the ATV312 drives?
Altivar ATV312 with S385 suffix only
OEM special with suffix S385
Suffix Version S385 version of the ATV312 is restricted to the OEM Automatic systems.
The S385 means its s specific version. The ATV312 S385 version has 16khz of PWM frequency allowed for all speeds.
Also some of the factory default settings are not same as the standard drive.