Hitachi SJ700-2 instruction manual SW1

Chapter 2 Installation and Wiring

About the emergency stop function (disabled by the factory setting)

-The emergency stop function shuts off the inverter output (i.e. stops the switching operation of the main circuit elements) in response to a command from a hardware circuit via an intelligent input terminal

without the operation by internal CPU software.

Note: The emergency stop function does not electrically shut off the inverter but merely stops the switching operation of the main circuit elements. Therefore, do not touch any terminals of the inverter or any power lines, e.g., motor cables. Otherwise, electric shock, injury, or ground fault may result.

-When the emergency stop function is enabled, intelligent input terminals 1 and 3 are used exclusively for this function, and no other functions can be assigned to these terminals. Even if other functions have been assigned to these terminals, these are automatically disabled and these terminals are used exclusively for the emergency stop function.

Terminal [1] function:

This terminal always serves as the a (NO) contact for the reset (RS) signal.

This signal resets the inverter and releases the inverter from the trip due to emergency stop (E37.*). Terminal [3] function:

This terminal always serves as the b (NC) contact for the emergency stop (EMR) signal. This signal shuts off the inverter output without the operation by internal CPU software.

This signal makes the inverter trip due to emergency stop (E37.*).

Note: If intelligent input terminal 3 is left unconnected, the cable connected to the terminal is disconnected, or the signal logic is improper, the inverter trips due to emergency stop (E37.*). If this occurs, check and correct the wiring and signal logic, and then input the reset (RS) signal.

Only the reset (RS) signal input from intelligent input terminal [1] can release the inverter from tripping due to emergency stop (E37.*). (The inverter cannot be released from the E37.* status by any operation from the digital operator.)

- To enable the emergency stop function, set the slide lever of slide switch SW1 to ON. (With the factory setting, slide switch SW1 is set to OFF to disable the function.)

Note: Before operating slide switch SW1, make sure that the input power supply is off.

Setting of slide switch SW1 setting and function selection for intelligent input terminals [1] and [3]

Setting of slide switch		Intelligent input terminal [1]				Intelligent input terminal [3]
			a/b (NO/NC) selection				a/b (NO/NC) selection
SW1	Terminal [1] function [C001]				Terminal [3] function [C003]
			[C011] (*1)				[C013] (*1) (*2)
SW1 is OFF.	Selectable arbitrarily (*4)		Selectable arbitrarily (*4)		Selectable arbitrarily (*4)		Selectable arbitrarily (*4)
Emergency stop	Factory		Factory		Factory		Factory
disabled		18 (RS)		00 (NO)		06 (JG)		00 (NO)
	setting		setting		setting		setting
(factory setting)
	Automatic assignment of functions to intelligent input terminals [1] and [3] and the terminal to which function "18 (RS)" has been
SW1 is ON.				assigned (*3)
Emergency stop	Fixed function		Fixed function		Fixed function		Fixed function
enabled (*5)	(cannot be	18 (RS)	(cannot be	00 (NO)	(cannot be	64 (EMR)	(cannot be	01 (NC)
	changed)		changed)		changed)		changed)
SW1 is ON (after	Selectable arbitrarily (*4)		Selectable arbitrarily (*4)		Selectable arbitrarily (*4)		Selectable arbitrarily (*4)
setting to OFF once).	Setting made		Setting made		Released	no	Setting made
	when SW1 is		when SW1 is		from		when SW1 is
Emergency stop		18 (RS)		00 (NO)		(No function		01 (NC)
	set ON		set ON		emergency		set ON
disabled (*3) (*5)						assigned)
	retained		retained		stop function		retained

*1 When function "18 (RS)" is assigned to the input terminal, "a/b (NO/NC)" selection is always "00 (NO)".

*2 When terminal setting "C003" is "64 (EMR)", terminal setting "C013" is always "01 (NC)".

*3 If function "18 (RS)" has been assigned to an intelligent input terminal other than intelligent input terminals [1] and [3] before slide switch SW1 is set to ON, the input terminal setting for said terminal is automatically changed to "no (no function assigned)" when slide switch SW1 is set to ON to prevent any duplication of terminal functions. Even if slide switch SW1 is subsequently returned to OFF, the original function setting for said terminal will not be restored. If necessary, the original function will have to be re-assigned to said terminal.

Example: If slide switch SW1 is set to ON when function "18 (RS)" has been assigned to input terminal 2 (by terminal setting "C002"), terminal setting "C002" is changed to "no (no function assigned)," and function "18 (RS)" is assigned to input terminal 1 (by terminal setting "C001").

Even if slide switch SW1 is subsequently returned to OFF, terminal [2] function "C002" and terminal [1] function "C001" will remain as "no (no function assigned)" and "18 (RS)," respectively.

*4 Function "64 (EMR)" cannot be assigned to input terminal 3 by an operation from the digital operator. The function is automatically assigned to the terminal when slide switch SW1 is set to ON.

*5 After slide switch SW1 has been set to ON once, function assignments to intelligent input terminals [1] and [3] are not returned to their original assignments. If necessary, re-assign original functions to the intelligent input terminals.

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