Bus Speed Reference Value - Danfoss FC 102 Design Manual

Installation and Set-up
Bit 04, No error/error (no trip)
Bit 04 = '0': The frequency converter is not in fault mode.
Bit 04 = "1": The frequency converter shows an error but
does not trip.
Bit 05, Not used
Bit 05 is not used in the status word.
Bit 06, No error/triplock
Bit 06 = '0': The frequency converter is not in fault mode.
Bit 06 = "1": The frequency converter is tripped and locked.
Bit 07, No warning/warning
Bit 07 = '0': There are no warnings. Bit 07 = '1': A warning
has occurred.
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 e.g. 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
8 8
Bit 09 = '0': [STOP/RESET] is activated on the control unit
or Local control in 3-13 Reference Site is selected. Control
via serial communication is not possible. 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
4-11 Motor Speed Low Limit [RPM] or 4-13 Motor Speed High
Limit [RPM]. Bit 10 = "1": The output frequency is within
the defined limits.
Bit 11, No operation/in operation
Bit 11 = '0': The motor is not running. Bit 11 = '1': The
frequency converter 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 overtemperature on the
inverter. Bit 12 = '1': The inverter stops because of
overtemperature, but the unit does not trip and resumes
operation once the overtemperature 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%.
All bits in the STW are set to '0' if the connection between
the Interbus option and the frequency converter is lost, or
an internal communication problem has occurred.
146
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
Follower-master
Illustration 8.18 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 8.19 Reference and MAV
Danfoss A/S © Rev. 06/2014 All rights reserved.
16bit
CTW Speed ref.
Actual output
STW
freq.
-100% 0%
(C000hex) (0hex)
Reverse
Par.3-03 0
Max reference
Par.3-02
Min reference
100%
(4000hex)
Forward
Par.3-03
Max reference
0% 100%
(0hex) (4000hex)
Forward
Par.3-03
Max reference
MG11BC02