Danfoss VLT FC 103 Operating Instructions Manual page 34

Start Up and Functional Tes...
N N OTE
Internal/Closed loop: The FC 103 will control the
application directly using the internal PID control within
the frequency converter and needs an input from an
external input such as a temperature or other sensor which
is wired directly into the frequency converter and controls
from the sensor signal.
External/Open loop: The FC 103 takes its control signal
from another controller (such as a pack controller) which
3 3
gives the frequency converter e.g. 0-10 V, 4-20 mA or FC
103 Lon. The frequency converter will change its speed
depending upon this reference signal.
Illustration 3.11 Select Sensor Type
Illustration 3.12 Settings for Sensor
Illustration 3.13 Info: 4-20 mA Feedback Chosen - Connect
Accordingly
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VLT Refrigeration Drive FC 103 1.1-90 kW Operating Instructions
Illustration 3.14 Info: Set Switch Accordingly
Illustration 3.15 Select Unit and Conversion from Pressure
Illustration 3.16 Select Fixed or Floating Setpoint
Illustration 3.17 Set Setpoint
Illustration 3.18 Set High/Low Limit for Setpoint
MG16E202 - VLT® is a registered Danfoss trademark