12.8 L: PROTECTION
668 SIEPCYEUOQ2V01A Q2V Technical Manual
■ L7-16: TrqLimit@Start
No.
(Hex.)
Name Description
Default
(Range)
L7-16
(044D)
TrqLimit@Start
Assigns a time filter to allow the torque limit to build at start.
1
(0, 1)
0 : Disabled
There is torque limit at start without a delay time.
Use this setting to maximize the response time when sudden acceleration or deceleration at start is necessary.
1 : Enabled
There is a delay time of 64 ms at start to build the torque limit.
◆ 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 [MFDO 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 in temperature.
Determined by o2-04, 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 [MFDO 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 the operation of drives when an oH alarm is detected.
3
(0 - 4)
0 : Ramp->Stop
The drive ramps the motor to stop in the deceleration time. The output terminal set for Fault [H2-01 to H2-03 =
3] activates.
1 : Coast->Stop
The output turns off and the motor coasts to stop. The output terminal set for Fault [H2-01 to H2-03 = 3]
activates.
2 : Fast Stop (C1-09)
The drive stops the motor in the deceleration time set in C1-09 [Fast Stop Time]. The output terminal set for Fault
[H2-01 to H2-03 = 3] activates.
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