Mitsubishi Electronics FR-S500 instruction manual Three-wire type connection STF, STR, STOP

Input terminals

(2) Three-wire type connection (STF, STR, STOP)
A three-wire type connection is shown on				NFB
the right. Assign the start self-holding
	Power						R, S, T
signal (STOP) to any of the input terminals.
	supply				Forward
							Inverter
To make a reverse rotation start, set Pr. 63		Stop			rotation start
to "- - -" (factory setting).
							STF
1) Short the signals STOP-SD to enable
the start self-holding function. In this							STR (Pr.63= "- - -" )
					Reverse
case, the forward/reverse rotation signal
functions only as a start signal.					rotation start		STOP
(Note) Assign the stop signal to any of							SD
Pr. 60 to Pr. 62 (input terminal
		frequency
function selection).
2) If the start signal terminals STF (STR)-
SD are shorted once, then opened, the
start signal is kept on and starts the
inverter. To change the rotation direction,									Time
short the start signals STR (STF)-SD		Output				ON
once, then open it.	Start
3) The inverter is decelerated to a stop by
								ON
opening the signals STOP-SD once. For
the frequency setting signal and the	Stop
operation of DC injection brake at a stop			3-wire type connection example
time, refer to paragraphs 2) to 4) in (1)

Two-wire type connection. The right diagram shows 3-wire type connection.

4)When the signals JOG-SD are shorted, the STOP signal is invalid and the JOG signal has precedence.

5)If the output stop signals MRS-SD are shorted, the self-holding function is not deactivated.

DC Injection Brake and Coasting to Stop Functionality

Operation	External Operation or Combined		PU Operation or Combined
	Operation		Operation
Mode	Pr. 79 = "0", "2", "3"		Pr. 79 = "0", "1", "4"
	Terminals STF	Set frequency		Set frequency
	(STR)-SD		Stop key
DC	disconnected	changed to 0Hz		changed to 0Hz
Brake	(*1)
	DC injection brake		DC injection brake
	operated at not	DC injection brake	operated at not	DC injection brake
DC injection	more than "DC		more than "DC
	injection brake	operated at 0.5Hz	injection brake	operated at 0.5Hz
brake enabled
	operation	or less.	operation	or less.
	frequency" set in		frequency" set in
	Pr. 10		Pr. 10
	Coasted to a stop		Coasted to a stop
DC injection	at not more than	Coasted to a stop	at not more than	Coasted to a stop
	"DC injection		"DC injection
brake disabled	brake operation	at 0.5Hz or less.	brake operation	at 0.5Hz or less.
	frequency" set in		frequency" set in
	Pr. 10		Pr. 10
*1: Also stopped by the RESETSTOP		. Refer to page 105.
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