Omron SYSDRIVE 3G3EV SERIES, User Manual

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4-22
n39
Frequency Reference Gain
Setting range 0.10 to 2.55
(times) Factory setting 1.00 (times)
Unit of setting 0.01 (times)
n40
Frequency Reference Bias
Setting range –99 to 99 (%) Factory setting 0 (%)
Unit of setting 1 (%)
•
These constants are used to set the relationship between analog voltage and refer-
ence frequencies when frequency references are input through control terminals FR
and FC.
•
Frequency reference gain (n39): Specify the input voltage corresponding to the maxi-
mum frequency (n24) as a multiple of 10 V.
•
Frequency reference bias (n40): Specify the reference frequency corresponding to in-
put voltage 0 V as a percentage of the maximum frequency (n24).
Explanation of Frequency Reference Gain and Bias
Reference frequency
Maximum frequency
Bias setting
Gain setting = 10 V x (n39 setting)
Bias setting = Maximum frequency x (n40 setting)/100
Gain setting
Input voltage
Example of Setting:
Operating the Inverter so that the Maximum Frequency is Reached when
the Voltage Increases from 0 to 5 V
Reference frequency
Maximum frequency
Settings:
n39 = 0.50 (times)
n40 = 0 (%)
Input voltage
Preparing for Operation
Chapter 4