Parameter List
3
3.11 L: Protection Functions
YASKAWA TOEPYAIGA5001A GA500 DRIVE MAINTENANCE & TROUBLESHOOTING 153
No.
(Hex.)
Name Description
Default
(Range)
L8-18
(04BE)
Software Current Limit
Selection
Set the software current limit selection function to prevent damage to the main circuit transistor
caused by too much current.
0 : Disabled
1 : Enabled
0
(0, 1)
L8-19
(04BF)
Freq Reduction @ oH Pre-
Alarm
Sets the ratio at which the drive derates the frequency reference during an oH alarm. 0.8
(0.1 - 0.9)
L8-27
(04DD)
Overcurrent Detection Gain Sets the PM motor overcurrent detection level as a percentage of the motor rated current value.
Note:
Parameter A1-02 [Control Method Selection] selects which parameter is the motor rated current.
• A1-02 ≠ 8[EZOLV]: E5-03 [PM Motor Rated Current (FLA)]
• A1-02 = 8: E9-06 [Motor Rated Current (FLA)]
300.0%
(0.0 - 1000.0%)
L8-29
(04DF)
Output Unbalance Detection
Sel
Sets the function to detect LF2 [Output Current Imbalance].
0 : Disabled
1 : Enabled
1
(0, 1)
L8-31
(04E1)
LF2 Detection Time Sets the LF2 [Output Current Imbalance] detection time. 3
(1 – 100)
L8-35
(04EC)
Installation Method
Selection
Sets the type of drive installation.
Note:
This parameter is set to the correct value when the drive is shipped.
0 : IP20/UL Open Type
1 : Side-by-Side Mounting
2 : IP20/UL Type1
3 : External Heatsink/Finless
0, 3
(0 - 3)
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)
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 : No
1 : Yes
0
(0, 1)
L8-51
(0471)
Expert
STPo I Detection Level Sets the STPo [Motor Step-Out Detected] detection level as a percentage of the motor rated current.
Note:
Parameter A1-02 [Control Method Selection] selects which parameter is the motor rated current.
• A1-02 = 5 [OLV/PM]: E5-03 [PM Motor Rated Current (FLA)]
• A1-02 = 8 [EZOLV]: E9-06 [Motor Rated Current (FLA)]
0.0%
(0.0 - 300.0%)
L8-52
(0472)
Expert
STPo Integration Level Sets the detection level for STPo [Motor Step-Out Detected] related to the ACR integral value. 1.0
(0.1 - 2.0)
L8-53
(0473)
Expert
STPo Integration Time Sets the length of time until the drive detects STPo after it is more than the value of L8-51 [STPo I
Detection Level].
1.0 s
(1.0 - 10.0 s)
L8-54
(0474)
Expert
STPo Id Diff Detection Sets the Id deviation detection function for STPo [Motor Step-Out Detected].
0 : Disabled
1 : Enabled
1
(0, 1)
L8-55
(045F)
Internal DB
TransistorProtection
Sets the protection function for the internal braking transistor.
0 : Disable
1 : Protection Enabled
1
(0, 1)
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 [Motor Step-Out Detected].
5000 ms
(100 - 5000 ms)
L8-57
(047E)
Expert
Stall Prevention Retry
Counts
Sets the number of times the acceleration stall prevention function can operate until speeds agree
before the drive detects an STPo [Motor Step-Out Detected].
10
(1 - 10 times)
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 [Motor
Step-Out Detected].
Determined by A1-02
(0 - 5000 times)
L8-93
(073C)
Expert
Low Speed Pull-out
DetectionTime
Sets the length of time the drive will wait to start baseblock after detecting LSo [Low Speed Motor
Step-Out].
1.0 s
(0.0 - 10.0 s)
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