Danfoss VLT HVAC Basic Drive FC 100 Series Design Manual page 81

RS-485 Installation and Set...
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.
7.11.3 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-slave
7 7
CTW
Slave-master
STW
The reference and MAV are scaled as follows:
Par.3-00 set to
(1) -max- +max
Par.3-00 set to
(0) min-max
80
VLT HVAC Basic Drive Design Guide
16bit
Speed ref.
Actual output
freq.
-100%
(C000hex)
Reverse
Par.3-03
Max reference
®
MG.18.C2.02 - VLT
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.
0%
(0hex)
Forward
0
0%
(0hex)
Forward
Par.3-02
Min reference
is a registered Danfoss trademark
100%
(4000hex)
Par.3-03
Max reference
100%
(4000hex)
Par.3-03
Max reference