Specifications
YASKAWA Inverter Drive A1000 – Crane Software Application Manual
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• A Run Command in the opposite direction is entered
• An external baseblock command is entered
It is important to keep in mind that the crane’s stopping distance is determined by its speed. Therefore, care should be
taken when setting Ultra Lift 1 parameters to ensure that the stopping distance is safe.
Ultra Lift 1 Time Chart
The following time chart shows drive operation when the Ultra Lift 1 Function is activated through the S4-01 parameter.
7.4.2 Ultra Lift Acceleration Function 2
The Ultra Lift Acceleration Function 2 can be used to smoothen the acceleration time in order to protect a heavy load and
to avoid a situation where the motor could stall and the load slip. When the function is activated and the drive detects that
output power has reached a predefined value, the acceleration time is scaled to limit the kinetic energy of the load. The
Ultra Lift 2 function can be activated using parameter S4-01 or by setting one of the drive’s multi-function digital inputs to
36 with parameters H3-01 through -10. In this section the parameters that influence the Ultra Lift 2 Acceleration Function
are described, the drive’s operation in Ultra Lift 2 is detailed, and a time chart of the function is shown.
Ultra Lift Acceleration Function 2 Parameters (S4-)
S4-08 Ultra Lift 2 Activation Frequency (FAM2)
: Sets the output frequency threshold from which the Ultra Lift 2 function
can be activated. This parameter is usually set to a value close to the motor’s base frequency (E1-06).
No. Parameter Name Setting Range Default
S4-08
Ultra Lift 2 Activation Frequency 0 to 200 Hz 50 Hz
S4-09 Ultra Lift 2 Motoring Limit Start Level (LGS): Sets the power threshold when motoring from which the drive’s
acceleration rate is lengthened when the Ultra Lift 2 Activation Frequency FAM2 has been reached. This parameter is set
as a percentage of motor rated power, and the typical setting range is between 50 and 80%.
S4-10 Ultra Lift 2 Motoring Hold Level (LGH)
: Sets the power threshold when motoring from which the drive stops all
acceleration in order to maintain output power. This parameter is set as a percentage of motor rated power, the typical
setting is between 50 and 120%, and its value should be above that of the Ultra Lift 2 Motoring Limit Start Level LGS. If
set too low, the drive will halt acceleration even with a light load and the crane’s operation time will be lengthened. If set
too high, even heavy loads will reach high speeds and the motor may stall, causing the load to slip.
S4-11 Ultra Lift 2 Regen Limit Start Level (LRS)
: Sets the power threshold when regenerating from which the drive’s
acceleration rate is lengthened when the Ultra Lift 2 Activation Frequency FAM2 has been reached. This parameter is set
as a percentage of motor rated power, and the typical setting range is between 0 and 50%. It is important to note that
when regenerating, the motor load rate during acceleration is lower than when the drive is motoring, because the force of
the load is in the opposite direction.
S4-12 Ultra Lift 2 Regen Hold Level (LRH)
: Sets the power threshold when regenerating from which the drive stops all
acceleration in order to maintain output power. This parameter is set as a percentage of motor rated power, the typical
setting is between 50 and 120%, and its value should be above that of the Ultra Lift 2 Regen Limit Start Level LRS. If set
too low, the drive will halt acceleration even with a light load and the crane’s operation time will be lengthened. If set too
Time
OutputFrequency
FrequencyReference
FWD(REV)RunCmd
TorqueReferenceITR
LowSpeed
HighSpeed
LowSpeed
FAD
IFAT(IRAT)
1/3TA 2/3TA
TA
HighSpeed
RunsatFreqReforFAMF(FAMR),
whicheverislower
FAD = UltraLift1DetectionFrequency(S4‐06)
FAMF =UltraLift1MaxFrequencyFWD(S4‐02)
FAMR=UltraLift1MaxFrequencyREV(S4‐03)
IFAT =UltraLift1DetectionTorqueFWD(S4‐04)
IRAT =UltraLift1DetectionTorqueREV(S4‐05)
TA =UltraLift1DetectionTime(S4‐07)