12.9 L: Protection Functions
986 YASKAWA SIEPC71061737D GA800 Drive Technical Reference
■ L4-04: Speed Agree Detection Width (+/-)
No.
(Hex.)
Name Description
Default
(Range)
L4-04
(049C)
Speed Agree Detection
Width (+/-)
Sets the width to detect speed agree or motor speed.
Determined by A1-02
(Determined by A1-02)
Sets the width to detect speed agree or motor speed when H2-01 to H2-03 = 13, 14, 15, 16 [MFDO Function
Selection = Speed Agree 2, User-set Speed Agree 2, Frequency Detection 3, Frequency Detection 4].
■ L4-05: Fref Loss Detection Selection
No.
(Hex.)
Name Description
Default
(Range)
L4-05
(049D)
Fref Loss Detection
Selection
Sets the operation when the drive detects a loss of frequency reference.
0
(0, 1)
Enables the detection of a loss of an analog frequency reference when the frequency reference is input from the MFAI
terminals (A1, A2, and A3). Set H2-01 to H2-03 = C [MFDO Function Select = Frequency Reference Loss] to enable
this function.
If the frequency reference is less than 10% in 400 ms, the drive detects frequency reference loss.
Figure 12.136 Detection of Frequency Reference Loss
0 : Stop
The drive follows the frequency reference and stops the motor.
1 : Run at (L4-06 x Last Reference)
The drive continues to operate at the frequency reference value set in L4-06 [FreqReference at Reference Loss]. When
you return the external frequency reference value, the drive continues to operate with the frequency reference.
■ L4-06: Frequency Reference @Loss of Ref
No.
(Hex.)
Name Description
Default
(Range)
L4-06
(04C2)
Frequency Reference @Loss
of Ref
Sets the frequency reference as a percentage to continue drive operation after it detects a frequency
reference loss. The value is a percentage of the frequency reference before the drive detected the loss.
80.0%
(0.0 - 100.0%)
Set L4-05 = 1 [Fref Loss Detection Selection = Run at (L4-06 x Last Reference)] to enable this parameter.
■ L4-07: Speed Agree Detection Selection
No.
(Hex.)
Name Description
Default
(Range)
L4-07
(0470)
Speed Agree Detection
Selection
Sets the condition that activates speed detection.
0
(0, 1)
0 : No Detection during Baseblock
Detects the frequency while the drive is operating. When the drive turns off its output, it will not detect frequency.
1 : Detection Always Enabled
◆ L5: Fault Restart
The Auto Restart function tries to keep machines operating when the drive detects a transient fault.
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