Easy Start Guide
Bosch Rexroth EFC 5610 Series Inverter
8. How to enable Sensorless Vector Mode
Page 8
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Drive Supermarket and must not be reproduced or altered without prior written permission.
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This guide has been produced by The Inverter Drive Supermarket Ltd.
The standard motor control mode of the
EFC5610 Inverter is VxF. This simple mode
controls motor speed by varying Volts and
Frequency in a specific ratio to maintain output
torque.
The EFC5610 can also operate in Sensorless
Vector mode. This can improve motor
performance without requiring a separate
feedback device. Sensorless Vector mode
operates in a similar way as VxF but performs
a number of calculations to improve low speed
torque.
To enable sensorless vector control first set the
parameter values specified in 8.1 and then
follow the steps described in 8.2 and 8.3.
These calculations require a rotating
“autotune” run with bare shaft during which the
Inverter operates for approx. 30s to gather the
necessary data.
For loads that cannot be decoupled from the
motor, a stationary Autotune (set C1.01 to 1
instead of 2) is possible but is not as accurate.
A rotating Autotune is therefore the preferred
option.
Access to additional parameters
Default is 0 for Basic Parameters. Set to to enable Advanced Parameters.2
Must be set correctly before Sensorless vector control is enabled.
Refer to section 5 for details.
8.1 Parameters to check prior to an Autotune.
8.2 Start Autotune.
Once the parameters in 8.1 have been set, select
parameter C1.01 and change the value to 2 and press
“Set” to save the changes.
Ensure that the motor is decoupled from the load before
pressing the green “Run” button to begin the autotuning
process.
Press the “Func” key repeatedly until the speed reference
is displayed.
8.3 The Autotune process.
During the autotuning process, the display will show
“tUnE”.
Important: To enable sensorless vector mode once
the autotune is complete set parameter C0.00 to 1.
When the process is complete the motor will stop, the
“run” lamp will no longer be illuminated and the display
will return to the speed reference. The results are saved
in parameters C1.12 to C1.14 and C1.20 to C1.24 but
sensorless vector mode is not enabled automatically.
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