Yaskawa 2Y25-0423.pdf - Manual (Page 12)

Rel. 09/15/2000 Page 12 of 13 Doc. No. 02Y00025-0423
For the sake of determining the frequency ratio, assume that parameter P1-03 is set to 0.00%.
This would make the frequency at the same as at .
Frequency Ratio:
With all of the above equations solved, the frequency ratio can now be determined. Ideally, P1-01
would equal the frequency at
, and P1-02 would equal the frequency at , however, only whole
numbers can be entered into P1-01 and P1-02.
In order to solve this problem, multiply both frequencies by 10, 100, 1000, or 10000. Seek the
highest numbers possible without exceeding 10000.
Frequency at
= 0.39Hz
Frequency at = 54.17Hz
Therefore:
P1-01 = 54.17Hz * 100 = 5417
Because the frequency at
was multiplied by 100, the frequency at needs to be multiplied by
100 also.
P1-02 = 0.39Hz * 100 = 39
Enter these values into the drive.
Other Programming Considerations:
There are many parameters in the drive which will effect how closely the follower will track the
master. Below is a list of the most commonly used parameters with the PG-W2 option card.
Parameter Description
b1-01
Reference Source - This parameter should be set to a value of 5, which will force
the drive’s frequency reference to come from the PG-W2 option card. Other
reference sources can be used. See the GPD515 Technical manual TM4515.
C1-01 Acceleration Rate - To achieve maximum response from the follower, this
parameter needs to be set to a value lower (faster) than the maximum expected
rate of speed change. This parameter can be set all the way down to zero.
For more information, consult the GPD515 Technical manual TM4515.
C1-02 Deceleration Rate - Same considerations as Acceleration Rate.
C5-01 ASR Gain - The higher this number is set, the closer the follower will track, but if
this number is set too high, the follower will become unstable. This parameter will
only be available when in the Flux Vector or V/f w/PG feedback modes.
C5-02 Integral Time - The lower this number is set, the closer the follower will track, but
if this number is set too low, the follower can become unstable. This parameter
will only be available when in the Flux Vector or V/f w/PG feedback modes.
E1-04 Maximum Output Frequency - This parameter needs to be set to a high enough
value. Be careful not to exceed the motor manufacturer’s speed rating.