Chapter 4 Explanation of Functions
4-13
4.2.12 Frequency operation function
The frequency operation function allows you to use the result of
an arithmetic operation on two frequency commands as the actual
frequency command or PID feedback data.
To use the operation result as the actual frequency command,
specify "10" for the frequency source setting (A001).
To use the operation result as the PID feedback data, specify "10" for the PV source setting (A076).
Operation-target frequency
selection 1 and 2
Digital operator (A020/A220/A320)
Control on the digital operator
(Valid only when the OPE-SR is connected)
Input via the OI terminal
Input via the RS485 terminal
Input from option board 1
Input from option board 2
Operator selection for frequency
operation
Addition: (A141) + (A142)
Subtraction: (A141) - (A142)
Multiplication: (A141) x (A142)
Output of operation result
Output of operation result
Note 1: The [1] (up) and [2] (down) keys of the digital operator are ineffective when the frequency operation function
is enabled. Also, the frequency displayed by the output frequency monitoring (d001), Scaled output frequency
monitoring (d007), or output frequency setting (F001) cannot be changed with key operations.
Note 2: The settings of "A141" and "A142" can be the same.
(Example 1) When the
motor operation is not
reversible
Main frequency
command via the OI or
O terminal
Auxiliary
frequency
command via
the O2 terminal
(Example 1) When the
motor operation is
reversible
Main frequency
command via the OI or
O terminal
Auxiliary
frequency
command via
the O2 terminal
A141: Operation-target frequency selection 1
A142: Operation-target frequency selection 2
A143: Operator selection
A001: Frequency source setting
A076: PV source setting
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