YASKAWA OYMC V1000

1.2 b: Application
54 YASKAWA ELECTRIC SIEP C710606 10A YASKAWA AC Drive - V1000 PRELIM. Programming Manual
Figure 1.16
Figure 1.16 Current Detection Speed Search at Start or external Speed Search
Note: When the Run command is set the drive waits at least for 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.
■ 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 (refer to b3-01: Speed Search Selection at Start on
page 55). With this setting external Speed Search commands are disregarded.
2. By digital inputs:
The following input functions for H1- can be used.
Run command
Output
frequency
Output current
OFF ON
b3-02
Decel time set
set to b3-03
Waits for twice
as long as L2-04
Selected
frequency
reference
Minimum Baseblock Time (L2-03)
Max. output frequency
or the specified
frequency reference