YASKAWA V1000 Technical Manual page 127

When Speed Search is applied using an external Search command or automatically with the Run command, the drive waits
for the minimum baseblock time L2-03 before Speed Search is started. If L2-03 is smaller than the time set in parameter
b3-05, b3-05 is used as the wait time.
Run command
Output current
Figure 5.14 Current Detection Speed Search at Start or external Speed Search
Note: When the Run command is set the drive waits until the Speed Search Wait Time (b3-05) before Speed Search is performed, even if the
Minimum Baseblock Time is set to smaller values than b3-05.
Notes on Using Current Detection Type Speed Search
• Increase the voltage recovery ramp time set to L2-04 if a Uv1 fault occurs when performing Current Detection Speed
Search.
• Shorten the Speed Search deceleration time set to b3-03 if an oL1 fault occurs while performing Current Detection Speed
Search.
• Current Detection Speed Search is not available when using Open Loop Vector Control for PM motors.
• Increase the minimum baseblock time set to L2-03 if an overcurrent fault occurs when performing Speed Search after
power is restored following a momentary power loss.
n Activation of Speed Search
Speed Search can be activated as described below. Independent of the activation method the Speed Search type must be
selected in parameter b3-24.
1. Automatically at every Run command
setting external Speed Search commands are disregarded.
2. By digital inputs:
The following input functions for H1-oo can be used.
Setting
61
62
To activate Speed Search by a digital input the input must always be set together with the Run command.
3. After automatic fault restart
Set the number of maximum fault restarts in parameter L5-01 higher than 0.
4. After momentary power loss
The following parameter settings are necessary:
Enable Power Loss Ride-Thru selection by setting L2-01 to 1 (enabled) or 2 (enabled during CPU operation). •
to L2-01: Momentary Power Loss Operation Selection on page
Set the number of maximum fault restarts in parameter L5-01 higher than 0. •
5. After baseblock is released
The drive will resume the operation starting with Speed Search if the Run command is present and the output frequency
is above the minimum frequency when the Baseblock command (H1-oo = 8 or 9, N.O. and N.C., respectively) is
released.
YASKAWA ELECTRIC SIEP C710606 16C YASKAWA AC Drive – V1000 Technical Manual
Decel time set
set to b3-03
OFF ON
Max. output frequency
or the specified
frequency reference
Output
frequency
Minimum Baseblock Time (L2-03)
(Refer to b3-01: Speed Search Selection at Start on page
Table 5.5 Speed Search Activation by Digital Inputs
Description
Closed: Activate Current Detection Speed
External Search
Search from the maximum output frequency
Command 1
Closed: Activate Current Detection Speed
External Search
Search from the frequency reference if b3-01
Command 2
Waits for twice
as long as L2-04
b3-24 = 0
(E1-04).
is set to 0.
207.
5.2 b: Application
Selected
frequency
reference
b3-02
128). With this
b3-24 = 1
Activate Speed Estimation
Speed Search
–
Refer
5
127