Yaskawa F7 Drive Programming Manual - Manual (Page 50)

Programming 42
d4 Sequence
d4-01 MOP Reference Memory
The Drive offers the capacity to change the frequency reference much the way a Motor Operated Potentiometer (MOP) would.
Using programmed digital inputs configured as MOP Increase (H1-0x= 10) and MOP Decrease (H1-0x= 11), the Drive will
increase the frequency reference whenever the MOP Increase input is closed and decrease the frequency reference whenever
the MOP Decrease is closed. The frequency reference will remain constant whenever both inputs are open or closed.
Parameter d4-01 determines whether the last frequency reference, before the Run command was removed, is remembered even
if the power is cycled to the Drive. If d4-01= “0: Disabled”, then when a new Run command is issued the Drive’s frequency
reference will be 0 rpm. If d4-01= “1: Enabled”, then the frequency reference will be the last commanded speed before the
Run command was removed. See figure below.
d4-02 Trim Control Level
Setting Range: 0 to 100% of Maximum Speed
Factory Default: 10% of Maximum Speed
Using digital inputs, the Drive can add or subtract a set percentage of the maximum output frequency (E1-04) to or from the frequency
referenced by the analog input. Parameter d4-02 sets the percentage that will be used to trim the frequency reference. Once the applicable
digital input that is configured as either the Trim Control Increase (H1-0x= 1C) or Trim Control Decrease (H1-0x= 1D) is re-opened, the
speed will go back to the speed determined by the analog reference.
Fig. 34 Trim Control Effect on frequency reference
Setting Description
0 Disabled (factory default)
1 Enabled
Drive
Output
Speed
+d4-02 Trim Control Increase
- d4-02 Trim Control Decrease
Speed Command +d4-02
Speed Command-d4-02 frequency reference - d4-02
- d4-02
+ d4-02
+ d4-02