12.9 L: Protection Functions
1006 YASKAWA SIEPC71061737D GA800 Drive Technical Reference
■ L8-56: Stall P @ Accel Activation Time
No.
(Hex.)
Name Description
Default
(Range)
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)
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.
■ L8-57: 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)
To Next Page
Loading...
