Danfoss FC 300 Design Manual page 249

FC 300 Design Guide 11 RS-485 Installation and Set-up
11.10.3 Bus Speed Reference Value
Speed reference value is transmitted to the frequency converter in a rel-
ative 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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11.10.4 PROFIdrive Control Profile
This section describes the functionality of the control word and status word in the PROFIdrive profile. Select this profile by setting par. 8-10 Control Word
Profile
.
11.10.5 Control Word according to PROFIdrive Profile (CTW)
The Control word is used to send commands from a master (e.g. a PC)
to a slave.
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