L8: Drive Protection - YASKAWA CIPR-GA50C series Technical Manual

12.9 L: Protection Functions
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L7-06: Torque Limit Integral Time
No.
Name
(Hex.)
L7-06 Torque Limit Integral Time
(04AC)
Decrease the setting value to increase torque limit responsiveness when you use torque limits and L7-07 = 1
[Torque Limit during Accel/Decel = Proportional & Integral control].
If there is hunting when torque limits are active, increase the setting value.
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L7-07: Torque Limit during Accel/Decel
No.
Name
(Hex.)
L7-07 Torque Limit during Accel/
Decel
(04C9)
0 : Proportional only
The torque limit function works with proportional control during acceleration and deceleration, and switches to
integral control at constant speed. Use this setting when quickly reaching the target speed is more important than
the torque limit during speed changes.
1 : Proportional & Integral control
The torque limit function always uses integral control. Use this setting when a very accurate torque limit is
necessary during speed changes, for example in winding machine applications.
If you make the torque limit the most important, it can:
• Increase the acceleration and deceleration times.
• Not let the motor speed reach the frequency reference value during run at constant speed.
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L7-16: Torque Limit Process at Start
No.
Name
(Hex.)
L7-16 Torque Limit Process at
Start
(044D)
0 : Disabled
There is torque limit at start without a delay time.
Use this setting to maximize the response time when sudden acceleration or deceleration at start is necessary.
1 : Enabled
There is a delay time of 64 ms at start to build the torque limit.
◆

L8: Drive Protection

L8 parameters set protective functions that prevent faults such as overheating, phase loss, and ground faults.
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L8-01: 3% ERF DB Resistor Protection
No.
Name
(Hex.)
L8-01 3% ERF DB Resistor
Protection
(04AD)
0 : No
Disables braking resistor protection. Use this setting for dynamic braking options that are not Yaskawa ERF series
braking resistors.
1 : Yes
Enables protection for Yaskawa ERF series braking resistors.
Note:
Set L8-01 = 1 and H2-01 to H2-03 = D [MFDO Function Select = Braking Resistor Fault]. Use a sequence to turn OFF power with
MFDO.
702
V/f OLV OLV/PM OLV/PM AOLV/PM EZOLV
Sets the integral time constant for the torque limit function.
V/f OLV OLV/PM AOLV/PM EZOLV OLV/PM
Sets the torque limit function during acceleration and deceleration.
V/f OLV OLV/PM AOLV/PM EZOLV OLV/PM
Assigns a time filter to allow the torque limit to build at start.
V/f OLV OLV/PM AOLV/PM EZOLV OLV/PM
Sets the function to enable braking resistor protection with a Yaskawa ERF series braking resistor
(3% ED) installed on the heatsink.
Description
Description
Description
Description
YASKAWA SIEPC71061753A GA500 Technical Manual
Default
(Range)
200 ms
(5 - 10000 ms)
Default
(Range)
0
(0, 1)
Default
(Range)
1
(0, 1)
Default
(Range)
0
(0, 1)