YASKAWA F7 Programming Manual page 83

RUN Command
Baseblock Input
Speed Command
Output Frequency
Function: Acceleration/Deceleration Ramp Hold
Setting: A
The Acc/Dec Ramp Hold function will clamp ("hold") the speed of the output frequency whenever a digital input that has been
programmed for it (H1-0x= A) is closed. All acceleration or deceleration will stop and the Drive will hold the current speed.
Once the input is opened, acceleration or deceleration continues.
The Acc/Dec Ramp Hold function is affected by parameter d4-01. If d4-01= "1: Enabled" and the Acc/Dec Ramp Hold
functions are both being used, whenever the Ramp Hold input is closed the output frequency is memorized. When interrupted
power is returned and a Run command is input, the frequency reference will be the last output frequency memorized by the
Acc/Dec Ramp Hold function, if the Acc/Dec Ramp Hold input is still closed.
Input
Hold Input
Output
Frequency
Function: Terminal A2 Enable
Setting: C
Any digital input configured as Term A2 Enable (H1-0x= C) when open will cause the input to analog input A2 to be ignored.
If analog input A2 is configured as the Main Reference (H3-13= "1: Main Fref TA1"), then the Term A2 Enable input will have no effect.
Fig. 46 External Baseblock Characteristics
Power
Run
Command
Fig. 47 Accel/Dec Ramp Hold Function Timing Diagram
Programming 75
Begin Speed Search
from stored Speed
Command
TIME
ON
OFF
ON
OFF
ON
OFF
d4-01=1
d4-01=0
TIME