B3-02 speed search deactivation current, B3-03 speed search deceleration time – Yaskawa iQpump Controller Programming Manual User Manual

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YASKAWA TM.iQp.07 iQpump Controller Programming Manual

Figure 1.24

Figure 24. Speed Search (Current Detection Method) after momentary power loss

where the power loss time exceeds the minimum baseblock time

◆

b3-02 Speed Search Deactivation Current

Setting Range:

0 ~ 200% of the iQpump drive rated output current

Factory Default: 120% of the iQpump drive rated output current

When using the current detection method of Speed Search, parameter b3-02 sets the current level that will determine when the search is
complete and the rotor and output speeds match. When the output frequency is higher than the actual rotor speed, the slip causes the
current to be high. As the output frequency is lowered, the closer it comes to the rotor speed, the lower the current draw will be. When the
output current drops below the level as set in b3-02 (100% = iQpump drive Rated Current) the output frequency stops decreasing and
normal operation resumes.

◆

b3-03 Speed Search Deceleration Time

Setting Range:

0.1 ~ 10.0 s

Factory Default: 2.0 s

Parameter b3-03 sets the deceleration ramp used by the current detection method of Speed Search when searching for the motor’s rotor
speed. Even if Speed Search 2 is selected, for Speed Search at start, the time entered into b3-03 will be the time to decelerate from
maximum frequency (E1-04) to minimum frequency (E1-09).

Setting of b3-01

Automatic Speed Search for all RUN

commands

Automatic Speed Search after

momentary power loss and baseblock

Speed Search Used for Run with

programmed multi-function input

Yes - Speed Estimation

Yes - Current Detection

AC power supply

Output frequency

Output current

OFF

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)

Deceleration time set in b3-03