GE AF-600 FP Design Manual page 133

AF-600 FP Design Guide
6.11.3 Bus Speed Reference Value
Speed reference value is transmitted to the frequency converter in a relative
value in %. The value is transmitted in the form of a 16-bit word; in integers
(0-32767) the value 16384 (4000 Hex) corresponds to 100%. Negative figures
are formatted by means of 2's complement. The Actual Output frequency
(MAV) is scaled in the same way as the bus reference.
The reference and MAV are scaled as follows:
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