Mitsubishi Electronics MR-J2S- A instruction manual Gain changing function, Applications

8. SPECIAL ADJUSTMENT FUNCTIONS

8.3 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.

8.3.1 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).

8.3.2 Function block diagram

The valid control gains PG2, VG2, VIC and GD2 of the actual loop are changed according to the conditions selected by parameters CDP (parameter No. 65) and CDS (parameter No. 66).

CDP

ParameterNo.65

External signal

CDP

Command pulse frequency

Droop pulses

Model speed							Changing
	Comparator
CDS
ParameterNo.66
				GD2
		ParameterNo.34					Valid
			GD2			GD2B	GD2 value
					100
				PG2
		ParameterNo.35					Valid
			PG2			PG2B	PG2 value
					100
				VG2
		ParameterNo.37					Valid
			VG2			VG2B	VG2 value
					100
					VIC
		ParameterNo.38					Valid
				VIC		VICB	VIC value
					100

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