2-72 Parameter Descriptions
7000-TD002A-EN-P – September 2007
Torque Command 0 Sensorless [TrqCmd0 SensrLss]
Linear Number: 86
Default Value: 0.40
Minimum Value: 0.00
Maximum Value: 4.00
Access Level: Advanced
Read/Write: Read/Write
This parameter specifies the value of the torque command at zero speed used in starting mode. It may be
higher or lower than TrqCmd1 Snsrless (87). If this parameter is set too low the motor may not start. If it
is set too high the start will be excessively rough and noisy. A value of 1.00 corresponds to rated motor
torque. This parameter has no effect if the optional tachometer or encoder feedback is enabled.
Torque Command 1 Sensorless [TrqCmd1 SensrLss]
Linear Number: 87
Default Value: 0.40
Minimum Value: 0.00
Maximum Value: 4.00
Access Level: Advanced
Read/Write: Read/Write
This parameter specifies the value of the torque command at the speed when the drive switches to close-
loop after an open loop start. It may be higher or lower than TrqCmd0 Snsrless. In starting mode, the
torque command changes linearly from TrqCmd0 Snsrless at zero speed to TrqCmd1 Snsrless at close-
loop speed. When the drive switches from starting mode to normal running mode and the speed regulator
is released, the torque command is initially equal to the value of this parameter. If it is set too low, the
motor may stall before the speed regulator has time to increase the torque command. If it is set too high,
the motor will accelerate very rapidly after the transition until the speed regulator is able to decrease the
torque command to the value required to follow the speed ramp. A value of 1.00 corresponds to rated
motor torque. This parameter has no effect if the optional tachometer or encoder feedback is enabled.
Torque Command External [Trq Cmd External]
Linear Number: 91
Default Value: 0.000
Minimum Value: -4.000
Maximum Value: 4.000
Access Level: Advanced
Read/Write: Read/Write
This parameter specifies the external torque command. The function of this parameter depends on the
parameter Torque Control Mode. A value of 1.00 corresponds to rated motor torque. Note that motoring
torque is positive for forward rotation and negative for reverse rotation.
Torque Control Mode Setting Torque Command External effect
Zero Torque None
Speed Regulation None
External Torque Command Used as the External Torque Command
Speed Torque Positive Sets Positive Torque Limit
Speed Torque Negative Sets Negative Torque Limit
Speed Summation Added to the Speed Regulator Output
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