Mitsubishi Electronics MR-J2S- CL specifications Battery installation procedure, Operation, Point

4. OPERATION

(4)Outline of absolute position detection data communication

For normal operation, as shown below, the encoder consists of a detector designed to detect a position within one revolution and a cumulative revolution counter designed to detect the number of revolutions.

The absolute position detection system always detects the absolute position of the machine and keeps it battery-backed, independently of whether the general-purpose programming controller power is on or off. Therefore, once the home position is defined at the time of machine installation, home position return is not needed when power is switched on thereafter.

If a power failure or a fault occurs, restoration is easy.

Also, the absolute position data, which is battery-backed by the super capacitor in the encoder, can be retained within the specified period (cumulative revolution counter value retaining time) if the cable is

unplugged or broken.

Servo amplifier

Program No. selection (DI0 to DI3), etc.

	Home position return					Position control
I/O circuit	data				Speed control
	EEP-ROM memory		Current position
		LSO
		1XO
Position data, speed data	Backup at
	power off			1X
(current position read)			LS
				Detection of position
			Speed detection
	Battery	MR-BAT		within one revolution
Servo motor
1 pulse/rev. Cumulative				High-speed serial
revolution counter
Super capacitor				communication
Within one-revolution counter

(5) Battery installation procedure

Before starting battery installation procedure, make sure that the charge lamp is off WARNING more than 10 minutes after power-off. Then, confirm that the voltage is safe in the

tester or the like. Otherwise, you may get an electric shock.

POINT

The internal circuits of the servo amplifier may be damaged by static electricity. Always take the following precautions:

Ground human body and work bench.

Do not touch the conductive areas, such as connector pins and electrical parts, directly by hand.

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