Hitachi SJ300 Series SRW Display, “B” Function, B090: Dynamic braking usage ratio –

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“B” Group: Fine-Tuning Functions

		“B” Function			Run		Defaults
					Mode				Units	SRW Display
	Func.				Edit	–FE	–FU	–FR
		Name		Description
	Code				Lo Hi	(EU)	(US)	(JP)
	B090	Dynamic braking usage	Selects the braking duty		✘ ✔	00	00	00	—	>b090 BRD
		ratio	cycle for the dynamic							%ED	000.0%
			braking resistor (total brake
			% ON-time per 100 sec.
			interval).
			Range is 0.0 to 100.0%
			0%Dynamic braking
				disabled
			>0% Enabled, per value
	B091	Stop mode selection	Selects how the inverter		✘ ✘	00	00	00	—	>b091 RUN
			stops the motor, two option							STOP	DEC
			codes:
			00	DEC (decelerate and
ConfiguringDrive Parameters				stop)
			01	FRS (free run to stop)
	B092	Cooling fan control	Two option codes:		✘ ✘	00	00	00	—	>b092 INITIAL
		(see note below)	00	Fan always ON						FAN-CTL	OFF
			01	Fan ON during RUN,
				OFF during STOP
	B095	Dynamic braking	Three option codes:		✘ ✔	00	00	00	—	>b095 BRD
		control	00	Disable						Mode	OFF
			01	Enable during RUN only
			02	Enable always
	B096	Dynamic braking	Range is:		✘ ✔	360/	360/	360/	V	>b096 BRD
		activation level	330 to 380V (200V class),			720	720	720		LEVEL	360Vdc
			660 to 760V (400V class)
	B098	Thermistor for thermal	Three option codes:		✘ ✔	00	00	00	—	>b098 THERM
		protection control	00	Disable						SELECT	OFF
			01	Enable-PTC thermistor
			02	Enable-NTC thermistor
	B099	Thermal protection	Thermistor resistance		✘ ✔	3000	3000	3000	Ohms	>b099 THERM
		level setting	threshold at which trip							LEVEL	3000ohm
			occurs.
			Range is 0.0 to 9999 Ohms

B090: Dynamic braking usage ratio – This parameter limits the amount of time the inverter can use the dynamic braking accessory device without entering the Trip Mode. Please refer to “Dynamic Braking” on page 5–6 for more information on dynamic braking accessories.

NOTE: When cooling fan control is enabled (B092=01) the inverter always turns the fan ON for 5 minutes immediately after powerup. This will cool the inverter in case the inverter / motor is still warm from prior running before a short power outage.