5.2 b: Application
118
YASKAWA ELECTRIC
SIEP C710606 44B YASKAWA AC Drive T1000V Technical Manual
Table 5.5 Speed Search Activation by Digital Inputs
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).
L2-01: Momentary Power Loss Operation Selection on page 189
.
• 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-
= 8 or 9, N.O. and N.C.,
respectively) is released.
■
b3-01: Speed Search Selection at Start
Selects if Speed Search is automatically performed when a Run command is issued.
Setting 0: Disabled
Speed Search is not automatically performed. It can be activated using a digital input.
Setting 1: Enabled
Speed Search is performed with every Run command.
■
b3-02: Speed Search Deactivation Current
Sets Speed Search operating current as a percentage of the drive rated current. If the current falls below this level while
performing Current Detection Speed Search then Speed Search will be finished and normal operation will resume.
Normally there is no need to change this setting. If the drive won’t run after a restart, lower this value.
■
b3-03: Speed Search Deceleration Time
Parameter b3-03 sets the output frequency reduction ramp used by Current Detection Speed Search (b3-24 = 0) and by
the Current Injection Method of Speed Estimation (b3-24 = 1). The time entered into b3-03 will be the time to decelerate
from maximum frequency (E1-04) to minimum frequency (E1-09).
Setting
Description
b3-24 = 0
b3-24 = 1
61
External Search
Command 1
Closed: Activate Current Detection Speed
Search from the maximum output frequency
(E1-04).
Activate Speed Estimation Speed Search
62
External Search
Command 2
Closed: Activate Current Detection Speed
Search from the frequency reference.
No.
Parameter Name
Setting Range
Default
b3-01
Speed Search Selection at Start
0 or 1
0
No.
<1> Default setting depends on the control mode selection in parameter A1-02. The value shown here is for V/f Control.
Dependent Parameter Default Values on page 364
.
Name
Setting Range
Default
b3-02
Speed Search Deactivation Current
0 to 200%
120%
No.
Name
Setting Range
Default
b3-03
Speed Search Deceleration Time
0.1 to 10.0 s
2.0 s
