SIEMENS ICROMASTER 420 frequency converter

Key Function Remarks

The start button is disabled by default for starting the motor, and P0700=1 is required to enable it

Press and hold the stop button OFF1 (slope stop)/OFF2 (free stop) twice or once to keep it enabled

When the reverse button switches the motor direction to reverse, it displays a "-" or flashes a decimal point

Fn key to view additional information (DC bus voltage, output current, etc.) Short press to jump to r0000, long press to cycle display status

AOP (Advanced Operating Panel): Optional accessories, supporting multiple languages, parameter upload/download, and multi machine (30 units) control. Please refer to the AOP independent manual.

2. Quick debugging (key process)

Enter debugging mode: set P0010=1 (fast debugging filtering);

Basic configuration:

P0700: Select instruction source (e.g. 1=BOP, 2=numeric input);

P1000: Select frequency given (e.g. 1=BOP, 2=analog input);

P0100: Select region (0=Europe 50Hz/kW, 1=North America 60Hz/hp);

Motor parameter settings (matching motor nameplate):

P0304: Rated voltage of motor (V);

P0305: Rated current of motor (A);

P0307: Rated power of motor (kW/hp, determined by P0100);

P0310: Rated frequency of motor (Hz);

P0311: Rated speed of motor (rpm);

End debugging: Set P3900=2 (perform motor calculation+restore P0010=0), and it can be run after completion.

3. Factory reset

Operation: Set P0010=30 (reset filter) → P0970=1 (trigger reset), the reset process takes about 3 minutes, and the parameters will return to factory default after reset.

4、 Detailed Explanation of Parameter System

1. Parameter access control

Access level (P0003): Level 4 permission, determining the visible parameter range:

1 (Standard): Basic operating parameters;

2 (Extension): Add motor and control related parameters;

3 (Expert): Add advanced debugging parameters;

4 (Service): Hidden parameters (requires P3950=1 to unlock).

Parameter filtering (P0004): grouped by function for quick search:

P0004 value function grouping includes parameter examples

2 frequency converter units r0026 (DC bus voltage), P1800 (switching frequency)

Motor data P0304 (rated voltage), P0610 (motor I ² t protection)

7 Instructions and Digital I/O P0700 (Command Source), P0731 (Digital Output)

10 Frequency Given and Slope P1000 (Frequency Given), P1120 (Slope Rise Time)

2. Classification of core parameters

Parameter Category Key Parameter Function Description Default Values (Europe)

Debugging Control P0010 Debugging Mode Filter 0 (Normal)

P3900 ends debugging 0 (without performing motor calculations)

P0970 Factory reset 0 (not triggered)

Motor protection P0610 motor I ² t protection 2 (enabled)

P0335 motor cooling method 0 (self cooling)

Operation control P1300 control mode 1 (linear V/f with FCC)

P1120 Slope Rise Time 10s

P1121 Slope descent time 10s

Troubleshooting and Warning

1. Fault indication method

SDP: Fault is determined by the combination of on/off/flashing of two LEDs (such as "dual lights flashing together=ROM fault" and "dual lights flashing alternately=RAM fault"), as shown in Table 6-1.

BOP/AOP: Display fault codes (Fxxx) or alarm codes (Axxx), and view historical faults (P0947 stores the last 8 faults).

2. Common faults and solutions

Fault code, fault type, possible causes, and solutions

F0001 grounding fault 1. The motor power does not match the frequency converter; 2. Motor/cable grounding; 3. Motor overload: 1. Check the power between P0307 and the frequency converter; 2. Check the insulation of motor windings/cables; 3. Reduce load

F0002 DC bus overvoltage 1. Input voltage too high; 2. The slope descent time is too short; 3. The regenerative energy of the load is high. 1. Check the power supply voltage (which should be between 200-480V ± 10%); 2. Increase P1121 (slope descent time); 3. Install a braking unit

F0051 parameter EEPROM fault EEPROM read/write failure 1. Perform factory reset (P0010=30+P0970=1); 2. Replace the frequency converter (if reset is ineffective)

3. Fault reset method

Power off and restart the frequency converter;

Press the reset button on BOP/AOP;

Triggered by digital input 3 (default function is fault reset).

Technical specifications and certification

1. Core electrical specifications

Project specification parameters

Input voltage: 1 phase 200-240V ± 10%, 3 phases 200-240V ± 10%, 3 phases 380-480V ± 10%

Input frequency 47-63Hz

Output frequency 0-650Hz

Overload capacity 50% overload (60s/5min, based on rated output current)

Efficiency 96-97%

Control mode linear V/f (P1300=0), linear V/f with FCC (P1300=1), secondary V/f (P1300=2), multi-point V/f (P1300=3)

Interface: 3 digital inputs, 1 analog input (0-10V), 1 relay output, 1 analog output (0-20mA), RS485 communication

2. Certification and Compliance

Protection level: IP20;

Certification standards: UL, cUL, CE, C-tick;

Directive Compliance: Compliant with EMC Directive 89/336/EEC and Low Voltage Directive 73/23/EEC;

EMC classification: Supports Class 1 (industrial general), Class 2 (filtering industry), Class 3 (civil/commercial/light industry, requiring Class B filters).

Optional accessories

Accessory type, specific product function

Equipment independent accessory BOP (basic operation panel) basic parameter setting and operation control