Parameter Details
11
11.9 L: Protection Functions
YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual 985
■ L8-53: STPo Integration Time
No.
(Hex.)
Name Description
Default
(Range)
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)
■ L8-54: STPo Id Diff Detection
No.
(Hex.)
Name Description
Default
(Range)
L8-54
(0474)
Expert
STPo Id Diff
Detection
Sets the Id deviation detection function for STPo [Desynchronization
Error].
1
(0, 1)
0 : Disabled
1 : Enabled
■ L8-55: Internal DB TransistorProtection
No.
(Hex.)
Name Description
Default
(Range)
L8-55
(045F)
Internal DB
TransistorProtection
Sets the protection function for the internal braking transistor.
1
(0, 1)
0 : Disable
Disables braking transistor protection.
Use this setting, if enabling the braking transistor can cause an rF [Braking Resistor Fault] in these conditions:
• 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 : Protection Enabled
Prevents damage to the internal braking transistor when using a braking transistor or optional braking resistors.
These models have a built-in braking transistor:
• 2004 to 2138
• 4002 to 4168
■ 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 [Desynchronization
Error].
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 match before the drive detects an STPo
[Desynchronization Error].
10 times
(1 - 10 times)
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