Frequency Operation Function (A141 To A143, A001, A076) - Hitachi L700 SERIES Instruction Manual

(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
Actual frequency
Forward
operation
command
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).
Item
Operation-target frequency
selection 1 and 2
Operator selection for
frequency operation
Frequency source setting
PV source setting
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.
Function code Data
00
(01)
02
03
A141/A142
04
05
06
07
00
A143 01
02
A001 10
A076 10
4 - 13
Chapter 4 Explanation of Functions
(Example 1) When
the motor operation
is reversible
Main frequency
command via the OI
or O terminal
Auxiliary
frequency
command via
the O2 terminal
Actual frequency
Forward
operation
command
Related code
A141: Operation-target frequency selection 1
A142: Operation-target frequency selection 2
A143: Operator selection
A001: Frequency source setting
A076: PV source setting
Digital operator (A020/A220/A320)
Control on the digital operator
(Valid only when the OPE-SR is connected)
Input via the O terminal
Input via the OI terminal
Input via the RS485 terminal
Input from option board 1
Input from option board 2
Input of pulse train
Addition: (A141) + (A142)
Subtraction: (A141) - (A142)
Multiplication: (A141) x (A142)
Output of operation result
Output of operation result
Reverse
operation
Description