Maintenance - Mitsubishi Electric MELSERVO-J4 Series Instruction Manual

Function block diagram (STO function)
CN8
Shut-off signal (STO1)
Monitor signal (TOFB1)
Shut-off signal (STO2)
Monitor signal (TOFB2)
Operation sequence (STO function)
Servo motor speed
0 r/min
ON
EM2 (Forced stop 2)
OFF
ON
STO1 STO2
OFF
ON
Magnetic contactor
OFF
Base circuit
ON
(Supplying energy to
OFF
the servo motor)

Maintenance

This servo amplifier has alarms and warnings for maintenance compatible with Drive safety function.
Page 280 TROUBLESHOOTING
Base power
supply for
upper arm
Shut-
off
Base power
supply for
lower arm
Shut-
off
(8 ms)
Power
module
M
Servo motor
13 USING STO FUNCTION
13
455
13.1 Introduction