ABB DriveIT ACH550-01 User Manual page 161

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ACH550 User's Manual

Reference handling. The control of rotation direction is

configured for each control location (EXT1 and EXT2) using the

parameters in group 10. Fieldbus references are bipolar, i.e.

they can be negative or positive. The following diagrams

illustrate how group 10 parameters and the sign of the fieldbus

reference interact to produce the reference REF1/REF2.

Serial communications

AI reference scaling

COMM [%] * (AI [%] / 0,5 * REF2 MAX [%])

Fieldbus Reference

Correction Coefficient

*Direction determined by the sign of

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