YASKAWA GA700 Series Technical Manual page 730

12.5 d: References
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.
■
d4-11: Bi-directional Output Selection
No.
Name
(Hex.)
d4-11 Bi-directional Output
Selection
(02B7)
0 : Disabled
The drive will not change the frequency reference or PID output value to Bi-Directional internal frequency
reference.
When the frequency reference or PID output value is 0% to 100% of the maximum output frequency, the drive
runs the motor in the set direction.
1 : Enabled
Changes the frequency reference or PID output value to Bi-Directional output.
When the frequency reference or PID output value is 0% to 50%, the drive reverses the motor in the set direction.
When the frequency reference or PID output value is 50% to 100%, the drive operates the motor in the set
direction.
Note:
When you use the Bi-Directional function with PID control, you can use an MFDI terminal set for PID Bi-Directional Enable [H1-xx =
7F] to enable/disable the Bi-Directional function.
Table 12.42 shows how the drive operates when you use the PID control function with the Bi-Directional function
and d4-11 = 1:
b5-01 [PID Mode Setting] Setting
b5-01 = 0 [Disabled]
b5-01 ≠ 0 [Enabled]
• When PID Control is Disabled or H1-xx = 19 [MFDI Function Select = PID Disable] is Activated
When the frequency reference is 0% to 50%, the drive reverses the motor in the set direction. When the
frequency reference is 50% to 100%, the drive operates the motor in the set direction.
frequency reference change at this time. This is an example of operation when the Forward Run command is
input.
Figure 12.70 Frequency Reference Transition when PID Control is Disabled or PID Disable is ON
Note:
When b1-04 = 1 [Reverse Operation Selection = Reverse Disabled], the drive will not run in Reverse. The frequency reference limit is
0 Hz.
• When PID Control is Enabled and H1-xx = 7F [PID Bi-Directional Enable] is Activated
The Bi-Directional function is enabled. When the frequency reference is 0% to 50% after PID control execution,
the drive runs the motor opposite of the set direction. When the frequency reference is 50% to 100%, the drive
runs the motor in the set direction.
example of the operation when the Forward Run command is input.
730
V/f CL-V/f OLV CLV
Sets the function that changes the frequency reference to a Bi-Directional internal frequency
reference.
Table 12.42 Bi-Directional Function Operation Conditions
Status of MFDI Terminal Set for 7F [PID Bi-Directional Enable]
Bi-Directional function enabled
Bi-Directional function enabled
Figure 12.71 shows the frequency reference change at this time. This is an
Description
AOLV OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
ON
Bi-Directional function enabled
Normal operation (Bi-Directional function disables)
YASKAWA SIEPC71061705H GA700 Series Technical Manual
Default
(Range)
0
(0, 1)
OFF
Figure 12.70 shows the