Toshiba VF-A7 instruction manual Emergency stop, Overload reduction start-up frequency

6.25.4 Emergency stop

 ：Emergency stop

 ：Emergency DC injection braking control time

・Function

Emergency stop mode of can be selected. At emergency stop, a trip message ("") is displayed.

Note) When setting  at  or (Emergency DC injection braking stop), you need to set also the parameters (DC injection braking current) and (Emergency DC injection braking control time).

1) Emergency stop by terminal operation

Emergency stop can be performed with the a or b-contact. Assign the emergency stop function to a terminal as described below, and select a stop mode.

Input

CC

a-contact

Input

CC

b-contact

[Parameter setting]

Title	Function	Adjustment range	Default setting
		: Coast stop
		: Deceleration stop
	Emergency stop	: Emergency DC injection braking stop
		: Coast stop without FL output	
		: Deceleration stop without FL output
		: Emergency DC injection braking
		without FL output
	Emergency DC injection braking	～ [s]	
	control time
	DC injection braking current	～ [%]	

(Example of assignment) Assigning the emergency stop function to the terminal S4

Title

Function

Adjustment range

Setting value



Input terminal selection #8 (S4)

～

(emergency stop)

Note 1) An emergency stop can be carried out from the terminal even in panel operation mode. In this case, however, holding down the Stop key for more than 5 seconds causes the inverter trip () even when  is set at ,  or .

Note 2) If DC injection braking is not needed for normal stops, though  is set at  or  (emergency DC injection braking), then set the DC braking time  at  [s].

2) Emergency stop by panel operation

Emergency stop can be performed with the control panel, in other operation command mode. Press twice the STOP key on the control panel.

①Press the STOP key ―――――“” starts blinking.

② Press the STOP key again ―― Emergency stop

Then, "" is displayed, and also a fault detection signal (FL) is put out at  =,  or , while the FL is not active if  is set at 3, 4 or 5.

6.25.5 Overload reduction start-up frequency

 ：Overload reduction start-up frequency

Refer to 5.13 for details.

6.25.6 Motor's 150%-overload time limit

 ：Motor 150%-overload time limit

Refer to 5.13 for details.

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