Hitachi X200 Series instruction manual Unattended Start Protection

4−20

Unattended Start Protection

Operations and Monitoring

If the Run command is already set when power is turned ON, the inverter starts running immediately after powerup. The Unattended Start Protection (USP) function prevents that automatic startup, so that the inverter will not run without outside intervention. When USP is active and you need to reset an alarm and resume running, either turn the Run command OFF, or perform a reset operation by the terminal [RS] input or the keypad Stop/reset key.

In the figure below, the [USP] feature is enabled. When the inverter power turns ON, the motor does not start, even though the Run command is already active. Instead, it enters the USP trip state, and displays E13 error code. This requires outside intervention to reset the alarm by turning OFF the Run command per this example (or applying a reset). Then the Run command can turn ON again and start the inverter output.

	Run command [FW,RV]		1
			0
	[USP] terminal		1
			0
	Alarm output terminal		1
			0
	Inverter output frequency		0
	Inverter power supply		1
			0				t
		Events:		E13	Alarm	Run
					cleared	command
Option	Terminal	Function Name		State		Description
Code	Symbol

13	USP	Unattended Start	ON	On powerup, the inverter will not resume a Run
		Protection		command (mostly used in the US)
			OFF	On powerup, the inverter will resume a Run
				command that was active before power loss

Valid for inputs:	C001~C005
Required settings	(none)
Notes:

•Note that when a USP error occurs and it is canceled by a reset from a [RS] terminal input, the inverter restarts running immediately.

•Even when the trip state is canceled by turning the terminal [RS] ON and OFF after an under voltage protection E09 occurs, the USP function will be performed.

•When the running command is active immediately after the power is turned ON, a USP error will occur. When this function is used, wait for at least three (3) seconds after the powerup to generate a Run command.

Example (default input configuration shown for –FU models; –FE and –FR models require input configuration—see page 3–49):

	USP
5	4	3	2	1	L	PCS	P24

See I/O specs on page 4–6.