Automation and Drives - SCE
3.6Exercises
1. Changing the start and the braking behavior of the motor
Change the parameters of the SINAMICS G120 in a way that the effective acceleration time to a maximum of 50Hz amounts to 18 seconds. The effective deceleration time of 50Hz to 0Hz is to amount to 12 seconds. When accelerating and decelerating the motor, acceleration and deceleration is to take place with a rounding time of 3 seconds each.
You can read the actual frequency off the converter’s display and in this way recognize the motor’s approach behavior and braking behavior. Check the correctness of your parameter inputs with a stop watch.
The motor potentiometer setpoint is to be accelerated to 25Hz with the BOP. If you then stop the motor with the BOP, you can observe the deceleration ramp, and stop it.
2. Controlling the converter by means of the digital inputs DIN1 to DIN3
Change the parameters of the SINAMICS G120 in a way that the motor can be started by means of the digital inputs DIN1 to DIN3. The fixed frequency 1 is set to 25Hz. By means of the digital inputs DIN2 and DIN3, the respective fixed frequencies 2 and 3 can be connected. DIN2 = 15Hz, DIN3 = 10Hz. If several inputs are enabled, the frequency value is totaled. The acceleration time to 50Hz maximum is to amount to 9.7s, the deceleration time 7.8s. This includes a rounding time of 3.6s. Check the correctness of your parameter inputs at the indication on the converter’s display, and by using a stop watch.
3. Speed Control via Analog Value
Change the parameters of the SINAMICS G120 in a way that the speed of the motor can be specified by means of a voltage of from 0V to 10V at the converter’s analog input. Starting and stopping the motor as well as reversal and the jog function are to be performed with the operator panel. The acceleration time to a maximum of 50Hz is to amount to 11.3s. The deceleration time amounts to 6.5s. The motor is to be accelerated and slowed down without rounding time. Check the correctness of your parameter inputs at the indication on the converter’s display, and by using a stop watch.
Note:
As you do the exercises, use the software STARTER: For each exercise, set up a project, test and save it by using the commissioning wizard.
If you need additional information about the individual parameters, refer to Online Help, or the function charts and the parameter descriptions in the List Manual.
| Preface | Notes | Startup with PROFIBUS | Startup with PROFINET | Program Example |
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T I A Training Document |
| Page 74 of 147 |
| Module | |
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| H01 |
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Issued: 02/2008 |
| Frequency Converter SINAMICS G120 on PROFIBUS DP and PROFINET | |||
