Chapter 12 Descriptions of Parameter SettingsC2000 Plus
12.1-11-12
The calculation equation for the motor rated torque:
Motor rated torque:
)/(
)(
).(
srad
WP
MNT
;
P(W) value = Pr.05-02 (Pr.05-14);
ω(rad/s) value = Pr.05-03 (Pr.05-15);
srad
RPM
/
60
2
11-35
Torque Command Filter Time
Default: 0.000
Settings 0.000–1.000 sec.
When time constant is too large, the control is stable, but the response is getting worse; when
it's too small, has quick response, but the control may be unstable. If you have no idea about
the best setting, you can adjust the setting according to the situation of unstable control or
delayed response.
If Pr.00-11 = 8 (SynRM sensorless), then the default becomes 0.050.
11-36
Speed Limit Selection
Default: 0
Settings 0: Set by Pr.11-37 (Forward Speed Limit) and Pr.11-38 (Reverse Speed Limit)
1: Set by Pr.00-20 (Source of Master Frequency Command) and Pr.11-37,
Pr.11-38
2: Set by Pr.00-20 (Source of Master Frequency Command).
Speed limit function: when you use the torque control mode, if the torque command is greater than
the load, the motor accelerates until the motor speed equals the speed limit. At this moment, it
switches to speed control mode to stop acceleration.
Pr.11-36 = 1:
When the torque command is positive, the forward speed limit is Pr.00-20 and the reverse
speed limit is Pr.11-38.
When the torque command is negative, the forward speed limit is Pr.11-37 and the reverse
speed limit is Pr.00-20.
Example:
In an unwinding application, if the torque command direction is different from the motor operating
direction, the load drives the motor. In this case, the speed limit must be Pr.11-37 or Pr.11-38. Only
in normal applications, when the motor drives the load and the torque command is in the same
direction as the speed limit, you can set the speed limit according to Pr.00-20.
In torque control mode, the F page of keypad displays the present speed limit value. For details
on the keypad display, refer to the LED Function Description in Chapter10 “Digital Keypad”.
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