3.10 Crane Application Setup Procedure
212 YASKAWA SIEPC71061723A YASKAWA AC Drive CR700 Technical Manual
Note:
Consider the target frequency reference as the maximum output frequency. The limit start level and the hold level are calculated
differently when motoring and during regeneration.
• Set the value of S4-10 × η
2
(0.9
2
= 0.81) to S4-12 as a target value. If there is no problem with the default setting of 100%, then there is
no need to change S4-12, because it will not get any higher than the target frequency.
• Separate calculations are used when motoring and during regeneration. As a result, the speed is not the same when hoisting the load
and when lowering it.
■ Multi-Funciton Digital Input
H1-xx Setting Name Description
36 Light-load Accel 2 Enabled
ON: Enabled
OFF: Disabled
Table 3.19 Requirement for Enabling Light-load Acceleration
MFDI Function Settings S4-01 Setting Light-load Accel 2 Enable/Disable
H1-xx = 36 Digital Inputs
OFF
Unrelated to settings
The output frequency will not exceed S4-08.
ON
Light-load Acceleration 2 is enabled.
H1-xx ≠ 36
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.
■ Description of Operation
The following is an example of drive operation while motoring.
S4-08 - Light-load 2 Activation Freq
S4-09 - L-L 2 Motoring Limit Start Level
S4-10 - L-L 2 Motoring Hold Level
Note:
The dotted line indicates where the drive output still has headroom. Speed loss (stalling) will actually occur if the drive has insufficient
power.
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