TB Wood's X4, User Manual, Page: 70 / 98

X4 AC Drive User’s Manual Chapter 7: X4 Parameters
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523 Id Percent Default: Read-only
Range: 0 - 200%
Level 2
This parameter shows the Flux producing current (as a percentage of motor rated current) that is being applied to the
drive.
524 Iq Percent
Default: Read-only
Range: 0 - 200%
Level 2
This parameter shows the Torque producing current (as a percentage of motor rated current) that is being applied to
the drive.
525 Power Fail Config Default: CTS No Msg
Range: n/a
Level 2
This parameter can be used to define how the drive responds to an undervoltage operation when parameter 502 is set
for Vector or Linear Auto mode. The following data values may be assigned to this parameter:
Parameter Value Description
CTS No Msg The drive will coast to a stop when an undervoltage condition (power-down) is detected.
Coast Stop The drive will coast to a stop when an undervoltage condition (power-down) is detected. In this
mode, however, the drive will generate an undervoltage fault, which will be registered in the fault
log.
Ramp Down With this setting, if power is lost, the drive ramps the motor down at a decel rate of Decel 1. When
the drive is fully ramped down, the drive will generate an undervoltage fault. If power is restored,
the drive will continue to ramp to a stop and will fault.
Quick Ramp Same as Ramp Down, except the shorter ramp time (Decel 1 or Decel 2) will be used.
Controlled With this setting, if power is lost, the drive decelerates the motor, trying to regulate the bus voltage
to the undervoltage level. If power is restored, the drive accelerates to the command frequency
without faulting. If the drive reaches the stopped condition, it will generate an undervoltage fault.
ContrNoMsg Same as Controlled, but without generating an undervoltage fault.
Note: Current limit is only available when Parameter 502 is set to Linear Auto. If Parameter 502 is set to Vector, then
the Current Limiting values will actually be Torque Limiting values.
526 UV Ride-Thru En Default: w/ LVT
Range: n/a
Level 2
This parameter allows the function to disable either (a) undervoltage ride-through or (b) continuous Line Voltage
Tracking (LVT) that produces dynamic Undervoltage Ride-Thru Thresholds. The following data values may be
assigned to this parameter:
Parameter Value Description
Disabled This turns off the Undervoltage Ride-Thru function.
w/ LVT This enables the standard Ride-Thru algorithm in the V/Hz modes and allows the choice of
algorithm in the Linear Auto and Vector modes.
w/o LVT This option operates in the same way as “w/ LVT” except that the Line Voltage Tracker function of
the Undervoltage Ride-Thru is not active. The Line Voltage will be estimated on powering up the
drive.
Table 7-2: Description of X4 Parameters (Page 13 of 26)