Parameter Details
12
12.8 L: PROTECTION
SIEPYEUOQ2A01G AC Drive Q2A Technical Manual 795
■ L7-36 Reg.TrqLimit Derate Freq
No.
(Hex.)
Name Description
Default
(Range)
L7-36
(1B58)
Expert
Reg.TrqLimit Derate Freq
Sets the frequency width at which L7-35 [LowF Reg.TrqLimit Lvl] operates.
6.00 Hz
(0.00 - 30.00 Hz)
If the drive detects oC [Overcurrent] faults when you connect regenerative loads at low speed, increase the setting
value. Decreases the torque limit as specified by the setting of L7-35 in a range of 0 ≤ output frequency < L7-36.
When the torque limit gradually changes as specified by the output frequency until the output frequency = L7-36,
the value changes to the settings of L7-03 [FW Reg. TrqLimit] and L7-04 [RV Reg. TrqLimit].
Note:
If you input a regenerative load at low speeds and set this parameter to a large value, it can cause the motor to rotate faster than the
speed reference. Do not set the value higher than necessary.
◆ L8: DRIVE PROTECTION
L8 parameters set protective functions that prevent faults such as overheating, phase loss, and ground faults.
■ L8-01 3%ERF DBR Protection
No.
(Hex.)
Name Description
Default
(Range)
L8-01
(04AD)
3%ERF DBR Protection
Sets the function to enable braking resistor protection with a Yaskawa ERF series braking resistor
(3% ED) installed on the heatsink.
0
(0, 1)
0 : Disabled
Disables braking resistor protection. Use this setting for dynamic braking options that are not Yaskawa ERF series
braking resistors.
1 : Enabled
Enables protection for Yaskawa ERF series braking resistors.
Note:
Set L8-01 = 1 and H2-01 to H2-03 = 4C [DO Function Select = BrkRes Fault]. Use a sequence to turn OFF power with MFDO.
■ L8-02 Overheat Alm Level
No.
(Hex.)
Name Description
Default
(Range)
L8-02
(04AE)
Overheat Alm Level
Sets the oH detection level.
Determined by o2-04 and
C6-01
(50 - 150 °C)
If the heatsink temperature is more than the temperature set in this parameter, the drive detects an overheat pre-
alarm. To enable this function, set one of H2-01 to H2-03 [DO Function Select] to 4E [Drive PreOH].
If the temperature increases to the overheat fault level, the drive will trigger an oH1 [Heatsink Overheat] fault and
stop operation.
■ L8-03 Overheat Pre-Alarm Selection
No.
(Hex.)
Name Description
Default
(Range)
L8-03
(04AF)
Overheat Pre-Alarm
Selection
Sets operation after the drive detects an oH alarm.
3
(0 - 4)
0 : Ramp->Stop
The drive ramps to stop in the selected deceleration time. Fault relay output terminal 1NO-1CM will activate, and
1NC-1CM will deactivate.
1 : Coast->Stop
The drive output shuts off and the motor coasts to stop. Fault relay output terminal 1NO-1CM will activate, and
1NC-1CM will deactivate.
2 : Fast Stop (C1-09)
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