Hitachi SJ700-2 instruction manual Retry or trip after instantaneous power failure

Related code

b001: Selection of restart mode

b002: Allowable under-voltage power failure time

b003: Retry wait time before motor restart

b004: Instantaneous power failure/under-voltage trip alarm enable

b005: Number of restarts on power failure/under-voltage trip events b007: Restart frequency threshold

b008: Selection of retry count after undervoltage

C021 to C025: Terminal [11] to [15] functions

C026: Alarm relay terminal function

Chapter 4 Explanation of Functions

4.2.27 Retry or trip after instantaneous power failure

(1) Retry (restart) after instantaneous power failure You can select tripping or retrying (restarting) the motor operation as the inverter operation to be performed at the occurrence of instantaneous power failure or undervoltage.

If you specify a retry operation for the selection of restart mode (b001), the inverter will retry the motor operation for the number of times set as "b005" after an instantaneous power failure or the number of times set as "b009" after overvoltage respectively, and then trip if all retries fail. (The inverter will not trip if you specify an unlimited number of retries.)

With function "b004" you can select whether to make the inverter trip when an instantaneous power failure or undervoltage occur while the inverter is in a stopped state.

When selecting a retry operation, also set the retry conditions listed below according to the system to be driven by the inverter.

Even during a retry operation, the inverter will trip with error code "E09" (undervoltage) displayed if the undervoltage status continues for 40 seconds.

Item	Function code	Data or range of	Description
		data
		00	Tripping
		01	Restarting the motor with 0 Hz at retry
		02	Starting the motor with a matching frequency at retry
Selection of restart mode			(See example 1.) (*3)
	b001
			Starting the motor with a matching frequency at retry
(*4) (*6)
		03	The inverter trips after decelerating and stopping the
			motor. (*1) (*3)
		04	Restarting the motor with an input frequency at retry
			(See example 1.) (*3)
			Restarting the motor when the power failure duration does
Allowable under-voltage	b002	0.3 to 25.0 (s)	not exceed the specified time (See example 1.)
power failure time			Tripping when the power failure duration exceeds the
			specified time (See example 2.)
Retry wait time before	b003	0.3 to 100. (s)	Time to wait until restarting the motor
motor restart
Instantaneous power		00	Disabling the inverter from tripping
		01	Enabling the inverter to trip
failure/under-voltage trip	b004		Disabling the inverter from tripping when the inverter is
alarm enable (*2) (*4)		02	stopped or while the motor is being decelerated or
			stopped after the operation command has been turned off
Number of restarts on		00	Retrying the motor operation up to 16 times after
			instantaneous power failure
power failure/under-voltage	b005
			Retrying the motor operation an unlimited number of times
trip events		01
			after instantaneous power failure
			Restarting the motor with 0 Hz if the frequency becomes
Restart frequency threshold	b007	0.00 to 400.0 (Hz)	less than the frequency set here during motor free-running
			(See examples 3 and 4.)
		00	Tripping
		01	Restarting the motor with 0 Hz at retry
Trip/retry selection	b008	02	Starting the motor with a matching frequency at retry
			Starting the motor with a matching frequency at retry
		03	The inverter trips after decelerating and stopping the
			motor.
		04	Restarting the motor with an input frequency at retry
		00	Retrying the motor operation up to 16 times after
Selection of retry count	b009		undervoltage
after undervoltage		01	Retrying the motor operation an unlimited number of times
			after undervoltage
Selection of retry count			Number of retries to be made after the occurrence of
after overvoltage or	b010	1 to 3 (times)
			overvoltage or overcurrent (*5)
overcurrent
Retry wait time after	b011	0.3 to 100. (s)	Time to wait until restarting the motor
overvoltage or overcurrent
Active frequency matching,	b030	00	Frequency set when the inverter output has been shut off
		01	Maximum frequency
restart frequency select
		02	Newly set frequency
Active frequency matching,		"0.20 x rated
	b028	current" to "2.00 x	Current limit for restarting with active matching frequency
scan start frequency
		rated current"
Active frequency matching,	b029	0.10 to 30.00 (s)	Duration of frequency lowering when restarting with active
scan-time constant			matching frequency

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