Mitsubishi Electronics FR-S500 After opening terminals RES-SD about 1s, operation is enabled

How to use the input signals (assigned terminals

RL, RM, RH, STR)

1.5.8Reset signal: Pr. 60 to Pr. 63 setting "10"

Used to reset the alarm stop state established when the inverter's protective function is activated. The reset signal immediately sets the control circuit to the initial (cold) status, e.g. initializes the electronic thermal relay function protection circuit. It shuts off the inverter output at the same time. During reset, the inverter output is kept shut off. To give this reset input, short terminals RES-SD for more than 0.1s. When the shorting time is long, the operation panel or parameter unit displays the initial screen, which is not a fault.

After opening terminals RES-SD (about 1s), operation is enabled.

The reset terminal is used to reset the inverter alarm stop state. If the reset terminal is shorted, then opened while the inverter is running, the motor may be restarted during coasting (refer to the timing chart below) and the output may be shut off due to overcurrent or overvoltage.

Setting either "1" or "15" in reset selection Pr. 75 allows the accidental input of the reset signal during operation to be ignored.

(For details, refer to page 105.)

		When motor is restarted
		during coasting, inverter
		activates current limit to	Coasting to stop
frequency		start acceleration.	(Indicates motor speed)
			Ordinary
			acceleration
		Coasting
Output
	(Hz)		Coasting time
		ON	ON

Across RES -SD ON
Across
STF (STR)-SD	T

T: Should be longer than the time of coasting to stop.

CAUTION

Frequent resetting will make electronic thermal relay function invalid.

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