Parameter Details
11
11.5 d: References
YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual 789
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 11.43 shows how the drive operates when you use the PID control function with the Bi-Directional function
and d4-11 = 1:
Table 11.43 Bi-Directional Function Operation Conditions
b5-01 [PID Mode Setting] Setting
Status of MFDI Terminal Set for 7F [PID Bi-Directional Enable]
ON OFF
b5-01 = 0 [Disabled] Bi-Directional function enabled Bi-Directional function enabled
b5-01 ≠ 0 [Enabled] Bi-Directional function enabled Normal operation (Bi-Directional function
disables)
• 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. Figure 11.69 shows the
frequency reference change at this time. This is an example of operation when the Forward Run command is
input.
Figure 11.69 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. Figure 11.70 shows the frequency reference change at this time. This is an
example of the operation when the Forward Run command is input.
Figure 11.70 Frequency Reference Transition when PID Control and PID Bi-Directional are Enabled
Note:
When b1-04 = 1, the drive will not run the motor in Reverse. The frequency reference limit is 0 Hz.
• When PID Control is Enabled and H1-xx = 7F is Deactivated
The Bi-Directional function is disabled. When the frequency reference is a negative value after PID control
execution, the drive runs the motor opposite of the set direction. The frequency reference value is an absolute
value.
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