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Start-up
CTW900 | 57
6.3.1
Feedback by EMF (P0202 = EMF)
1.
Keep the motor uncoupled from the load if possible.
2.
Release the firing of the armature bridge by closing the switch connected to the digital input configured
as General Enable.
3.
Set the speed reference for the motor rated speed (P0001 = P0402).
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.
In case the speed displayed on the keypad (HMI) does not match the reading on the tachometer, change the
value of P0185 (Gain of the Ua Signal) until the value displayed on the keypad is close to the speed read by the
tachometer. Path to access P0185: Menu
01 PARAMETER GROUPS
26 REGULATORS
103 EMF
Reg.
6.
Stop the motor (
) and apply load.
7.
Accelerate the motor again up to the rated speed and measure the speed with the hand tachometer.
8.
In case the speed did not reach the rated speed, set the value of P0409 (Armature Resistance),
monitoring the speed with the tachometer until obtaining the rated value. Path to access P0409: Menu
01 PARAMETER GROUPS
37 Motor Data.
6.3.2
Feedback by DC Tacho (P0202 = DC Tacho)
In case of feedback by DC Tacho, before making the settings described below, make sure the tacho is
connected to the correct input, according to the voltage characteristic of the tacho and the maximum operating
speed of the motor.
Example:
For a DC tacho that supplies 60V for 1000 rpm (P0406 = 60V) and a maximum motor speed of 2100 rpm
(P0134 = 2100 rpm), the voltage generated by the DC tacho when the motor is at maximum speed will be:
60V = 1000 rpm
V
tacho
= 2100 rpm
V
126
V
1000
60
2100
V
tacho
tacho
Thus, considering the reading range of the terminals of connector XC4,
XC4:1
(+)
XC4:2
(
) 9 to 30 Vdc
XC4:3
(
) 30 to 100 Vdc
XC4:4
(
) 100 to 350 Vdc
the cables of the tacho in this case must be connected to the input XC4:1(+) and XC4:4 (-).
Procedure to set the DCTacho:
1.
In case the motor operates in the field weakening area, temporarily change the speed feedback to EMF
(P0202 = EMF) and execute the procedure of item 6.3.1. Then return the setting of P0202 to DC
Tacho. Path to access P0202: Menu
01 PARAMETER GROUPS
24 Speed Feedback.
2.
Enable the firing of the armature bridge by closing the switch connected to the digital input configured
as General Enable.
Содержание CTW900
Страница 2: ......
Страница 52: ...Installation and Connection 52 CTW900 Figure 5 16 Connections in XC1 for configuration 4...
Страница 69: ...Detailed Description of the Parameters CTW900 69 Figure 7 3 Block diagram of the speed reference...
Страница 135: ...Detailed Description of the Parameters CTW900 135 Figure 7 21 Block diagram of the control of the CTW900...