YASKAWA Varispeed f7, Programming Manual

Page: 83 / 202

Programming 75
Fig. 46 External Baseblock Characteristics
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.
Fig. 47 Accel/Dec Ramp Hold Function Timing Diagram
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.
RUN Command
Baseblock Input
Speed Command
Output Frequency
Begin Speed Search
from stored Speed
Command
TIME
Run
Command
Hold Input
Output
Frequency
Input
Power
d4-01=1
d4-01=0
ON
ON
ON
OFF
OFF
OFF
TIME