11.9 L: Protection Functions
966 YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual
■ L4-03: Speed Agree Detection Level(+/-)
No.
(Hex.)
Name Description
Default
(Range)
L4-03
(049B)
Speed Agree
Detection Level(+/-)
Sets the level to detect speed agree or motor speed.
Determined by A1-02
(Determined by A1-
02)
Sets the level to detect speed agree or motor speed when H2-01 to H2-03 = 13, 14, 15, 16 [MFDO Function
Select = Speed Agree 2, User-set Speed Agree 2, Frequency Detection 3, Frequency Detection 4].
■ 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
Select = 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 11.140 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 [FreqReference Loss Detect Select = Run@L4-06PrevRef] to enable this parameter.
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