12.8 L: PROTECTION
780 SIEPYEUOQ2A01A AC Drive Q2A Technical Manual
■ L8-40 Carrier Red Off-Delay Time
No.
(Hex.)
Name Description
Default
(Range)
L8-40
(04F1)
Carrier Red Off-Delay Time
Sets the length of time until the automatically reduced carrier frequency returns to the condition
before the reduction.
Determined by A1-02
(0.00 - 2.00 s)
Set L8-40 ≠ 0.00 to enable the carrier frequency reduction function during start-up. When operation starts, the
drive automatically decreases the carrier frequency. When the time set in L8-40 is expired, the carrier frequency
returns to the value set in C6-02 [Carrier Frequency Selection].
When L8-38 ≠ 1 [Carrier Reduction Mode = Enabled], the drive applies L8-40 as the time for the carrier
frequency to return to its configured value after it is decreased.
■ L8-41 HCA alarm Selection
No.
(Hex.)
Name Description
Default
(Range)
L8-41
(04F2)
HCA alarm Selection
Sets the function to cause an HCA [Current Alarm] when the output current is more than 150% of
the drive rated current.
0
(0, 1)
0 : Disabled
The drive will not detect HCA [Current Alarm].
1 : Enabled
If the output current is more than 150% of the drive rated current, the drive will detect HCA.
The MFDO terminal set for an alarm [H2-01 to H2-03 = 4] activates.
■ L8-51 STPo Current Level
No.
(Hex.)
Name Description
Default
(Range)
L8-51
(0471)
Expert
STPo Current Level
Sets the STPo [Desynchronization Error] detection level as a percentage of the output current.
0.0%
(0.0 - 300.0%)
The detection level is automatically calculated when L8-51 = 0.
■ L8-52 STPo Integral Level
No.
(Hex.)
Name Description
Default
(Range)
L8-52
(0472)
Expert
STPo Integral Level
Sets the detection level for STPo [Desynchronization Error] related to the ACR integral value.
1.0
(0.1 - 2.0)
■ L8-53 STPo Integral Time
No.
(Hex.)
Name Description
Default
(Range)
L8-53
(0473)
Expert
STPo Integral Time
Sets the length of time until the drive detects STPo after exceeding the value of L8-51 [STPo
Current Level].
1.0 s
(1.0 - 10.0 s)
■ L8-54 STPo Id Diff Detection
No.
(Hex.)
Name Description
Default
(Range)
L8-54
(0474)
Expert
STPo Id Diff Detection
Sets the Id deviation detection function for STPo [Desynchronization Error].
1
(0, 1)
0 : Disable
1 : Enabled
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