YASKAWA GA800 Series, Техническое описание

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Parameter
Details
12
12.5 d: References
YASKAWA SIEPC71061737B GA800 Drive Technical Reference 751
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d4-09: Up/Down 2 Bias Lower Limit
No.
(Hex.)
Name Description
Default
(Range)
d4-09
(02B0)
RUN
Up/Down 2 Bias Lower
Limit
Sets the lower limit of the Up/Down 2 bias as a percentage of the Maximum Output Frequency.
0.0%
(-99.9 - 0.0%)
The drive saves the set bias lower limit in d4-06 [Frequency Ref Bias (Up/Down 2)] . Set d4-09 to an applicable value
before you use the Up/Down 2 function.
Note:
When d4-01 = 1 [Freq Reference Hold Selection = Enabled] and b1-01 = 0 [Frequency Reference Selection 1 = Keypad] , the drive will add
the bias value to the frequency reference when it does not receive an Up/Down 2 command for 5 s. Then the drive will reset the value to 0.
If you increase the bias with the Up 2 command and d4-09 = 0 , you cannot use a Down 2 command to decrease the frequency reference. To
decrease speed in this condition, set a negative lower limit in d4-09 .
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d4-10: Up/Down Freq Lower Limit Select
No.
(Hex.)
Name Description
Default
(Range)
d4-10
(02B6)
Up/Down Freq Lower Limit
Select
Sets the lower frequency limit for the Up/Down function.
0
(0, 1)
0 : Greater of d2-02 or Analog
The higher value between d2-02 [Frequency Reference Lower Limit] and an analog input programmed for Frequency
Reference [H3-02, H3-06, H3-10 = 0]
sets the lower frequency reference limit.
Note:
When you use External Reference 1/2 Selection [H1-xx = 2] to switch between the Up/Down function and an analog input as the reference
source, the analog value becomes the lower reference limit when the Up/Down command is active. Set d4-10 = 1 to isolate the Up/Down
function and the analog input value.
1 : d2-02
You can only use d2-02 to set the lower limit of the frequency reference.
◆
d5: Torque Control
d5 parameters set the Torque Control function.
The Torque Control function controls the output torque of the motor. You can use Torque Control for roller drives,
winders, unwinders, conveyors and other machines that use tension control and push/pull applications. When there is
no more material and the machine suddenly has no load, the drive uses Torque Control and the speed limit function to
keep the rotation speed of the motor from increasing.
Set A1-02 [Control Method Selection] to one of these values to use Torque Control:
•
3 [Closed Loop Vector]
•
4 [Advanced Open Loop Vector]
•
6 [PM Advanced Open Loop Vector]
•
7 [PM Closed Loop Vector]
Note:
When you use Torque Control and A1-02 = 4 , use a motor designed for winding applications.
Use one of these methods to enable Torque Control:
• Set d5-01 = 1 [Torque Control Selection = Torque Control] .
• Set H1-xx = 71 [Torque Control] ON.
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Torque Control Operation
Figure 12.68 shows the operation principle of Torque Control.
V/f CL-V/f OLV CLV AOLV OLV/PM OLV/PM AOLV/PM CLV/PM EZOLV
V/f CL-V/f OLV CLV AOLV OLV/PM OLV/PM AOLV/PM CLV/PM EZOLV