Bus Speed Reference Value - Danfoss VLT FC51 Design Manual

RS-485 Installation and Set...
Bit 08, Speed≠ reference/speed=reference
Bit 08='0': The motor is running but the present speed is
different from the preset speed reference. It might for
example, be the case when the speed ramps up/down
during start/stop.
Bit 08='1': The motor speed matches the preset speed
reference.
Bit 09, Local operation/bus control
Bit 09='0': [Off/Reset] is activate on the control unit or
Local control in 3-13 Reference Site is selected. It is not
possible to control the frequency converter via serial
communication.
Bit 09='1' It is possible to control the frequency converter
via the fieldbus/serial communication.
Bit 10, Out of frequency limit
Bit 10='0': The output frequency has reached the value in
4-12 Motor Speed Low Limit [Hz] or 4-14 Motor Speed High
Limit [Hz].
Bit 10="1": The output frequency is within the defined
limits.
8 8
Bit 11, No operation/in operation
Bit 11='0': The motor is not running.
Bit 11='1': The coasting has a start signal or the output
frequency is greater than 0 Hz.
Bit 12, Drive OK/stopped, autostart
Bit 12='0': There is no temporary over temperature on the
inverter.
Bit 12='1': The inverter stops because of over temperature
but the unit does not trip and resumes operation once the
over temperature stops.
Bit 13, Voltage OK/limit exceeded
Bit 13='0': There are no voltage warnings.
Bit 13='1': The DC voltage in the frequency converter's
intermediate circuit is too low or too high.
Bit 14, Torque OK/limit exceeded
Bit 14='0': The motor current is lower than the torque limit
selected in 4-18 Current Limit.
Bit 14='1': The torque limit in 4-18 Current Limit is
exceeded.
Bit 15, Timer OK/limit exceeded
Bit 15='0': The timers for motor thermal protection and
thermal protection are not exceeded 100%.
Bit 15='1': One of the timers exceeds 100%.
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VLT Micro Drive FC 51 Design Guide

8.11.3 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.
Master-follower
CTW
Follower-master
STW
Illustration 8.16 Actual Output Frequency (MAV)
The reference and MAV are scaled as follows:
Par.3-00 set to
(1) -max- +max
Par.3-00 set to
(0) min-max
Illustration 8.17 Reference and MAV
MG02K302 - Rev. 2013-12-03
16bit
Speed ref.
Actual output
freq.
-100% 0%
(C000hex) (0hex)
Reverse
Par.3-03 0
Max reference
0%
(0hex)
Par.3-02
Min reference
100%
(4000hex)
Forward
Par.3-03
Max reference
100%
(4000hex)
Forward
Par.3-03
Max reference