Hitachi SJ700-2 instruction manual Reset RS function

Related code

b003: Retry wait time before motor restart

b007: Restart frequency threshold

C102: Reset mode selection

C103: Restart mode after reset

C001 to C008: Terminal [1] to [8] functions

Chapter 4 Explanation of Functions

Timing chart for switching from the inverter to the

commercial power supply

Timing chart for switching from the commercial power

supply to the inverter

MC1 ON

MC2 ON

MC3 ON

FW ON

CS ON

Inverter output

frequency Operation

MC1

MC2

MC3

FW

CS

Inverter output frequency

ON

Duration of the interlock of MC2 and

MC3 (0.5 to 1 second)

ON

ON OFF

Retry wait time (b003) 0.5 to 1 second

Operation

4.2.49 Reset (RS) function

Starting with matching frequency

The reset function allows you to recover the inverter from a tripped state.

To perform resetting, press the STOP/RESET key of the digital operator or turn the RS terminal off.

To use the control circuit terminal for resetting, assign function "18" (RS) to an intelligent input terminal.

You can select the restart mode to apply after resetting with the restart mode after reset (C103). When C102 =03, starting with 0 Hz is selected regardless to C103 setting.

If the inverter trips because of overcurrent when it starts the motor with matching frequency, increase the retry wait time before motor restart (b003).

You can select the alarm reset timing with the reset mode selection (C102). You can also enable the reset signal to be output only when resetting an error alarm.

The RS terminal can be configured only as an a-contact (NO).

Do not use the RS terminal for the purpose of shutting off the inverter output. The reset operation clears the electronic thermal and BRD counter data stored in the inverter, and, without this data, the inverter may be damaged during operation.

Item	Function	Data or range of	Description
	code	data
Retry wait time			(See the explanations of the retry after instantaneous power
	b003	0.3 to 100. (s)	failure or the retry after trip due to insufficient voltage.)
before motor restart
			Time to wait after reset until restarting the motor
Restart frequency	b007	0.00 to 400.0 (Hz)	(See the explanations of the retry after instantaneous power
threshold			failure or the retry after trip due to insufficient voltage.)
			Resetting the trip when the RS signal is turned on (See
		00	example 1.)
			(When operation is normal) Shutting off the inverter output
			(When an error has occurred) Resetting the trip
			Resetting the trip when the RS signal is turned off (See
		01	example 2.)
			(When operation is normal) Shutting off the inverter output
Reset mode
	C102		(When an error has occurred) Resetting the trip
selection			Resetting the trip when the RS signal is turned on (See
		02	example 1.)
			(When operation is normal) Disabling the inverter output
			(When an error has occurred) Resetting the trip
			Trip is reset (See example 1)
		03	Internal data is not reset. (see 4.3.13)
			(When operation is normal) Disabling the inverter output
			(When an error has occurred) Resetting the trip
Restart mode after	C103	00	Start with 0 Hz
		01	Start with matching frequency (See example 3.)
reset
		02	Restart with input frequency (See example 4.)

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