6. Description of Parameters
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6.5.7 SVC Speed Feedback Stability
Function Code Parameter Name Setting Range Default
F2-07
Speed feedback lter time in
SVC
0.000s to 1.000s 0.015s
This parameter takes effect only when F0-01 = 0. You can improve motor stability by increasing
F2-07. Be aware that this may slow dynamic response. Decreasing it will obtain quick system
response but may lead to motor oscillation. Adjustment of this parameter is not required normally.
6.5.8 Torque Limit
The torque limit function can be used to limit torque to protect the system. The torque limit can
be either set by parameters in group F2 or by parameters in group A0.
Output torque must be limited when the AC drive is in speed control or in torque control
(determined by A0-00) in FVC (F0-01 = 1). Torque limit varies with control mode.
Function Code Parameter Name Setting Range Default
A0-00
Speed/Torque control
selection
0: Speed control
1: Torque control
0
This function parameter determines whether the AC drive is in speed control or torque control.
The AC drive has two digital input functions related to torque control, function 29
"
Torque control
prohibited" and function 46 "Speed control/Torque control". The two functions must be used
together with parameter A0-00 to implement switchover between speed control and torque
control.
● When function 46 is enabled, the control mode is determined by setting of A0-00.
● When function 46 is disabled, the control mode is reverse to setting of A0-00.
● When function 29 is enabled, the AC drive always run in speed control no matter whether
function 46 is enabled or disabled.
■
Setting Torque Limit in Speed Control
Function Code Parameter Name Setting Range Default
F2-09
Torque limit source in speed
control
0: F2-10
1: AI1
2: AI2
3: AI3
4: Pulse reference (DI5)
5: Serial comms.
6: Min. (AI1, AI2)
7: Max. (AI1, AI2)
0
F2-10
Digital setting of torque limit
in speed control
0.0% to 200.0% 150.0%
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