Upper And Lower Frequency Reference Limits; Adjusting The Analog Input - Omron VS mini J7 User Manual

Setting the Frequency Reference
5-5-2

Upper and Lower Frequency Reference Limits

Setting the Frequency Reference Upper and Lower Limits (n30 and n31)
n30
Setting 0% to 110%
range (Max. frequency = 100%)
n31
Setting 0% to 110%
range (Max. frequency = 100%)
5-5-3

Adjusting the Analog Input

FR Terminal Adjustments for Frequency Reference Input
Gain and Bias Settings
(n41 and n42)
n41
Setting 0% to 255%
range (Max. frequency = 100%)
n42
Setting -99% to 99%
range (Max. frequency = 100%)
n43 Analog Frequency Reference Filter Time
Setting 0.00 to 2.00 (s)
range
56
Regardless of the methods of operation mode and frequency reference input,
the upper and lower frequency reference limits can be set.
• Set the upper and lower frequency reference limits as percentage based
on the maximum frequency as 100%.
Frequency Reference Upper Limit
Unit of
setting
Frequency Reference Lower Limit
Unit of
setting
Note If n31 is set to a value less than the minimum output frequency (FMIN), the
Inverter will have no output when a frequency reference less than the
minimum output frequency input is ON.
Input characteristic adjustments may be necessary for analog frequency
references to be input. At that time, use the following parameters for gain,
bias, and filter time parameter adjustments.
• Set the input characteristics of analog frequency references in n41 (for
the frequency reference gain) and n42 (for the frequency reference bias).
• Set the frequency of maximum analog input (10 V or 20 mA) in n41 as
percentage based on the maximum frequency as 100%.
• Set the frequency of minimum analog input (0 V, 0 mA, or 4 mA) in n42 as
percentage based on the maximum frequency as 100%.
Frequency Reference Gain
Unit of
setting
Frequency Reference Bias
Unit of
setting
• Analog Frequency Reference Filter Time (n43)
• The digital filter with a first-order lag can be set for analog frequency
references to be input.
• This setting is ideal if the analog input signal changes rapidly or the
signal is subject to noise interference.
• The larger the set value is, the slower the response speed will be.
Unit of
setting
Changes during
operation
1% Default setting
Changes during
operation
1% Default setting
Changes during
operation
1% Default setting
Changes during
operation
1% Default setting
Changes during
operation
0.01 s Default setting
Chapter 5-5
No
100
No
0
Yes
100
Yes
0
No
0.10