Parameter List
10
10.11 L: Protection Functions
YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual 577
No.
(Hex.)
Name Description
Default
(Range)
Ref.
L8-35
(04EC)
Installation Method
Selection
Sets the type of drive installation.
0 : IP20/Open-Chassis enclosure
1 : Side-by-Side Mounting
2 : IP21/NEMA Type 1/IP55
3 : Finless / External Heatsink
Determined by the
drive model
(0 - 3)
983
L8-38
(04EF)
Carrier Frequency
Reduction
Sets the carrier frequency reduction function. The drive reduces the
carrier frequency when the output current is more than a specified
level.
0 : Disabled
1 : Enabled below 6 Hz
2 : Enabled for All Speeds
Determined by A1-
02, C6-01, and o2-
04
(0 - 2)
983
L8-40
(04F1)
Carrier Freq
Reduction Off-
Delay
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)
984
L8-41
(04F2)
High Current
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 : Disabled
1 : Enabled
0
(0, 1)
984
L8-51
(0471)
Expert
STPo I Detection
Level
Sets the STPo [Desynchronization Error] detection level as a
percentage of the output current.
0.0%
(0.0 - 300.0%)
984
L8-52
(0472)
Expert
STPo Integration
Level
Sets the detection level for STPo [Desynchronization Error] related
to the ACR integral value.
1.0
(0.1 - 2.0)
984
L8-53
(0473)
Expert
STPo Integration
Time
Sets the length of time until the drive detects STPo after exceeding
the value of L8-51 [STPo I Detection Level].
1.0 s
(1.0 - 10.0 s)
985
L8-54
(0474)
Expert
STPo Id Diff
Detection
Sets the Id deviation detection function for STPo
[Desynchronization Error].
0 : Disabled
1 : Enabled
1
(0, 1)
985
L8-55
(045F)
Internal DB
TransistorProtec
tion
Sets the protection function for the internal braking transistor.
0 : Disable
1 : Protection Enabled
1
(0, 1)
985
L8-56
(047D)
Expert
Stall P @ Accel
Activation Time
Sets the length time that the acceleration stall prevention function
can continue to operate before the drive detects an STPo
[Desynchronization Error].
5000 ms
(100 - 5000 ms)
985
L8-57
(047E)
Expert
Stall Prevention
Retry Counts
Sets the number of times the acceleration stall prevention function
can operate until speeds match before the drive detects an STPo
[Desynchronization Error].
10 times
(1 - 10 times)
985
L8-90
(0175)
Expert
STPo Detection
Level (Low Speed)
Sets the detection level that the control fault must be equal to or
more than to cause an STPo [Desynchronization Error].
Determined by A1-
02
(0 - 5000 times)
986
L8-93
(073C)
Expert
Low Speed Pull-
out DetectionTime
Sets the length of time the drive will wait to start baseblock after
detecting LSo [LSo Fault].
1.0 s
(0.0 - 10.0 s)
986
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