Chapter 12 Descriptions of Parameter SettingsC2000 Plus
12.1-10-10
Only bit = 0 is used for closed-loop; other bits are used for open-loop.
10-25
FOC Bandwidth for Speed Observer
Default: 40.0
Settings 20.0–100.0 Hz
Setting the speed observer to a higher bandwidth could shorten the speed response time but
creates greater noise interference during the speed observation.
10-26
FOC Minimum Stator Frequency
Default: 2.0
Settings 0.0–10.0% fN
Set the stator frequency lower limit in operation status. This setting ensures the stability and
accuracy of observer and avoids interferences from voltage, current and motor parameters. fN
is the motor rated frequency.
10-27
FOC Low Pass Filter Time Constant
Default: 50
Settings 1–1000 ms
Set the low pass filter time constant of a flux observer at start-up. If you cannot activate the motor
during high speed operation, lower the setting for this parameter.
10-28
FOC Gain of Excitation Current Rise Time
Default: 100
Settings 33–300%Tr (Tr: rotor time constant)
Set the drive’s excitation current rise time when it activates IM FOC / TQC sensorless speed
tracking. When the drive’s activation time is too long in torque mode, adjust this parameter to a
shorter time value. Tr is the rotor time constant.
In IM VF / SVC control modes, the excitation current rise time of Pr.07-12 = 4 (Speed tracking
by the motor vector flux) also refers to this parameter.
10-29
Upper Limit of Frequency Deviation
Default: 20.00
Settings 0.00–200.00 Hz
Limits the maximum frequency deviation.
If you set this parameter too high, an abnormal PG feedback malfunction occurs.
If the application needs a higher setting for Pr.10-29, note that a higher setting results in larger
motor slip, which causes a PG Error (PGF3, PGF4). In this case, you can set Pr.10-10 and Pr.10-
13 to 0 to disable PGF3 and PGF4 detection, but you must make sure the PG wiring and
application are correct; otherwise, it may lose the instant PG protection. Setting Pr.10-29 too
high is not commonly done.
10-30
Resolver Pole Pair
Default: 1
Settings 1–50
To use the Pr.10-30 function, you must set Pr.10-00 = 3 (Resolver Encoder) first.
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