Instruction manual

Cascade Controller Option
Programming:
Parameter Parameter Parameter
Number Description Value
415 Ref./FDBK UNIT Process unit
413 MIN. FEEDBACK Transmitter low limit
414 MAX. FEEDBACK Transmitter high limit
417 2 FEEDBACK CALC. Desired operation
308 AI [V] 53 FUNCT. FEEDBACK
309 AI 53 SCALE LOW 0V
310 AI 53 SCALE HIGH 10V
311 AI [V] 54 FUNCT. FEEDBACK
312 AI 54 SCALE LOW 0V
313 AI 54 SCALE HIGH 10V
314 AI [mA] 60 FUNCT. NO OPERATION
Two 4 - 20 mA feedback transmitters connection:
When two feedback signals are used, the AFD requires
that they both be connected to its analog voltage
inputs, terminals 53 and 54. Transmitters that produce
a current signal can be used by adding two resistors.
If the transmitter is capable of producing 10V at 20
mA, the value of the resistor to use is:
The input scaling of the AFD analog inputs in this
case would have to be 2 - 10 Volt.
Programming:
Parameter Parameter Parameter
Number Description Value
415 Ref./FDBK UNIT Process unit
413 MIN. FEEDBACK Transmitter low limit
414 MAX. FEEDBACK Transmitter high limit
417 FEEDBACK CALC. Desired operation
308 AI [V] 53 FUNCT. FEEDBACK
309 AI 53 SCALE LOW 2V
310 AI 53 SCALE HIGH 10V
311 AI [54] 54 FUNCT. FEEDBACK
312 AI 54 SCALE LOW 2V
313 AI 54 SCALE HIGH 10V
314 AI [mA] 60 FUNCT. NO OPERATION
Two feedback signals and two setpoints:
Similar to two feedback signals and one setpoint, the
need for two feedback signals with two setpoints is
frequently encountered. Whenever two critical zones
do not have the same setpoint value, two feedback
with two setpoint control is required. Many pumping
systems require the monitoring and control of two
loads that differ in size and pressure drop. Or this can
be effective when controlling different temperature
zones in cooling or heating applications.
To enable this setup, the feedback function in
parameter 417, Feedback Function, is selected. When
selecting 2-zone Minimum in parameter 417, the drive
will regulate the system so the feedbacks are equal to
or greater than their associated setpoints. If 2-zone
MG.60.I5.22 - VLT is a registered Danfoss trademark
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