IMPULSE
®
•G+ & VG+ Series 4 Technical Manual
November 2020
Page 123
The switching frequency (D04-07) can also be controlled with a digital input programmed to “ASR gain switch”
(H01-xx = 37). When the terminal is open, the VFD uses the ASR gain level set by the pattern in Figure 5-19
above. When the terminal closes, D04-03 is used. The integral time set to D04-02 is used to change linearly
between these settings, as shown in Figure 5-20 below. The ASR gain switch command from a multi-function input
terminal overrides the switching frequency set to D04-07.
Figure 5-20: ASR Proportional Gain Switch
5.3.5 Torque Control
Please consult factory for application assistance regarding torque control. Typically, torque control should not be
applied on a hoist.
This function is used to avoid excessive changes in torque, which may be caused by abnormal resonance when
the torque reference changes rapidly.
Table 5-48: Torque Control Parameter Settings
* Cannot set D05-01 = 1 for NLB Hoist; use Load Share MFDI (H01-xx = 66) instead.
NOTE: Speed/torque control selection can also be made by using a multi-function input select
(H01-xx = 34 speed-torque control changeover).
Parameter Display Function Range Default
D05-01 Torq Control Sel Determines whether Speed or Torque Control is
selected.
0, 1 0
0 Speed Control Speed Control enabled with torque limit
1 Torque Control* Torque control enabled with speed limit.
D05-02 Torque Ref Filter Primary delay time for Torque Reference Input. 0–1000 ms 0
D05-03 Speed Limit Sel Speed Limit Selection (Figure 5-21 on page 124)1, 2 2
0 Fref Limit Limit set by the frequency reference in B01-01.
1 Speed Limit Sel Limit set by D05-04.
D05-04 Speed Lmt Value Speed Limit Value (% of E01-04) -120–120% 105
D05-05 Speed Lmt Bias Speed Limit Bias (% of E01-04) 0–120% 10
D05-06 Ref Hold Time Speed/Torque Switching Timer 0–1000 ms 0
D05-08 Drctn SpdLmt Sel Parameter D05-08 selects how the speed limit
bias is applied.
0, 1 1
0 Disabled
1 Enabled
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