11.11.3 Bus Speed Reference Value
Speed reference value is transmitted to the drive 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 gures are formatted with 2’s
complement. The actual output frequency (MAV) is scaled in the same way as the bus reference.
Actual output
frequency
STW
Follower-slave
Speed referenceCTW
Master-slave
16bit
130BA276.11
Illustration 11.18 Bus Speed Reference Value
The reference and MAV are scaled as shown in Illustration 11.19.
Reverse Forward
Par.3-00 set to
(1) -max- +max
Max reference Max reference
Par.3-00 set to
(0) min-max
Max reference
Forward
Min reference
100%
(4000hex)
-100%
(C000hex)
0%
(0hex)
Par.3-03 0 Par.3-03
Par.3-03
(4000hex)(0hex)
0% 100%
Par.3-02
130BA277.10
Illustration 11.19 Reference and MAV
Appendix Design Guide
MG06K102 Danfoss A/S © 03/2019 All rights reserved. 91
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