Hitachi SJ700D-004L Instruction Manual page 84

Chapter 4
(Example 1) When the
motor operation is not
reversible
FW
AT
Main frequency
command via the OI or
O terminal
0
Auxiliary
frequency
0
command via
the O2 terminal
f + f
O O2
Actual frequency
Forward
operation
command
0
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.
(Example 1) When the
motor operation is
reversible
f
f O
Main frequency
OI
command via the OI or
O terminal
f
O2
Auxiliary
frequency
command via
the O2 terminal
f +f
OI O2
Actual frequency
command
Function code Data
00
(01)
02
03
A141/A142
04
05
06
07
00
A143 01
02
A001 10
A076 10
4-13
Explanation of Functions
FW
AT
0
0
f + f
O O2
Forward
operation
0
Reverse
operation
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
Description
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
f
OI
f
O
f
O2
f +f
OI O2