Omron Q2V Series Technical Manual page 645

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L2-11: KEB DC Volt Setpoint
No.
Name
(Hex.)
L2-11 KEB DC Volt Setpoint
(0461)
Expert
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L2-29: KEB Method
No.
Name
(Hex.)
L2-29 KEB Method
(0475)
Expert
Set L2-01 = 1 [RideThru@PwrLoss = Enabled], and L2-50 = 2, 3, or 4 [RidThruMode@PwrLoss = KEB Mode,
KEB Stop Mode, KEB Decel to Stop] or KEB Ride-Thru 1/2 [H1-xx = 40, 41, 42, or 43], to enable the KEB
function.
1 : Single KEB1 Ride-Thru
The drive monitors the DC bus voltage and uses regenerative energy from the motor to hold the DC bus voltage at
the level set in L2-11 [KEB DC Volt Setpoint].
The KEB operation continues and the deceleration rate changes as specified by C1-09 [Fast Stop Time].
Note:
• If the drive detects Uv1 [DC Bus Undervoltage] during KEB operation, decrease the value of C1-09.
• If the drive detects ov [Overvoltage] during KEB operation, increase the value of C1-09.
2 : Single KEB2 Ride-Thru
The drive does KEB operation and automatically calculates the deceleration rate to make sure that the main circuit
electrical energy and main current voltage from motor regenerative energy is equal to L2-11 [KEB DC Volt
Setpoint].
3 : System KEB1 Ride-Thru
The drive does not monitor the DC bus voltage and decelerates as specified by the KEB deceleration time set in
L2-06.
Set L2-06 to the time necessary to decelerate from the frequency reference to 0 Hz when the drive detects a
momentary power loss. The drive can decelerate and keep constant deceleration rates for more than one drive.
Note:
If you keep constant deceleration rates for more than one drive, it can trigger ov faults. Use the dynamic braking option with System
KEB Ride-Thru 1 to prevent ov faults.
4 : System KEB2 Ride-Thru
The drive monitors the DC bus voltage and decelerates for the deceleration time set in L2-06.
If the DC bus voltage increases, the drive momentarily holds the frequency to prevent ov while deceleration
continues.
Note:
When you cannot use a dynamic braking option, use System KEB Ride-Thru.
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L2-30: KEB ZeroSpeed Operation
No.
Name
(Hex.)
L2-30 KEB ZeroSpeed Operation
(045E)
Expert
1 : Baseblock
2 : DC/SC Braking
Does DC injection braking and short circuit braking as specified by b2-04 [DCInj Time@Stop] and b2-13 [SCB
Time@Stop].
SIEPCYEUOQ2V01A Q2V Technical Manual
V/f OLV OLV/PM OLV/PM AOLV/PM EZOLV
Sets the target value that controls the DC bus voltage to a constant level in Single Drive KEB
Ride-Thru 2. Sets the DC bus voltage level that completes the KEB operation for all other KEB
methods.
V/f OLV OLV/PM OLV/PM AOLV/PM EZOLV
Sets the KEB function operation mode.
V/f OLV OLV/PM AOLV/PM EZOLV OLV/PM
Sets the operation when the output frequency decreases below the zero level (DC braking
injection starting frequency) during KEB deceleration when L2-01 = 1 [RideThru@PwrLoss =
Enabled] and L2-50 = 2 to 4 [RidThruMode@PwrLoss = KEB ModeKEB Stop Mode, or KEB
Decel to Stop].
Description
Description
Description
12.8 L: PROTECTION
Default
(Range)
Determined by E1-01
(Determined by E1-01)
Default
(Range)
1
(1 - 4)
Default
(Range)
1
(1, 2)
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