Danfoss VLT AutomationDrive FC 300 Series - Page 197

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.
10.12.3 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.
Actual output
freq.
STW
Slave-master
Speed ref.CTW
Master-slave
16bit
130BA276.10
Illustration 10.17 Actual Output Frequency (MAV)
The reference and MAV are scaled as follows:
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 10.18 Reference and MAV
RS-485 Installation and Set...
VLT
®
AutomationDrive FC 300 Design Guide, 0.25-75 kW
MG33BE02 - VLT
®
is a registered Danfoss trademark 195
10
10
RSPSupply - 1-888-532-2706 - www.RSPSupply.com
http://www.RSPSupply.com/p-21462-Danfoss-131B8966-VLT-Automation-VT-Drive-VFD-FC301-230V-5-HP.aspx