Hitachi SJ700-2 - Manual (Page 76)

Chapter 4 Explanation of Functions
(Example 1
4 - 1
3
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 Function code Data Description
00 Digital operator (A020/A220/A320)
(01)
Control on the digital operator
(Valid only when the OPE-SR is connected)
02 Input via the O terminal
03 Input via the OI terminal
04 Input via the RS485 terminal
05 Input from option board 1
06 Input from option board 2
Operation-target frequency
selection 1 and 2
A141/A142
07 Input of pulse train
00 Addition: (A141) + (A142)
01 Subtraction: (A141) - (A142)
Operator selection for
frequency operation
A143
02 Multiplication: (A141) x (A142)
Frequency source setting A001 10 Output of operation result
PV source setting A076 10 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.
f O
f O2
f OI +f O2
0
AT
f OI
0
0
f O + f O2
FW FW
AT
f OI
0
0
0
f O
f O2
f O + f O2 f OI +f O2
) When
peration
eversible
y
erminal
iliary
y
rminal
y Forward
operation
Forward
operation
Reverse
operation
(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
command
the motor o
is not r
Main frequenc
command via the OI
or O t
Aux
frequenc
command via
the O2 te
Actual frequenc
command
A141: Operation-target frequency selection 1
A142: Operation-target frequency selection 2
A143: Operator selection
A001: Frequency source setting
A076: PV source setting
Related code