YASKAWA T1000A - Page 161

5.4 d: Reference Settings
YASKAWA ELECTRIC SIEP C710616 30B YASKAWA AC Drive T1000A Technical Manual 161
Parameter Details
5
Setting 1: Enabled
Torque Control is always enabled.
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d5-02: Torque Reference Delay Time
A filter with the time constant set in parameter d5-02 can be applied to the torque reference signal in order to eliminate
oscillation that results from an unstable torque reference signal. A higher filter time will stabilize control, but also reduce
the responsiveness.
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d5-03: Speed Limit Selection
Parameter d5-03 determines how the speed limit is set.
Setting 1: Frequency Reference Input
The frequency reference value at the active reference source (digital operator, External reference 1 or External reference
2) will be used as speed limit. Note that in this case all settings for accel/decel times (C1-01 to C1-08) and S-curves (C2-
01 to C2-04) will apply for the speed limit.
Setting 2: Parameter d5-04
The speed limit is set by parameter d5-04.
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d5-04: Speed Limit
Sets the speed limit during torque control if parameter d5-03 is set to 2. Refer to Speed Limitation and Speed Limit Bias
on page 159.
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d5-05: Speed Limit Bias
Using d5-05 a bias can be applied to the speed limit value. The bias is set as a percentage of the maximum output
frequency. Refer to Speed Limitation and Speed Limit Bias on page 159.
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d5-06: Speed/Torque Control Switchover Time
Sets the delay time for switching from Speed Control to Torque Control and vice versa.
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d5-08: Unidirectional Speed Limit Bias
Parameter d5-08 selects how the speed limit bias is applied.
Setting 0: Disabled
The speed limit bias is applied in both directions, the speed limit and the opposite direction.
Setting 1: Enabled
The speed limit bias is applied in the opposite direction of the speed limit only.
No. Parameter Name Setting Range Default
d5-02 Torque Reference Delay Time 0 to 1000 ms Determined by A1-02
No. Parameter Name Setting Range Default
d5-03 Speed Limit Selection 1, 2 1
No. Parameter Name Setting Range Default
d5-04 Speed Limit -120 to 120% 0%
No. Parameter Name Setting Range Default
d5-05 Speed Limit Bias 0 to 120% 10%
No. Parameter Name Setting Range Default
d5-06 Speed/Torque Control Switchover Time 0 to 1000 ms 0 ms
No. Parameter Name Setting Range Default
d5-08 Unidirectional Speed Limit Bias 0 or 1 1