Using PLC and frequency inverter to control motor teach you practical - operation

a, project description

motor start button, the motor is up and running in the corresponding rotational speed by 5 hz; Delay after 10 s, motor speed operation in 10 hz corresponding speed, delay again after 10 s, motor after

declined, the corresponding rotational speed speed operation in 20 hz; After every 10 s, the speed of change, in turn, referring to the following figure, after an operating period will automatically be rerun. Press the stop button, the motor stop

run.

2, project implementation

1, the MM440 frequency changer Settings

MM440 inverter digital input '5', '6', '7', 'eight' terminal through P0701, P0702, P0703, P0704 parameter is set to 15 period of fixed frequency control side, the frequency of each frequency band respectively by p ~

P1015 parameter Settings. Inverter digital input terminal '16' is set to the motor running, stop control side, but by P0705 parameter Settings.

钱数。 0, motor operation, corresponding motor run button SB1;

钱数。 1, the motor stops, the corresponding motor stop button SB2;

。 0, fixed frequency Settings, the MM440 digital inputs '5';

。 1, fixed frequency Settings, the MM440 digital inputs '6';

。 2, fixed frequency Settings, the MM440 digital inputs '7';

。 3, fixed frequency Settings, the MM440 digital inputs '8';

。 4, run/stop control of the motor, the MM440 digital input terminals '16'

3.

PLC program design of PLC controller program control should include the following:

1) When a button to press forward SB1, PLC Q0. 4 should be setting to ON, allowing the motor running.

( 2) PLC controller output interface state, inverter output frequency, motor speed change

3) When press the stop button SB2, PLC Q0. 4 should be reset to OFF, the motor stops running.

4, operation steps, 1) Connection diagram, check the wiring, right through to PLC and inverter power source.

( 2) Restore the inverter factory default values, P0010 set to 30, P0970 set to 1. Press the 'P' key on the frequency converter operation panel, and inverter to reset to factory default values.

( 3) As follows to set motor parameters, the motor after the parameter Settings, set up

P0010 is 0, is in the ready state inverter current, can be normal operation.

P0003 set to 1, access level as the standard;

P0010 set to 1, the fast debugging;

P0100 to 0, the power to kW, according to the frequency of 50 hz;

P0304 set to 230, the motor rated voltage.

P0305 set to 1, the rated current of the motor.

P0307 to 0. 75, the motor rated power;

P0310 set to 50, motor rated frequency;

P0311 set to 1460, the motor rated speed;

P3900 set to 1, end fast debugging, enter 'ready to run.

( 4) Set the MM440 15 period of fixed frequency control parameters, shown in the following table.

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