Yaskawa G7 Drive - Manual (Page 281)

6
-64
Fig 6.45 Speed Search at Startup (Using Current Detection)
Speed Search after Short Baseblock (during Power Loss Recovery, etc.)
• Loss Time Shorter Than Minimum Baseblock Time
Fig 6.46 Speed Search After Baseblock (Current Detection: Loss Time < L2-03)
• Loss Time Longer Than Minimum Baseblock Time
Fig 6.47 Speed Search After Baseblock (Current Detection: Loss Time > L2-03)
Run command
Output frequency
Output current
OFF ON
b3-02
Deceleration time set in b3-03
Set frequency
reference
Minimum baseblock time
(L2-03)
Maximum output
frequency or
set frequency
* Lower limit is set using Speed Search Time (b3-05). *
AC power supply
Output frequency
Output current
OFF ON Output frequency before power loss Set frequency
reference
Minimum baseblock time (L2-03)
*1 Baseblock time may be reduced by the output frequency
immediately before baseblock.
*2 After AC power supply recovery, motor waits for the minimum
Speed Search Wait Time (b2-03).
Deceleration
time set in b3-03
b3-02
speed search operating current
*2
*1
AC power supply
Output frequency
Output current
OFF ON Output frequency before power loss
Set frequency
reference
Minimum baseblock time
(L2-03)
Deceleration speed set in b3-03
b3-02
Speed search operating time
Speed search wait time (b3-05)