3 Startup Procedure and Test Run
184
YASKAWA ELECTRIC
SIEP C710617 19A YASKAWA AC Drive CR700 Technical Manual
Set
H1-xx = 30 [MFDI Function Selection = Light-load Accel 1 Enabled]
to program a digital input to enable/
disable Light-load Acceleration 1. Set
S4-01 = 1 [Light-load Accel Ctrl Selection = Light-load Accel Ctrl 1
enabled]
to have Light-load Acceleration 1 enabled all the time.
Note:
•
The distance required for the crane to stop when the Run command is switched OFF is determined by the speed of the crane. Higher
speeds have longer stopping distances. Switch OFF the Run command with an sufficient distance when in high speed operation.
•
The output current may increase after Light-load Acceleration is executed.
Related Parameters
Table 3.16 Light-load Acceleration 1 Function Parameters
No.
Name
Adjustment Method
S4-01
Light-load Accel Ctrl Selection
-
S4-02
Light-load 1 Max. Freq(FWD)
Set the output frequency after Light-load Acceleration, and within the motor
and crane specifications. If
S4-02
or
S4-03
is more than
E1-04 [Maximum
Output Frequency]
, set the output frequency after increasing the speed up to
E1-04
.
Note:
If
E1-04
is changed, the drive will automatically change the acceleration/
deceleration rate accordingly.
S4-03
Light-load 1 Max. Freq(REV)
S4-04
Light-load 1 Detect Torque (FWD)
Usually, set
S4-04 = 50%
and
S4-05 = 50%
. The setting is determined by
the motor specifications.
S4-05
Light-load 1 Detect Torque (REV)
S4-06
Light-load 1 Detect Frequency
Usually, set
S4-06 = E1-06 [Base Frequency]
.
S4-07
Light-load 1 Detect Time
Usually, set
S4-07 = 1 s
.
•
If setting is too short, then the drive may not be able to accurately detect
the load, and this can cause the crane to oscillate.
•
If setting is too long, the effectiveness of shortening the operation time
will decrease.
Light-load 1 Torque Bias (FWD)
Sets the mechanical loss of the crane.
Light-load 1 Torque Bias (REV)
*1
This parameter is enabled when
A1-02 = 2, 4 [Control Method Selection = Open Loop Vector, Advanced Open Loop Vector]
.
Multi-Funciton Digital Input
Table 3.17 Requirement for Enabling Light-load Acceleration
H1-xx
Setting
Value
Name
Description
30
Light-load Accel 1 Enabled
ON: Enabled
OFF: Disabled
MFDI Function Settings
S4-01 Setting
Light-load Accel 1 Enable/Disable
H1-xx = 30
Digital Inputs
OFF
Unrelated to settings
The output frequency will not exceed
S4-06
.
ON
Light-load Acceleration 1 is enabled.
H1-xx ≠ 30
1: Light-load Accel Ctrl 1 enabled
Light-load Acceleration 1 is enabled.
2: Light-load Accel Ctrl 2 enabled
Light-load Acceleration 2 is enabled.
0: Light-load Accel Ctrl disabled
Light-load Acceleration 1 and 2 are disabled. Uses the
frequency reference to run the motor.
