MICROMASTER 4 (MM440), SINAMICS G120 (CU2x0x): What parameters do I have to set on an MM440 to give the same binary fixed frequency selection functionality as 6SE32?
This FAQ applies only to the SINAMICS G120/G120D Control Units without “-2” in the product name and MICROMASTER 4 inverters.
On the 6SE32 digital inputs 3, 4 and 5 (terminals 7, 8 and 16) are used to select up to 8 fixed frequencies. With the settings below the same terminals can be used to select up to 8 fixed frequencies on a MM440.
If an external 15V or 24V source is used for the signals to the inputs, on the MM440 terminal 28 is the 0V point that needs connecting to the 0V on the external supply, instead of terminal 2 on the 6SE32 ( do not connect 2 and 28 together unless the application specifically requires this).
We have to use FF8 to 15 on the MM440/G120, as FF0 is fixed at 0hz, and this does not comply with the requirement to select a non zero frequency when all 3 digital inputs are open.
Preparatory parameter setting
|function of digital input||p0703/ p0704/ p0705||selects function of digital inputs (DIN)||99||enable BICO parameterization of DIN3, DIN4, DIN5|
|selection of frequency setpoint||p1000||selects frequency setpoint source||3||fixed frequency (FF)|
|fixed frequency mode||p1016/ p1017/ p1018/ p1019||defines mode for mode for frequency selection (Bit 0 - Bit 3)||3||binary coded selection + ON command|
|fixed freq. selection Bit 3||p1023||defines origin of fixed frequency selection||1 (always high)||with high-signal, FF8 to FF15 are selected|
Specification of the same functionality of MM440/ G120 to MM3
|fixed freq. selection Bit 0||p1020||defines origin of fixed frequency selection||722.4||DIN5|
|fixed freq. selection Bit 1||p1021||defines origin of fixed frequency selection||722.3||DIN4|
|fixed freq. selection Bit 2||p1022||defines origin of fixed frequency selection||722.2||DIN3|
The fixed frequencies are set as follows (MM440/ G120):
|Function||Parameter||Description||Setting||Description/ in comparison to MM3|
|fixed frequency 8||p1008||defines fixed freq. setpoint 8||xx||MM3: FF5 (p046)|
|fixed frequency 9||p1009||defines fixed freq. setpoint 9||xx||MM3: FF6 (p047)|
|fixed frequency 10||p1010||defines fixed freq. setpoint 10||xx||MM3: FF7 (p048)|
|fixed frequency 11||p1011||defines fixed freq. setpoint 11||xx||MM3: FF8 (p049)|
|fixed frequency 12||p1012||defines fixed freq. setpoint 12||xx||MM3: FF1 (p041)|
|fixed frequency 13||p1013||defines fixed freq. setpoint 13||xx||MM3: FF2 (p042)|
|fixed frequency 14||p1014||defines fixed freq. setpoint 14||xx||MM3: FF3 (p043)|
|fixed frequency 15||p1015||defines fixed freq. setpoint 15||xx||MM3: FF4 (p044)|
Check P045 (inverse fixed setpoints for (FF 1-4) and P050 (inverse fixed setpoints for FF 5-8) on the 6SE32 to see if any fixed frequencies have been set to give reverse rotation. The corresponding fixed frequencies on the MM440/ G120 have to be set to a negative value to give reverse rotation.
The theory behind this can be understood by referring to function plan 3210, MM440 parameter list p. 275 and comparing this with the table in the 6SE32 manual p. 51.
- MM3: For further information regarding MM3 FF, please see in 6SE32 manual p. 51; Entry-ID: 5824173
- information about the relevant parameters, please see in the parameter list; Entry-ID: 23708204 (G120; Entry-ID: 32465038)
- for further information regarding MM4 FF, please see the operating instruction chapter "3.8 Fixed Frequencies"; Entry-ID: 24294529
- FAQ: "MICROMASTER/SINAMICS G: Mode of operation of the fixed frequencies for MM4 and G120"; Entry-ID: 24043801