12.8 L: PROTECTION
674 SIEPCYEUOQ2V01A Q2V Technical Manual
• With a regenerative converter, for example D1000.
• With a regenerative unit, for example R1000.
• When connecting braking resistor options to the drive, for example CDBR units.
• Without an internal braking transistor.
1 : Enabled
Protects internal braking transistor when using a braking transistor or optional braking resistors.
■ L8-56: StallP@Acc Activation Time
No.
(Hex.)
Name Description
Default
(Range)
L8-56
(047D)
Expert
StallP@Acc 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: StallP Retry Counts
No.
(Hex.)
Name Description
Default
(Range)
L8-57
(047E)
Expert
StallP 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 Detect Level
No.
(Hex.)
Name Description
Default
(Range)
L8-90
(0175)
Expert
STPo Detect Level
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: Lso Detect Time
No.
(Hex.)
Name Description
Default
(Range)
L8-93
(073C)
Expert
Lso Detect Time
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: Lso Detect Level
No.
(Hex.)
Name Description
Default
(Range)
L8-94
(073D)
Expert
Lso Detect Level
Sets the detection level for LSo [Low Speed Motor Step-Out] as a percentage of E1-04 [Max
Output Frequency].
3%
(0 - 10%)
■ L8-95: Lso Amount
No.
(Hex.)
Name Description
Default
(Range)
L8-95
(077F)
Expert
Lso Amount
Sets the average count of LSo [Low Speed Motor Step-Out] detections.
10
(1 - 50 times)
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