Continuing Operation
6-
55
n
Speed
Search
Selection
Set
whether to enable or disable speed search at startup, and set the type of speed search (estimated speed or
current
detection) using setting b3-01. To perform speed search when inputting the run command, set b3-01 to
1
or 3.
n
Estimated
Speed
Search
The
time chart for estimated speed searches is shown below.
Search
at
Startup
The
time chart for when speed search at startup and speed search to multi-function input terminals us shown
below.
Fig 6.42 Speed Search at Startup (Estimated Speed)
Table 6.1 Search Methods
Search
Name
Estimated
Speed
Current
Detection
Search
Method
Estimates
the motor speed when the search
starts,
and accelerates and decelerates from the
estimated
speed to the set frequency. You can
also
search including direction of motor rota-
tion.
Starts
speed search from the frequency when
the
temporary power loss was detected, or from
the
highest frequency, and performs speed
detection
at the current level during the search.
External
Speed Search
Command
External
search command 1 and external
search
command 2 become the same operation,
estimating
the motor speed and starting the
search
from the estimated speed.
External
speed search command 1:
Starts
speed search from the maximum output
frequency.
External
speed search command 2:
Starts
speed search from the frequency refer-
ence
set before the search command.
Application
Precau-
tions
Cannot
be used multi-motor drives, motors two
or
more frames smaller than the Inverter capac-
ity,
and high-speed motors (130 Hz min.)
In
control method without PG, the motor may
accelerate
suddenly with light loads.
Run command
Output frequency
Output current
OFF
ON
b3-02
Start using
speed detected
Set frequency
reference
1.0 s
Minimum baseblock time (L2-03) x 0.7
Lower limit set using Speed Search Wait Time (b3-05).
Note: If the stopping method is set to coast to stop, and the run command turns ON in a short time,
the operation may be the same as the search in case 2.
Summary of Contents for SYSDRIVE 3G3RV
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