This FAQ applies only to the SINAMICS G120/G120D Control Units without “-2” in the product name and MICROMASTER 4 inverters.
The following example explains how to switch between fixed frequency operation and analogue setpoint:
Set the fixed frequency as the main setpoint and the analogue as the additional setpoint (P1000 = 23).
Normally the main setpoint and the additional setpoint sum together in the setpoint channel. To switch between both frequencies you have to enable or disable the particular frequency. Parameterize a digital input (e.g. DIN 3) to disable the additional setpoint (P1074) and sets the fixed frequency (P1022).
|User access level
||Defines user access level to parameter sets
||Allows extended access|
|Selection of frequency setpoint
||Selects frequency setpoint source (main setpoint + additional setpoint)
||Fixed frequency + Analog setpoint|
|Fixed frequency 3
||Defines fixed frequency
|Function of digital input 3
||Selects function of digital input 3
||Enable BICO parameterization|
|Fixed freq. selection Bit 2
||Defines origin of fixed frequency selection
|Disable additional setpoint
||Disables additional setpoint
- DIN 1 = ON / OFF 1
- DIN 2 = reverse
- DIN 3 = enable fixed frequency / disable additional setpoint