Speed Search - Omron VARISPEED F7 User Manual

Speed Search

The speed search function detect the actual speed of a motor that is coasting without control and restart it
smoothly from that speed. It is also activated after momentary power loss detection when L2-01 is set to
enabled.
Related Parameters
Parameter
No.
b3-01
b3-02
b3-03
b3-05
b3-14
b3-17
b3-18
b3-19
L2-03
L2-04
* 1. The factory setting will cahnge when the control mode is changed (V/f control factory settings are given).
* 2. The given factory setting is valid if Heavy Duty is selected (C6-01=0, default setting). If Normal Duty 1 or 2 is selected (C6-01=1 or 2) the factory setting
will be 120%.
* 3. The factory setting depeds on the Inverter capacity. The value for a 200 V class Inverter of 0.4 kW is given.
6
Multi-function Digital Inputs
Set
Value
External search command 1
OFF: Speed search disabled (Start from lowest output frequency)
ON:
61
Speed calculation:
Calculates the motor speed, and starts search
from calculated speed
External search command 2
OFF: Speed search disabled (Start from lowest output frequency)
ON:
62
Speed calculation:
Calculates the motor speed, and starts search
from calculated speed, same operation as exter-
nal search command 1
External search command 3
64 OFF: Inverter is base blocked
ON: Inverter starts operation using speed search (same operation as speed search 2)
56
6-
Name
Speed search selection (current detection or speed calculation)
Speed search operating current (current detection)
Speed search deceleration time (current detection)
Speed search wait time (current detection or speed calculation)
Speed search rotation selection direction
Speed search retrial detection level
Speed search retrial detection time
Number of speed search retrials
Min. baseblock time
Voltage recovery time
Function
Change
Factory during
Setting Opera-
tion
* 1
2
120% *1
2.0 sec
0.2 sec
1
* 2
150%
0.01 sec
0
* 3
0.1 sec
0.3 sec
*3
Current detection:
Starts speed search from maximum output fre-
quency
Current detection:
Starts speed search from set frequency (refer-
ence frequency when search command was
input).
Control Methods
Open
V/f with
V/f Loop
PG
Vector
No A A A
No A No A
No A No A
No A A A
No A A A
No A No A
No A No A
No A No A
No A A A
No A A A
Control Methods
Open
V/f with
V/f Loop
PG
Vector
Yes No Yes
Yes No Yes
Yes Yes Yes
Closed
Loop
Vector
No
No
No
A
No
No
No
No
A
A
Closed
Loop
Vector
No
No
Yes