YASKAWA L1000A Technical Manual page 230

5.8 L: Protection Functions
L4-05: Speed Reference Loss Detection Selection
■
The drive can detect a loss of an analog speed reference from input A1 and A2. Speed reference loss is detected when the
speed reference falls below 10% of the previous reference, or below 5% of the maximum output frequency within 400 ms.
Figure 5.38
Parameter L4-05 selects the operation when a speed reference loss is detected.
No.
L4-05
Setting 0: Stop
Drive follows the speed reference (which is no longer present) and simply stops the motor.
Setting 1: Continue operation with reduced speed reference
The drive will continue the operation at the speed reference value set in parameter L4-06. When the external speed
reference value is restored, the operation is continued with the external speed reference.
L4-06: Speed Reference at Reference Loss
■
Sets the speed reference level the drive runs with when L4-05 = 1 and a reference loss was detected. The value is set as a
percentage of the speed reference before the loss was detected.
No.
L4-06
L4-07: Speed Agree Detection Selection
■
Note: Available in drive software PRG: 7017 or later.
Determines when speed detection is active using parameters L4-01 through L4-04.
No.
L4-07
Setting 0: No detection during baseblock
Setting 1: Detection always enabled
L4-13: Door Zone Level
■
Sets the speed level for the car door to open. Once the car slows to the speed set in L4-13, a multi-function output terminal
set for "Door zone reached" will close (H2- = 52).
No.
L4-13
230
Analog
speed
reference
400 ms
Figure 5.38 Loss of Reference Function
Parameter Name
Speed Reference Loss Detection Selection
Parameter Name
Speed Reference at Reference Loss
Parameter Name
Speed Agree Detection Selection
Parameter Name
Door Zone Level
YASKAWA ELECTRIC SIEP C710616 38F YASKAWA AC Drive - L1000A Technical Manual
100%
10%
common_TMonly
Setting Range
0 or 1
Setting Range
0.0 to 100.0%
Setting Range
0 or 1
Setting Range
0.0 to 100.0%
Default
0
Default
80.0%
Default
0
Default
0.0%