Stopping Acceleration And Deceleration (Acceleration/Deceleration Ramp Hold) - YASKAWA G7 Series Technical Manual

Stopping Acceleration and Deceleration (Acceleration/Deceleration
Ramp Hold)
The acceleration/deceleration ramp hold function stops acceleration and deceleration, stores the output fre-
quency at that point in time, and then continues operation.
Set one of the parameters H1-01 to H1-10 (multi-function contact input terminal S3 to S12 function selection)
to A (acceleration/deceleration ramp hold) to stop acceleration and deceleration when the terminal is turned
ON and to store the output frequency at that point in time. Acceleration and deceleration will restart when the
terminal is turned OFF.
If d4-01 is set to 1 and the Acceleration/Deceleration Ramp Hold command is input, the output frequency is
still stored even after the power supply is turned OFF.
Related Parameters
Name
Parameter
Number
Display
Frequency This parameter is used to retain
Reference Hold the held frequency reference in
Function U1-01 (d1-01) when power is
Selection removed. This function is
available when the multi-function
d4-01 inputs "accel/decel ramp hold" or
"up/down" commands are
MOP Ref
selected (H1-XX = A or 10 and
Memory
11).
0: Disabled
1: Enabled
Time Chart
The time chart when using Acceleration/Deceleration Ramp Hold commands is given below.
Power supply
Forward/Stop
Acceleration/Deceleration
Ramp Hold
Frequency reference
Output frequency
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Setting
Description
Range
0 to 1
Hold Hold
Fig 6.49 Acceleration/Deceleration Ramp Hold
Input Terminal Functions
Control Methods
Change
Open
Factory
V/f
during
Loop
Setting
V/f with
Operation
Vector
PG
0 No A A
Open
Flux Loop
Vector Vector
1 2
A A A
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