Hitachi SJ700-2 instruction manual Frequency operation function, +fO2 + fO2

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

Chapter 4 Explanation of Functions

(Example 1) When the motor operation is not reversible

FW

AT

Main frequency command via the OI or O terminal

0

(Example 1) When the motor operation is reversible

		FW
		AT
fOI	fO	Main frequency	fOI	fO
		command via the OI
		or O terminal

0

		fO2
Auxiliary		Auxiliary
frequency	0	frequency	0
command via		command via
the O2 terminal		the O2 terminal

fO + fO2		fOI	+fO2	fO	+ fO2
Actual frequency	Forward		Actual frequency			Forward
command	operation		command			operation
0					0	Reverse
						operation

fO2

fOI +fO2

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)
Operation-target frequency	A141/A142	02	Input via the O terminal
		03	Input via the OI terminal
selection 1 and 2
		04	Input via the RS485 terminal
		05	Input from option board 1
		06	Input from option board 2
		07	Input of pulse train
Operator selection for	A143	00	Addition: (A141) + (A142)
		01	Subtraction: (A141) - (A142)
frequency operation
		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.

4 - 13