Yaskawa F7 Drive Programming Manual - Manual (Page 84)

Programming 76
Function: V/f Control with PG Disabled
Setting: D
PG feedback input can be disabled while the Drive is running when this function is selected. However, the speed control
integral value (C5-05) is held until the run command is removed.
Open: PG feedback control enabled (closed loop)
Closed: PG feedback control disabled (open loop)
This function is available only during V/f control with PG feedback (A1-02 = 1).
Function: Terminal Not Used
Setting: F
Any digital input programmed as Term Not Used (H1-0x= F) will have no function assigned to it and it’s OPEN/CLOSED
state will not matter to the Drive’s operation.
Function: MOP Increase
Setting: 10
Function: MOP Decrease
Setting: 11
Using two digital inputs, the Drive can operate with the same type of functionality as a motor operated potentiometer (MOP).
One digital input can be programmed as an MOP Increase input (H1-0x= 10) and another digital input can be programmed as
an MOP Decrease input (H1-0x= 11). This MOP functionality is also commonly referred to as Floating Point Control,
Incremental Control or UP and DOWN Control since closing the MOP Increase input will cause the frequency reference to
increase and closing the MOP Decrease input will cause the frequency reference to decrease.
If both the MOP Increase and the MOP Decrease are closed or open simultaneously, the speed will command will not change.
The frequency reference will change at the active acceleration or deceleration rate.
MOP Increase cannot be programmed without also programming the MOP Decrease (or vice-versa) else an OPE03 fault will
occur. Setting the MOP Increase/Decrease function while the Acc/Dec Ramp Hold function is programmed into other digital
inputs will also cause an OPE03 fault.
Once the MOP function is programmed the preset speeds are disabled and the analog frequency reference input becomes a
potential frequency reference lower limit. The lower limit of the MOP function is the greater of the analog frequency reference
and the programmed frequency reference lower limit (d2-03). Once a Run command is issued the Drive will accelerate
immediately to the lower limit. The upper limit will be the Frequency Reference Upper Limit (d2-01), if used, otherwise it will
be the maximum output frequency (E1-04).
The status of the d4-01 parameter (MOP Reference Memory) will affect the performance of the Drive after power is cycled to
the Drive and a fresh Run command is issued. If d4-01= “0: Disabled”, the Run command will cause the Drive to ramp to the
frequency reference lower limit. However, if d4-01= “1: Enabled”, the Run command will cause the Drive to ramp to the last
frequency referenced by the MOP function before the Run command was removed and the power cycled. Even if d4-01= “1:
Enabled”, the previous frequency reference can be reset to the frequency reference lower limit automatically by closing either
the UP or Down input without having a Run command active.
IMPORTANT
Be sure to set b1-01= “1: Terminals”, (frequency reference Source =Terminals) if the MOP function is to be
used. If b1-01= “0: Operator”, then the MOP is disabled even if it is programmed. The Jog inputs have priority
over the MOP function.