Parameter
No.
Function name Data Default data Unit
d24 Zero Speed Control
0: Disable at startup, enable at
stop
1: Enable at startup, enable at
stop
2: Disable at startup, disable at
stop
0 -
Related function
Drive Control Selection (F42/A14), Starting Frequency (F23/
A12), Stop Frequency (F25/A63), Starting Frequency Hold-
ing T
ime (F24/A62), Stop Frequency Holding Time (F39/
A65)
• When zero speed control is enabled, it is executed when the RUN command is ON and the frequen-
cy reference is less than the starting frequency and less than the stop frequency. Note, however,
that when the starting frequency and stop frequency are 0.0 Hz, zero speed control is executed with
the speed command set to 0.00 Hz.
•
The following shows the time chart during vector control when “1: Enable at startup, enable at stop”
is set to Zero Speed Control (d24). With vector control, acceleration is performed in accordance with
the acceleration time up to the starting frequency.
Frequency Reference
Output frequency
RUN command
Starting Frequency
Holding Time (F24/A62)
Zero speed control period Zero speed control period
0Hz
Stop Frequency
Holding Time (F39/A65)
Starting Frequency
(F23/A12)
Stop Frequency
(F25/A63)
7-9-5
Frequency Jump Function
Use this function to avoid the resonant point of the load machine during operation. Three points can
be set for the jump frequency range.
Parameter No. Function name Data Default data Unit
C01/C02/C03
Jump Frequency 1/
Jump Frequency 2/
Jump Frequency 3
0.0 to 590.0
Set the center frequency of the frequen-
cy skip width to be jumped.
*1
0.0 Hz
C04
Jump Frequency Skip
Width
0.0 to 30.0
Set the skip width of the frequency to
be jumped.
3.0 Hz
*1. This function is disabled when 0 Hz is set.
If the jump frequency is set to avoid steady operation within the jump frequency range, the setting of
the frequency reference within the jump frequency range operates as described below.
7 Other Functions
7-116
M1 Series Standard Type User's Manual (I669)
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