Parameter Details
12
12.8 L: PROTECTION
SIEPCYEUOQ2V01A Q2V Technical Manual 651
■ L3-17: DCBus Regul.Level
No.
(Hex.)
Name Description
Default
(Range)
L3-17
(0462)
DCBus Regul.Level
Sets the target value for the DC bus voltage when the overvoltage suppression function and the
Decel Stall Prevention function (Intelligent Stall Prevention) are active.
200 V Class: 375 V, 400 V:
750 V
(200 V Class: 150 to 400 V,
400 V Class: 300 to 800 V)
Note:
This value is initialized when E1-01 [Input AC Supply Voltage] is changed.
Sets this parameter for any of the following circumstances.
• L3-11 = 1 [Overvolt Supression Select = Enabled].
• L3-04 = 1 [StallP@Decel Enable = Enabled] and L3-50 = 1 [StallP@Decel Mode = Automatic Decel
Reduction].
■ L3-20: DCBus VoltAdj Gain
No.
(Hex.)
Name Description
Default
(Range)
L3-20
(0465)
Expert
DCBus VoltAdj Gain
Sets the proportional gain used to control the DC bus voltage.
Determined by A1-02
(0.00 - 5.00)
Set one of these parameters to enable L3-20:
• L2-29 = 2 [KEB Method = Single KEB2 Ride-Thru]
• L3-04 = 1 [StallP@Decel Enable = Enabled] and L3-50 = 1 [StallP@Decel Mode = Automatic Decel
Reduction]
• L3-11 = 1 [Overvolt Supression Select = Enabled]
• H1-xx = 42 or 43 [MFDI Function Select = KEB Thru2 NC or KEB Thru2 NO]
Note:
• If stall prevention during deceleration function causes ov [Overvoltage] and Uv1 [DC Bus Undervoltage] faults when you start
deceleration and L2-29 = 1, H1-xx = 42 or 43, or L3-04 = 1 and L3-50 = 1, gradually increase this parameter in 0.1-unit increments. If
the setting value is too high, it can cause large speed or current ripples.
• If sudden increases in the regenerative load cause ov faults and L3-11 = 1, gradually increase this parameter in 0.1-unit increments. If
the setting value is too high, it can cause large speed or current ripples.
■ L3-21: OVSup Acc/Dec Gain
No.
(Hex.)
Name Description
Default
(Range)
L3-21
(0466)
Expert
OVSup Acc/Dec Gain
Sets the proportional gain to calculate acceleration and deceleration rates.
Determined by A1-02
(0.10 - 10.00)
Set one of these parameters to enable L3-21:
• L2-29 = 2 [KEB Method = Single KEB2 Ride-Thru]
• L3-04 = 1 [StallP@Decel Enable = Enabled] and L3-50 = 1 [StallP@Decel Mode = Automatic Decel
Reduction]
• L3-11 = 1 [Overvolt Supression Select = Enabled]
• H1-xx = 42 or 43 [MFDI Function Select = KEB Thru2 NC or KEB Thru2 NO]
Note:
• If stall prevention during deceleration function causes ov [Overvoltage] and Uv1 [DC Bus Undervoltage] faults when you start
deceleration and L2-29 = 1, H1-xx = 42 or 43, or L3-04 = 1 and L3-50 = 1, gradually increase this parameter in 0.1-unit increments. If
the setting value is too high, it can cause large speed or current ripples.
• If sudden increases in the regenerative load cause ov faults and L3-11 = 1, gradually increase this parameter in 0.1-unit increments. If
the setting value is too high, it can cause large speed or current ripples.
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