Rockwell Automation 1557 MEDIUM VOLTAGE AC DRIVE - Manual (Page 69)

PARAMETER AND VARIABLE DESCRIPTIONS 6-13
1557-UM050F-EN-P – June 2013
Speed Feedback Mode [Speed fdbk mode]
Linear number:
89
Minimum value: 0
Maximum value: 1
Default value: 0
This parameter specifies the type of speed feedback used.
0
stator frequency with slip compensation
1 tachometer/encoder
The drive automatically switches to stator frequency feedback when a tach loss fault occurs. If the tach loss
fault is successfully cleared the drive switches back to tach feedback mode.
Torque Control Mode [Trq control mode]
Linear number:
90
Minimum value: 0
Maximum value: 5
Default value: 1
This parameter specifies the torque control mode.
0 zero torque
1 speed regulator
2 external torque command
3 speed regulator with external positive torque limit
4 speed regulator with external negative torque limit
5 sum of speed regulator and external torque command
Torque Command External [Trq command ext]
Linear number:
91
Minimum value: -1.500
Maximum value: 1.500
Default value: 0.000
The function of this parameter depends on the torque control mode:
0
not used
1 not used
2 torque command
3 positive torque limit
4 negative torque limit
5 torque command
A value of 1.00 corresponds to rated motor torque. Note that motoring torque is positive for forward rotation
and negative for reverse rotation.
Prior to Rev 4.60/5.00, this parameter was scaled in per unit based on the motor rated kVA and was about 10%
lower.