Commissioning
5.2 Preparing for commissioning
Converter with control units CU250D-2
Operating Instructions, 04/2015, FW V4.7.3, A5E34261542B AB
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5.2.3
Defining additional requirements for the application
What speed limits should be set (minimum and maximum speed)?
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Minimum speed - factory setting 0 [rpm]
The minimum speed is the lowest speed of the motor independent of the speed setpoint.
A minimum speed is, for example, useful for fans or pumps.
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Maximum speed - factory setting 1500 [rpm]
The inverter limits the motor speed to this value.
What motor ramp-up time and ramp-down time are needed for the application?
The ramp-up and ramp-down time define the maximum motor acceleration when the speed
setpoint changes. The ramp-up and ramp-down time is the time between motor standstill and
the maximum speed, or between the maximum speed and motor standstill.
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Ramp-up time - factory setting 10 s
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Ramp-down time - factory setting 10 s
5.2.4
Encoder assignment
Description
The converter offers three options of allocating encoders to the closed-loop control on the
motor and load side.
Position controller operates with SSI encoder, speed controller with HTL encoder
Figure 5-2
SSI encoder on the load side for the position controller, HTL encoder on the motor axis
for the speed controller
Compared to the other options, the encoder assignment provides this configuration with the
best control results.
