Parameter Details
2
2.9 L: Protection Functions
YASKAWA TOEPYAIGA5002A GA500 DRIVE PROGRAMMING 385
Enables the detection of a loss of an analog frequency reference when MFAI terminals (A1 and A2) input the
frequency reference. Set H2-01 to H2-03 = C [MFDO Function Selection = 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 2.116 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
■ L4-08: Speed Agree Source Selection
No.
(Hex.)
Name Description
Default
(Range)
L4-08
(047F)
Speed Agree Source
Selection
Sets the drive to use the soft starter output frequency or the motor speed (estimation value) for speed
detection.
0
(0, 1)
0 : Softstarter Output (Reference)
1 : Motor Speed (Actual Speed)
The setting for L4-08 has an effect:
• When you set detection conditions for oL3 [Overtorque 1], oL3 [Overtorque Detection 1], oL4 [Overtorque 2], and
oL4 [Overtorque Detection 2]:
– L6-01 = 1, 3, 5, 7 [Torque Detection Selection 1 = UL @ Speed Agree]
– L6-04 = 1, 3, 5, 7 [Torque Detection Selection 2 = UL @ Speed Agree]
• When you use speed agreement with DriveWorksEZ.
• When the MFDI terminals set for H1-xx = 75, 76 [Up/Down 2 command] activate.
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