3.10 Crane Application Setup Procedure
YASKAWA
SIEPC71061723A YASKAWA AC Drive CR700 Technical Manual
211
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Related Parameters
Table 3.18 Light-load Acceleration 2 Function Parameters
No.
Name
Adjustment Method
E1-20
UL Motor1 Sel
-
S4-01
Light-load Accel Ctrl Selection
Light-load Acceleration 2 function is enabled when
S4-01 = 2 [Light-load Accel Ctrl 2 enabled]
.
Note:
If
S4-01 ≠ 2
, then Light-load Acceleration 2 function can also be enabled by switching ON a
terminal set to
H1-xx = 36 [MFDI Function Selection = Light-load Accel 2 Enabled]
.
S4-08
Light-load 2 Activation Freq
Usually, set the 80% to 100% value of
S4-08 = E1-06 [Base Frequency]
.
S4-09
L-L 2 Motoring Limit Start Level
For the gentle acceleration start, the drive will automatically adjust the acceleration time
according to the load and the designated acceleration time, within the high speed range for
operating a motoring load (the rated output range).
Set the start level for Light-load Acceleration 2 as the motor rated output is 100%. Usually, set to
a value lower than
S4-10
. The recommended value is 50% to 80%.
S4-10
L-L 2 Motoring Hold Level
Adjust when the motor rated power is not suppressed within the high speed range for operating a
motoring load (the rated output range), even while making the acceleration time smoother.
Set the level to stop acceleration (hold acceleration) as the motor rated output is 100%. The
recommended value is 50% to 120%.
•
If the setting value is too low, the motor will not accelerate even when the load is light.
•
If the value is too high, then motor may stall along with load slipping and falling because the
drive attempt to operate at high speed when the load is heavy.
S4-11
L-L 2 Regen Limit Start Level
For the gentle acceleration, the drive will automatically adjust the acceleration time according to
the load and the designated acceleration time, within the high speed range for operating a
regenerative load (the rated output range). Set the start level for Light-load Acceleration 2 as the
motor rated output is 100%. Usually, set to a value lower than
S4-12
. The recommended value is
0% to 50%.
Note:
The motor-load rate during regenerative acceleration is a low value, only a fraction of the
power required for acceleration, and the opposite of a motoring load.
•
Motor-load rate during motoring acceleration = Load mo Power needed to accelerate
the load
•
Motor-load rate during regenerative acceleration = (Load motoring) × (-1) + Power needed
to accelerate the load
Slowly adjust the acceleration time within the high speed range (the rated output range) with
S4-
17
to ensure the load detection in regeneration operation. Also set
S4-11 = 0% to 50%
.
S4-12
L-L 2 Regen Hold Level
Sets the level at which the drive stops accelerating (to hold acceleration) as a percentage of the
motor rated output for when the motor output power is not kept within the high speed range (the
rated output range) while working with a regenerative load. (Usually, set between 50% and 120%)
•
If the setting value is too low, the motor will not accelerate even when the load is light.
•
If the value is too high, then motor may stall along with load slipping and falling because the
drive attempt to operate at high speed when the load is heavy.
S4-13
L-L 2 Limit Timer
Prevents the motor from re-accelerating when there is a momentary light-load situation, or when
hanging load arrives on the ground in a crane application.
The drive stops acceleration after the time set passes if the extended acceleration time or the
acceleration hold time in the high-speed range continues for the time set in
S4-13
or longer.
Usually, set between 50% and 100% of the acceleration time in the high-speed range.
S4-14
L-L 2 Fault Operation Selection
-
S4-15
L-L 2 Fault Detection Level
Sets the detection level to trigger protection operation when the motor output power is not
suppressed even if the drive automatically adjusts the acceleration time to make it smoother or
even stopping acceleration.
Set the level at which a fault is detected during Light-load Acceleration 2 as the motor rated
current is 100% to
S4-15
. The recommended value is 100% to 150%.
Usually, set
S4-16
between 0.1 s and 1.0 s.
S4-16
L-L 2 Fault Detection Time
S4-17
L-L 2 Accel Time Gain
Adjusts the acceleration time beyond the range set in
S4-08
to detect load power with greater
precision, and decrease the effect of the power required for acceleration.
The actual acceleration time is as follows.
C1-01, C1-03, C1-05, C1-07 [Acceleration Times] × S4-17
Usually, set
S4-17 = 1.5 to 3.0
.
Note:
If
S4-17 = 1.0
, the acceleration time will be exactly what is set in
C1-01, C1-03, C1-05, and
C1-07.
S4-18
L-L 2 Select during Regeneration
Disables
S4-18
when there is not enough load power for detection during regeneration due to the
effect of the power needed for acceleration.
Even when Light-load Acceleration 2 is enabled, if
S4-18
is disabled, then the frequency will not
increase above the value set for Light-load Acceleration 2 in
S4-08
during regeneration.
Note:
Make sure that proper safety measures are in place on the machine side to detect if the load
falls when using Light-load Acceleration 1 or Light-load Acceleration 2.
S4-21
L-L 2 Deceleration Width for oL6
-
S4-22
L-L 2 Freq Upper Limit Select
-
S4-23
Hold Clear FREQ
-
S4-24
Auto Spe Ctrl Sel @UL
-
Содержание CR700
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