Start-up
.
58 | CTW900
3.
Set the speed reference for the motor maximum speed (P0001 = P0134).
4.
Apply the ‘Run’ (
) command.
5.
With a hand tachometer, measure the motor speed and compare to the value displayed on the upper
right corner of the keypad (HMI).
6.
In case the speed displayed on the keypad does not match the reading on the tachometer, change the
value of P0407 (Gain of the DC Tacho) until the value displayed on the keypad is close to the speed
read by the tachometer. Path to access P0407: Menu
01 PARAMETER GROUPS
24 Speed
Feedback.
6.3.3
Feedback by Encoder (P0202 = Encoder)
For motors with feedback by encoder, setting is only needed if the motor operates in the field weakening area.
In this case, temporarily change the speed feedback to EMF (P0202 = EMF), ensure the Number of Pulses per
Rotation of the Encoder is correct (P0405) and execute the procedure of item 6.3.1. Then return the setting of
P0202 to Encoder.
Path to access P0202 and P0405: Menu
01 PARAMETER GROUPS
24 Speed Feedback.
6.4
OPTIMIZATION OF THE REGULATORS
For a better performance of speed and current regulation of the CTW900, it is recommended to set the gains of
the product control loops.
Therefore, execute the steps described in the following topics for a proper setting of each of the regulators.
6.4.1
Optimization of the Speed Regulator (Static)
1.
Set the speed reference for half the motor maximum speed (P0001 = P0134
2).
2.
Check that the Analog Output 1 is set to the ‘Effective Speed’ function (P0251 = 3) and connect an
oscilloscope to the terminals XC1:7 and 8. Path to access P0251: Menu
07 I/O CONFIGURATION
33 Analog Outputs.
3.
Enable firing of the armature bridge by closing the switch connected to the digital input configured as
General Enable and apply the ‘Run’ (
) command.
4.
Observe the stability of the signal on the oscilloscope and, if it is not stable, vary the Speed Proportional
Gain (P0159) until obtaining a signal without oscillations. Path to access P0159: Menu
01
PARAMETER GROUPS
26 REGULATORS
100 Speed Reg.
6.4.2
Optimization of the Current Regulator
1.
With the converter disabled (‘General Enable’ switch open), set the Field Control as disabled (P0297 =
Disabled). Path to access P0297: Menu
01 PARAMETER GROUPS
25 Control Options.
2.
Set the Local Run/Stop command by the digital inputs, by setting P0224 = DIx. Path to access P0224:
Menu
01 PARAMETER GROUPS
27 Local Control.
3.
Disable the stall protection by setting P0355 = 0 %. Path to access P0355: Menu
01 PARAMETER
GROUPS
38 Protections.
4.
Set the Positive Torque Current Limit to 100 % (P0169 = 100 %). Path to access P0169: Menu
01
PARAMETER GROUPS
23 Limits.