Siemens MICROMASTER 420 - 3 Factory Setting; 50;60 Hz DIP Switch

3 Factory setting Issue 04/04
MICROMASTER 420
8 Compact Operating Manual
3 Factory setting
The MICROMASTER 420 frequency inverter is set in the factory so that it can be
operated without any additional parameterization. To do this, the motor parameters
set in the factory (P0304, P0305, P0307, P0310), that correspond to a 4-pole 1LA7
Siemens motor, must match the rated data of the connected motor (refer to the
rating plate).
Further factory setting:
 Command sources P0700 = 2 (Digital input, see Fig. 3-1)
 Setpoint source P1000 = 2 (Analog input, see Fig. 3-1)
Digital Inputs
I/O
Ack
< 4.7 k Ω
Analog input
 Motor cooling
P0335 = 0
 Motor current limit
P0640 = 150 %
 Min. frequency
P1080 = 0 Hz
 Max. frequency
P1082 = 50 Hz
 Ramp-up time
P1120 = 10 s
 Ramp-down time
P1121 = 10 s
 Control mode
P1300 = 0
Fig. 3-1 Analog and Digital Inputs
Input/Output Terminals Parameter Function
Digital input 1 5 P0701 = 1 ON / OFF1 (I/O)
Digital input 2 6 P0702 = 12 Reverse ( )
Digital input 3 7 P0703 = 9 Fault reset (Ack)
Digital input 8 - Power supply Digital input
3/4 P1000 = 2 Frequency setpoint
Analog input
1/2 - Power supply Analog input
Output relay 10/11 P0731 = 52.3 Default identification
Analog output 12/13 P0771 = 21 Output frequency
3.1 50/60 Hz DIP switch
The default motor base frequency
of the MICROMASTER inverter is
50 Hz. For motors, which are
designed for a base frequency of
60 Hz, the inverters can be set to
this frequency via a DIP switch.
 Off position:
European defaults
(50 Hz, kW etc.)
 On position:
North American defaults
(60 Hz, hp etc.)
50/60 Hz DIP switch
for frequency setting
60 Hz
50 Hz