MD280/MD280N User Manual             Parameter Description          
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auxiliary frequency source. F0-16 is used to determine the relative object of 
that range. If it is relative to maximum frequency X, that range will vary with 
the main frequency X.   
 
Frequency source 
selection
 
Factory 
default value
 
0 
0 
Main  frequency source X 
1 
Main  frequency source X plus auxiliary 
frequency source Y
 
2 
Switching between main  frequency 
source X and  auxiliary frequency 
source Y
 
3 
Switching between main  frequency 
source X and    (main frequency source X 
plus auxiliary frequency source Y)
 
F0-18 
Setup 
Range
 
4 
Switching between main  frequency 
source Y and    (main frequency source X 
plus auxiliary frequency source Y)
 
This parameter is used to select the frequency reference channel. 
Frequency reference is realized through combination of main frequency 
source X and auxiliary frequency source Y. 
 
When 1 is selected, the frequency source “main frequency source X plus 
auxiliary frequency source Y” can realize frequency overlapping function.   
When 2 is selected, it can switch between the main frequency source X 
and auxiliary frequency source Y via the multifunctional input terminal 
“Frequency Source Switching”.     
When 3 is selected, it can switch between the main frequency source X 
and (main frequency source X plus auxiliary frequency source Y) via the 
multifunctional input terminal “Frequency Source Switching”.   
When 4 is selected, it can switch between the auxiliary frequency source Y 
and (main frequency source X plus auxiliary frequency source Y) via the 
multifunctional input terminal 
“Frequency Source Switching”.   
In this way, it can realize mutually switching between the frequency 
reference modes, such as switching between PID running and common 
running, switching between simple PLC and common running, switching 
between pulse setup and analog setup, and switching between analog 
setup and common running.   
 
 
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