YASKAWA iQpump Micro CIMR-PW Series User Manual page 196

5.8 L: Protection Functions
Note: Make sure the Run command is not switched off when momentary power loss occurs. If the Run command is shut off, the drive will not
accelerate back to speed when the power is restored.
KEB Related Adjustment Parameters
The KEB 1 functions can be adjusted using the following parameters:
• L2-05, Undervoltage Detection Level
• L2-06 or C1-09, KEB Deceleration Time or Fast-stop Time
• L2-07, KEB Acceleration Time
• L2-08, Frequency Gain at KEB Start
Use the following parameters when adjusting the KEB 2 function:
• L2-05, Undervoltage Detection Level
• L2-08, Frequency Gain at KEB Start
• L2-11, Desired DC Bus Voltage during KEB
• L3-20, Main Circuit DC Voltage Adjustment Gain
Sets the proportional gain for controlling the DC bus voltage and keeping it at the desired level during KEB 2 operation.
• L3-21, Accel/Decel Rate Calculation Gain
Sets the gain used to calculate the acceleration or deceleration rate when KEB 2 is active.
• L3-24, Motor Acceleration Time
This value is used to estimate the regenerative power fed back from the mechanics to the drive DC bus during KEB 2.
• L3-25, Load Inertia Ratio
This value is used to estimate the regenerative power fed back from the mechanics to the drive DC bus during KEB 2.
L2-06: KEB Deceleration Time (KEB 1 only)
n
Sets the time to decelerate from the frequency reference when the KEB command was input down to zero speed. It can be
used to decelerate different drives down to zero in the same time and thereby keep a constant speed ratio.
When L2-06 is set to 0.0 s, the time set in parameter C1-09 (set for deceleration from maximum frequency to zero) is used for
the deceleration.
No.
L2-06
L2-07: KEB Acceleration Time (KEB 1 only)
n
Sets the time to reaccelerate from the speed when KEB was deactivated to the frequency reference. It can be used to accelerate
different drives up to their frequency reference in the same time and thereby keep a constant speed ratio.
When set to 0, the drive will accelerate back up to speed according to parameters C1-01 through C1-04 (set for acceleration
from zero to maximum frequency).
196
B1
L1 R/L1
L2 S/L2
T/L3
L3
UV Detection
Relay
S6 - KEB command 1 or 2
S1 - Start command
SC
Figure 5.71 KEB Function Wiring Example
Name
KEB Deceleration Time
Braking
Resistor
B2
U/T1
V/T2
W/T3
Setting Range
0.0 to 200.0 s
YASKAWA TOEP YAIQPM 03B YASKAWA AC Drive - iQpump Micro User Manual
M
Default
0.0 s