Parameter Details
12
12.9 L: Protection Functions
YASKAWA SIEPC71061705H GA700 Series Technical Manual 917
■ L8-57: Stall Prevention Retry Counts
No.
(Hex.)
Name Description
Default
(Range)
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)
Note:
If this value is too small, it can cause incorrect detection of STPo. If this value is too large, the drive will not detect STPo.
■ L8-90: STPo Detection Level (Low Speed)
No.
(Hex.)
Name Description
Default
(Range)
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)
This function detects when PM motors are not synchronized.
The drive cannot detect when motors are not synchronized because the frequency reference is low during start up
and the motor is locked. If fault detection is necessary in these conditions, set the control fault detection level to
enable detection of desynchronization because of motor locking. Increase the setting in 5-unit increments.
■ L8-93: Low Speed Pull-out DetectionTime
No.
(Hex.)
Name Description
Default
(Range)
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)
Set this parameter to 0.0 to disable the function.
■ L8-94: Low Speed Pull-out Detect Level
No.
(Hex.)
Name Description
Default
(Range)
L8-94
(073D)
Expert
Low Speed Pull-out Detect
Level
Sets the detection level for LSo [Low Speed Motor Step-Out] as a percentage of E1-04 [Maximum
Output Frequency].
3%
(0 - 10%)
■ L8-95: Low Speed Pull-out Amount
No.
(Hex.)
Name Description
Default
(Range)
L8-95
(077F)
Expert
Low Speed Pull-out
Amount
Sets the average count of LSo [Low Speed Motor Step-Out] detections.
10
(1 - 50 times)
◆ L9: Drive Protection 2
L9 parameters are used to configure the protection function used to detect cooling fan faults.
■ L9-16: FAn1 Detect Time
No.
(Hex.)
Name Description
Default
(Range)
L9-16
(11DC)
Expert
FAn1 Detect Time
Sets the detection time for FAn1 [Drive Cooling Fan Fault]. Yaskawa recommends that you do
not change this parameter value.
4.0 s
(0.0 - 30.0 s)
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