YASKAWA GA800 Series, Техническое описание

Страница: 928 / 1016

12.9 L: Protection Functions
928 YASKAWA SIEPC71061737B GA800 Drive Technical Reference
■
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 [FreqReference Loss Detect Select = Run@L4-06PrevRef] 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.
The drive can do a self-diagnostic check and continue the operation after a fault. If the cause of the fault goes away,
the drive does speed search and restarts. It will not stop and the drive will not record a fault history. Use
L5-02 [Fault
Contact at Restart Select] to select the operation of fault relay signals during Auto Restart operation.
Sets if the drive will do Auto Restart and the number of times the drive will try to do Auto Restart in a set time. If the
number of Auto Restart tries is more than the set value during the set time, drive output shuts off and operation stops.
If this happens, remove the cause of the fault and manually restart the drive.
The drive can do Auto Restart when these faults occur:
V/f CL-V/f OLV CLV AOLV OLV/PM OLV/PM AOLV/PM CLV/PM EZOLV
V/f CL-V/f OLV CLV AOLV OLV/PM OLV/PM AOLV/PM CLV/PM EZOLV
V/f CL-V/f OLV CLV AOLV OLV/PM OLV/PM AOLV/PM CLV/PM EZOLV