6-20
Autostart 72-STRT = 1
If one of the start contacts STL or STR is bypassed and the reference
input FSIN > 0.5 Hz, the inverter starts automatically once mains supply
reconnected.
Synchronisation 72-STRT = 2
Once the start contact is activated, the inverter first of all carries out a
search procedure to determine the current motor speed. The search
starts with the maximum frequency 22-FMAX1, meaning that the inverter
is working super-synchronously, producing a positive effective current.
The rotary field frequency is reduced until the effective current becomes
negative. Hence the inverter is operating sub-synchronously. The inverter
synchronises to the motor speed thus found with the appropriate rotary
field frequency.
The synchronisation functions in both rotation directions.
Rotation direction block 72-STRT = 4
With this start option, rotation counter-clockwise with respect to the
inverter is blocked in every case. This means that the counter-clockwise
rotation direction can neither be activated by the control input STL nor by
the CTRL menu.
74-PWM Switching frequency [Decimal]
Parameter 74-PWM determines the switching frequency of the final levels.
74-PWM Switching suitable for Factory setting
frequency
0 7.8 kHz VF1205M to VF1410M all VF1000M
1 15.6 kHz VF1205M to VF1410M
2 3.9 kHz VF1205M to VF1410M
75-OPT1 Options 1
With this parameter, the special functions for the error acknowledgement
for example are possible.
Note: This parameter can only be set with 01-MODE = 3.
75-OPT1 Function
0 0 H Without function
0 2 H Error acknowledgement via S2IND
0 4 H Error acknowledgement via STL or STR
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