Nidec E300 Series - Page 299

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Optimization CT MODBUS RTU Technical Data
Installation and System Design Guide 299
Issue Number: 1
Start speed loop gains
Start Speed Loop Ki gain
• Increase the value of A50 / I02 Start Speed Loop Ki (default value 20.00) in steps of 1.00 until Motor becomes noisy or unstable to prevent
movement, roll back on brake release
If Motor becomes noisy
• Increase A51 / I05 Start current loop filter to between 2... 6 ms
If Motor becomes unstable
• Reduce A50 / I02 Start Speed Loop Ki value in steps of 1.00
Start Speed Loop Kp gain
• The default value for A49 / I01 Start Speed Loop Kp is 1.000 optimise if during start if there is undershoot or vibration
Undershoot on start of profile
• Increase A49 / I01 Start Speed Loop Kp in steps of 0.500
Vibration on start of profile
• Reduce A49 / I01 Start Speed Loop Kp in steps of 0.100
Run speed loop gains
Run Speed Loop Kp gain
• Increase A52 / I06 Run Speed Loop Kp (default value 0.5000) in steps of 0.1000 until Motor becomes noisy or unstable to overcome overshoot at
the end of acceleration or vibration during constant speed
If Motor becomes noisy
• Increase A54 / I10 Run current loop filter to between 2... 6 ms
If Motor becomes unstable
• Reduce A52 / I06 Run Speed Loop Kp by up to 60 % of the value in steps of 10 %
Setting the Run Speed Loop Ki gain
• Set the value of A53 / I07 Run Speed Loop Ki (default value 10.00) to 10 x A52 / I06 Run Speed Loop Kp value
The current filters can be used to overcome control noise, position feedback noise and quantisation resulting in Motor acoustic noise.
Elevator drive trips Speed err or Distance err
• Check Speed err thresholds in H15, and Distance err threshold in H16 are set correctly
• Check Motor connections
• Check Encoder connections
• Check speed loop gain settings
Parameter Description Default setting
A51 / I05 Start current loop filter 1.0 ms
A54 / I10 Run current loop filter 1.0 ms