YASKAWA CR700, Technical Manual

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Parameter
Details
11
11.5 d: References
YASKAWA SIEPC71061723A YASKAWA AC Drive CR700 Technical Manual 631
Note:
When you energize the drive, continuously enable the MFDI terminal set for Accel/Decel Ramp Hold [H1-xx = A] . If the digital input is
not ON, the drive will clear the hold value and set it to 0 Hz.
Figure 11.45 Frequency Reference Hold with Accel/Decel Hold Function
• Up/Down Command
When you clear the Run command or de-energize the drive, it will save the frequency reference value. The drive
will use the saved value as the frequency reference when it restarts.
Remove the Saved Frequency Reference Value
The procedure to remove the saved frequency reference value is different for different functions. Use these
methods to remove the value:
• Release the input programmed for Accel/Decel Ramp Hold [H1-xx = A] .
• Set an Up or Down command while no Run command is active.
■
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.
◆
d6: Field Forcing
d6 parameters
set the field forcing functions.
The Field Forcing function adjusts the delaying influence of the motor time constant when the drive changes the
excitation current reference and it also increases motor responsiveness. The function improves the development of
the actual motor excitation current with a high motor excitation current reference only to energize the drive.
Consequently, if the Field Forcing function is enabled, motor responsiveness will be better.
Note:
You cannot use Field Forcing during DC Injection Braking.
■
d6-03: Field Forcing Selection
No.
(Hex.)
Name Description
Default
(Range)
d6-03
(02A2)
Field Forcing Selection
Sets the field forcing function.
0
(0, 1)
V/f CL-V/f OLV CLV AOLV
V/f CL-V/f OLV CLV AOLV