Using Fixed Frequencies - Siemens SINAMICS G120 Manual

2.4 Application case
You'll now see how you can use the Basic Operator Panel 2 to make additional adjustments. In
specific applications, it is meaningful, for example, to control the motor using fixed frequencies.
Fixed frequencies are preset at digital inputs DI 3, DI 4, and DI 5. Therefore, the setpoint source
must be switched from the potentiometer to the digital inputs on the terminals. This can be ac-
complished quickly and simply using the Basic Operator Panel 2. As previously mentioned, you
define the setpoint source using parameter P1000.

Using fixed frequencies

Changing setpoint source
• Navigate with the menu bar to menu function PARAMETER.
• Select the STANDARD filter.
• Navigate to parameter P1000 and access index [00].
• Change value 2 to 3.
The setpoint source has been transferred from the potentiometer to fixed frequencies at digital
inputs DI 3, DI 4 and DI 5. If you now attempt to control the motor using the potentiometer, you will
see that the motor does not react. The next step is to determine the revolution speed associated
with the digital inputs: 300, 600, 900 1/min.
Setting fixed numbers of revolutions
• The digital inputs of switches DI 3, DI 4, and DI 5 are assigned the revolution speed of
• You can see this by consulting P1001, P1002, and P1003.
• Change these values by pressing OK, UP, and DOWN to P1001=300, P1002=600, P1003=900.
Operator Panels BOP-2 and IOP:
30
OK OK
OK OK
0 1/min by default.
OK OK
Application case
OK OK
OK OK
OK OK OK OK
OK OK OK OK
OK OK
OK OK
OK OK