7 Detailed Functions
7 - 106
High-function General-purpose Inverter 3G3RX-V1 User’s Manual (I578-E1)
In the following cases, the inverter trips and outputs the brake error signal (BER). (Brake error: E36)
• The output current remains lower than the brake release current when the Brake Release Wait
Time (b121) has elapsed.
• If the brake confirmation signal (BOK) is used, this error is detected when:
• The brake confirmation signal did not turn ON within the Brake Error Detection Time (b124)
during acceleration.
• The brake confirmation signal did not turn ON within the Brake Error Detection Time (b124)
during deceleration.
• The brake confirmation signal turned OFF although the brake release signal is output.
• Use this function to prevent overvoltage trip caused by the regenerative energy from the motor during
deceleration.
• Enable or disable the function in the Overvoltage Suppression Function Selection During
Deceleration (b130).
• If the Overvoltage Suppression Function Selection During Deceleration (b130) is set to 01 (Enabled:
DC voltage constant control), the inverter decelerates automatically so that the increase in the main
circuit DC voltage due to the start of deceleration is maintained to the Overvoltage Suppression Level
During Deceleration (b131).
• If the Overvoltage Suppression Function Selection During Deceleration (b130) is set to 02 (Enabled:
acceleration enabled), the inverter starts accelerating according to the Overvoltage Suppression
Parameter During Deceleration (b132) setting when the main circuit DC voltage increases due to the
start of deceleration to exceed the Overvoltage Suppression Level During Deceleration (b131). After
that, when the main circuit DC voltage falls below the value set in b131, the inverter restrats
deceleration.
• To use this function, set the Usage Rate of Regenerative Braking (b090) to 0.0 (Disabled) and the
Regenerative Braking Selection (b095) to 00 (Disabled).
*1 When b130 is set to 01, PI control works to keep the internal DC voltage constant. Although increasing the
Overvoltage Suppression Proportional Gain During Deceleration (b133) provides a faster response, setting it
to an excessive large value may cause an overcurrent trip. Increasing the Overvoltage Suppression Integral
Time During Deceleration (b134) also provides a faster response, but setting it to an excessive small value
may cause an overcurrent trip.
*2 If b131 is set to a value less than the incoming voltage, the inverter may not be able to stop the motor.
Normally, do not set this value to 350 V or less for 200-V class and 700 V or less for 400-V class.
*3 The default data was changed from the previous model.
Overvoltage Suppression Function during Deceleration
Parameter
No.
Function name Data
Default
data
Unit
b130
Overvoltage Suppression
Function Selection During
Deceleration
00: Disabled
01: Enabled (DC voltage constant control)
(Example 1)
*1
02: Enabled (Acceleration enabled)
(Example 2)
01
*3
–
b131
Overvoltage Suppression Level
During Deceleration
*2
200-V class: 330 to 390
400-V class: 660 to 780
380/760 V
b132
Overvoltage Suppression
Parameter During Deceleration
0.10 to 30.00: Set the acceleration rate
applied when this function is enabled.
1.00 s
b133
Overvoltage Suppression
Proportional Gain During
Deceleration
0.00 to 2.55: Proportional gain for DC
voltage constant control (b130 = 01 only)
0.50 –
b134
Overvoltage Suppression
Integral Time During
Deceleration
0.000 to 9.999/10.00 to 65.53: Integral
time for DC voltage constant control (b130
= 01 only)
0.060 s
To Next Page
Loading...
