Elmo HARSFEN0602, HARmonica software manual 185, Enable switch

If the motor is off, and RM=1, the Harmonica shall try to set MO=1. No restart

HARSFEN0602ElmoHARmonicaSoftwareManual PRELIMINARYDRAFT

The position command and feedback limits are illustrated in the figure below. The amplifier normally operates in the area marked "Within command and feedback limits". It may, however, visit instantaneously the areas marked "Overshoot area" due to an overshoot, and this is Ok. If the position feedback reaches the "Abort area", that amplifier will issue an out- of-position-range exception and automatically shutdown.

185

	LL[3]
Abort	Position within feedback lim its, out of
	com m and lim its
Area

VL[3]

Over- shoot

Area	W ithin position com m and and
	feedback lim its

0

Figure 37: Position command and feedback limits

HL[3]

Abort

Area

VH[3]

Over- shoot Area

!Remember that when the amplifier shuts down by exception, the motor will continue to run by its own inertia unless brakes are used (refer the section Connecting an external brake).

In order to avoid spurious motor shut downs, always:

-Specify the largest ER[3] you can tolerate

-Leave enough space between VH[3] and HL[3], to allow positioning overshoots

-Leave enough space between VL[3] and LL[3], to allow positioning overshoots.

!If you want the motor to run infinitely in the current or in the speed (UM=1 or UM=2) modes, either set XM to nonzero value, or set LL[3]<-230and HL[3]>230.

14.4Enable switch

You may program one of the digital inputs as an "Inhibit" or "Inhibit with Automatic Restart".

Digital input programming is detailed in the Command Reference Manual, the IL command. When an Inhibit input is active:

If the motor is off, MO=1 will not start the motor

•If the motor is on, MO=0 is set immediately. If the motor is rotating with high

speed, the inhibit function may be unsafe, as the motor continues to run uncontrolled by its own inertia.

When an Inhibit input is inactive:

If the motor is off, MO=1 will start the motor

When•an Inhibit input with automatic restart is active, it acts similar to Inhibit. When an Inhibit input with automatic restart is inactive: