P0202 = 4; V/F, Vvw And Ride-Through - WEG CFW-11 Programming Manual

12.7.2.2 P0202 = 4

During the time period when the motor is being magnetized, the identification of the motor speed occurs. Once
the magnetization is finished, the motor will be operated starting from that speed until reaching the speed
reference indicated in P0001.
The parameters P0327 to P0329, P0331 and P0332 are not used.

12.7.3 V/f, VVW and Ride-Through

The Ride-Through function in the V/f or VVW mode will disable the output pulses (IGBT) of the inverter as soon
as the input voltage reaches a value below the undervoltage level. The undervoltage fault (F021) does not
occur and the DC link voltage will decrease slowly until the line voltage returns.
If the line takes too long to return (more than 2 seconds), the inverter may indicate F021 (DC Link Undervoltage).
If the line voltage returns before a fault, the inverter will enable the pulses again, imposing the speed reference
instantaneously (as in the Flying Start function) and applying a voltage ramp with the time defined by P0331.
Refer to the Figure 12.7 on page
Line Returns
P0332
Enabled
Disabled
(a) with the line returning before the time adjusted in P0332
The actuation of the Ride-Through function can be visualized at the outputs DO1/RL1, DO2/RL2, DO3/RL3,
DO4 and/or DO5 (P0275 to P0279), provided that they have been programmed in "24 = Ride-Through".
12-15.
DC Link Voltage
F021 Level
Output Pulses
P0331
Output Voltage
0 V
Output Speed
(P0002)
0 rpm
Figure 12.7 - (a) and (b) - Ride-Through actuation in V/f mode
Functions Common to All the Control Modes
Line Returns
Enabled
P0332
P0331
Disabled
(b) with the line returning after the time adjusted in P0332, but
before 2 s (for P0332 ≤ 1 s), or before 2 x P0332
(for P0332 > 1 s)
DC Link Voltage
F021 Level
Output Pulses
Time adjusted in P0332
Output Voltage
0 V
Output Speed (P0002)
0 rpm
12
12-15