VLT
®
FCD Series
ously. During programming, all the information
required for quick, efficient parameter Setup of the
frequency converter is displayed. As a supplement
to the display, the LCP has three indicator lamps for
voltage (ON), warning (WARNING) and alarm
(ALARM). Most of the frequency converter’s parame-
ter Setups can be changed immediately via the LCP
control panel. See also the section entitled The LCP
control unit in the Design Guide.
■ Fieldbus protocols
Danfoss frequency converters are able to fulfill many
different functions in a process control system. The
frequency converter can be integrated directly in an
overall surveillance system, which will allow detailed
process data to be transferred via serial communica-
tion.
The protocols listed below are based on an RS 485
bus system with a maximum transmission speed of
9600 baud. The following telegram profiles are sup-
ported as standard:
- FC protocol, which is a profile adapted to Dan-
foss.
- Profidrive protocol, which supports the profidrive
profile
See Serial communication for FCD 300 for further
details of telegram profiles.
■ Fieldbus option
The increasing information requirements in industry
make it necessary to collect or visualize many differ-
ent process data. Important process data help the
system technician with the daily monitoring of the
system. The large amounts of data involved in major
systems make a higher transmission speed than
9600 baud desirable.
Profibus is a fieldbus system, which can be used for
linking automation devices such as sensors and
actuators with the controls by means of a two-
conductor cable.
Profibus DP is a very fast communication protocol,
made specially for communication between the au-
tomation system and various types of equipment.
Danfoss FCD 300 can be supplied with the Profibus
®
DP in a 3 mbit and a 12 mbit version. Units with
Profibus protocol can either be controlled by FC pro-
tocol or Profidrive protocol.
Profibus is a registered trade mark.
MG.04.A1.02 - VLT is a registered Danfoss trade mark
9
Introduction to FCD 300
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