IMPULSE®•G+ & VG+ Series 4 Instruction Manual – February 2017
5-34
This traverse torque limiter function (C07-10 and C07-11) is used in multi-drive, closed-loop traverse
applications to reduce drive fighting due to speed discrepancies between the two sides of a bridge.
This resolves the situation where one side of a bridge will be at full forward torque, while the other
side is a full regen torque. When moving below the Limiter Freq, this feature is disabled and the drive
behaves as normal. When accelerating past the Limiter Freq, the ASR I time is reduced to zero to
limit torque imbalance. Once the motor has accelerated to within the Limiter Freq (i.e. 60 Hz) the
regen torque limit also goes to zero. The drive will remain in this state until the speed reference is
changed. When the speed reference is raised or lowered, regen torque is re-enabled to accel or
decel the bridge as required.
Note that a heavy swinging load may pull the bridge faster than the PG Overspeed level. It is
therefore highly suggested that a PG Overspeed Sel (F01-23) be set to Alarm Only.
C07-05 T-Lim FWD Gain Torque Limit gain in FWD direction
when MFDI = 14 is ON. Gain is
applied to C07-01. If T-Lim by
Analog Input is used, gain is
applied to post-scaled/biased
input.
0.00–2.55 1.25 G+/VG+
C07-06 T-Lim REV Gain Torque Limit gain in REV direction
when MFDI = 14 is ON. Gain is
applied to C07-02. If T-Lim by
Analog Input is used, gain is
applied to post-scaled/biased
input.
0.00–2.55 1.25 G+/VG+
C07-07 T-Lim RGN Gain Torque Limit gain in RGN mode
when MFDI = 14 is ON. Gain is
applied to C07-03 and C07-04. If
T-Lim by Analog Input is used,
gain is applied to post-scaled/
biased input.
0.00–2.55 1.25 G+/VG+
C07-08 Trq Lim I Time Sets the integral time constant for
the torque limit. (OLV only)
5–10000 ms 200 G+
C07-09 Torque Limit Sel Torque Limit Control Method
Selection during Accel/Decel
0, 1 0 G+
0 P-ctrl @ Acc/
Dec
Changes to integral control at
constant speed. Use this setting
when acceleration to the desired
speed should take precedence
over the torque limit.
1 I-ctrl @ Acc/
Dec
Integral control. Set L07-07 to 1 if
the torque limit should take
precedence. (OLV only)
C07-10 Trav Trq Limiter ASR I time is forced to 0 when the
output frequency is greater than
the C07-11 speed window. When
using this feature, it is suggested
that the Overspeed Detect Level
(F01-24) be increased to 110% to
avoid overspeed faults.
0, 1 0 G+/VG+
0 Disabled
1 Enabled
C07-11 Limiter Freq Sets the frequency window (+/-)
size for Traverse Torque Limiter
(C07-10) when at speed.
0.5–10.0 2.0 G+/VG+
Parameter Display Function Range Default Model
x = Available in the specified drive/control method
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