Hitachi manual Outline of SJ-FB, Function

Chapter 2 OUTLINE OF SJ-FB

This manual describes the option board SJ-FBfor the SJ300 series inverter.

This SJ-FB board, installed in an SJ300 inverter, detects the rotation speed of a motor by accepting pulses from a shaft-mounted motor encoder, achieving highly accurate speed regulation.

This SJ-FB board can also be used to control motor stop position by inputting 90 degree out-of-phase (quadrature) pulses, as well as for synchronized operation between multiple inverters (master/slave or electronic gear), orientation function, and external torque limit input

						Inverter main body
LAC				Inside
						TH
				setting
	Position	LAD	Speed	Torque	Current	PWM	M
	control		control	limiter	control
PCLR
POK				Turn		SJ-FB
				several	Position		EC
ORT	Orientation			detection
					detection	EAP,EAN
	control					EBP,EBN
						EZP,EZN
						EP5,EG5
STAT		Speed deviation	Zero speed			AP,AN
		excessive signal	detection			BP,BN
						SAP,SAN
						SBP,SBN
		DSE	ZS
function.

Figure 2-1

Function Block Diagram

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