Mitsubishi Electronics MR-J2S- CL Gain changing function, Applications, Function block diagram

9. SPECIAL ADJUSTMENT FUNCTIONS

9.5 Gain changing function

This function can change the gains. You can change between gains during rotation and gains during stop or can use an external signal to change gains during operation.

9.5.1 Applications

This function is used when:

(1)You want to increase the gains during servo lock but decrease the gains to reduce noise during rotation.

(2)You want to increase the gains during settling to shorten the stop settling time.

(3)You want to change the gains using an external signal to ensure stability of the servo system since the load inertia moment ratio varies greatly during a stop (e.g. a large load is mounted on a carrier).

9.5.2 Function block diagram

The valid control gains PG2, VG2, VIC and GD2 of the actual loop are changed according to the conditions selected by gain changing selection CDP (parameter No. 68) and gain changing condition CDS (parameter No. 69).

CDP

Parameter No.68

External signal

CDP

Command pulse frequency

Droop pulses
						Changing
Model speed
	Comparator
CDS
Parameter No.69
				GD2
		Parameter No.34				Valid
				GD2
						GD2 value
		Parameter No.64
				PG2
		Parameter No.35				Valid
		PG2			PG2B	PG2 value
		100
				VG2
		Parameter No.37				Valid
		VG2			VG2B	VG2 value
		100
					VIC
		Parameter No.38				Valid
			VIC		VICB	VIC value
			100

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