Rounding error under code C0038 and C0039

Which products are affected?

EVF9300EV Software V1.0, V1.1, V2.1

How does the reaction look like?

When entering specific speed values under code C0038 or C0039 via Global Drive Control the input value in the input window changes on its own initiative in the background by several thousandth digits altough only integers are allowed.

Moreover, when comparing controller parameters with default setting via Global Drive Control a deviation under code C0039 Subcode 2 is diplayed although the parmeter has not been modified.

Under code C0038 and C0039 the integer (speed in rpm) is not rounded correctly with some values in the controller (e.g. 1000 rpm changes to 1000,0001 rpm).

When does the problem occur?

When comparing the parameters GDC detects a deviation to the integer. The corresponding codes are listed.

Possible diagnostics?

- not relevant -

Short-term measures/recommendations?

The deviation (1000 rpm / 1000 rpm) displayed is to be ignored.

URL for linking this AKB article: https://www.lenze.com/en-de/go/akb/20010007/1/
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