Fuji Electric FRENIC-Ace series - Speed Control

5.3 Description of Function Codes
5-230
■ Notch filter resonance frequency (d07/A49/b49/r49), Notch filter attenuation level (d08/A50/b50/r50)
These function codes specify speed control using notch filters. The notch filters make it possible to decrease the
speed loop gain only in the vicinity of the predetermined resonance points, suppressing the mechanical resonance.
The notch filters are available only under “vector control with speed sensor.”
Setting the speed loop gain at a high level in order to obtain quicker speed response may cause mechanical
resonance. If it happens, decreasing the speed loop gain the speed response will be slower in the whole operating
range. In such a case, using the notch filter makes it possible to decrease the speed loop gain only in the vicinity of
the predetermined resonance points and set the speed loop gain at a high level in other operating points, enabling
a quicker speed response in the whole operating range.
The following four types of notch filters can be specified.
Function code Name Data setting range Unit Default setting
d07/A49/b49/r49
Speed control 1, 2, 3, 4
(Notch filter resonance frequency)
1 to 200 Hz 200
d08/A50/b50/r50
Speed control 1, 2, 3, 4
(Notch filter attenuation level)
0 to 20 dB 0 (Disable)
Setting the notch filter attenuation level to “0” (dB) disables the corresponding notch filter.
■ Select speed control parameter 1, 2 -- “MPRM1”, “MPRM2” (E01 toE05 data = 78, 79)
The combination of the ON/OFF states of digital input signals “MPRM1” and “MPRM2” selects one between 4
different speed control parameter sets.
Refer to “5.3.7 b, r codes (Speed control 3 and 4 parameters)”
■ ASR switching time (d25)
Speed control parameters switching by “MPRM1” and “MPRM2” signals is possible even during motor drive
operation. For example, speed control P (Gain) and I (Integral time) listed can be switched. Switching these
parameters during operation may cause an abrupt change of torque and result in a mechanical shock, depending
on the driving condition of the load. To reduce such a mechanical shock, the inverter decreases the abrupt torque
change using the ramp function of ASR switching time (d25).
• Data setting range: 0.000 to 1.000 (s)
d09, d10
d11, d12
H147
Speed control (Jogging) (Speed command filter and Speed detection filter)
(P (Gain) and I (Integral time), FF(Gain) )
(Refer to d01.)
These function codes are used to set up the speed control during jogging operation.
The block diagrams and function codes related to jogging operation are the same as for normal operation.
Since this speed control setting is exclusive to jogging operations, specify these function codes to obtain higher
speed response to obtain smooth jogging operation.
For details, refer to the corresponding descriptions (d01 to d05) about the speed control sequence for normal
operation.
Speed control parameters Jogging operation Normal operation
Speed command filter d09 d01
Speed detection filter d10 d02
P (Gain) d11 d03
I (Integral time) d12 d04
FF(Gain) H147 d05