Mitsubishi Electric MELSERVO MR-HP30KA, Instruction Manual

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3. SIGNALS AND WIRING
3.3.4 Power-on sequence
1) Always wire the power supply as shown in above Section 3.3.1 using the magnetic contactor with the
main circuit power supply. Configure up an external sequence to switch off the magnetic contactor as
soon as an alarm occurs.
2) Switch on the control circuit power supply L
11
, L
21
simultaneously with the main circuit power supply
or before switching on the main circuit power supply. If the main circuit power supply is not on, the
display shows the corresponding warning. However, by switching on the main circuit power supply, the
warning disappears and the servo amplifier will operate properly.
3) The servo amplifier can accept the servo-on signal (SON) about 1 second after the main circuit power
supply is switched on. Therefore, when SON is switched on simultaneously with the three-phase power
supply, the base circuit will switch on in about 1 second, and the ready signal (RD) will switch on in
further about 20ms, making the servo amplifier ready to operate.
CAUTION
To stop operation and switch power off immediately, provide an external emergency
stop circuit.
Make up a circuit which shuts off main circuit power as soon as EMG-SG are opened at an emergency
stop. Opening EMG-SG coasts the servo motor. When the optional dynamic brake is used, the servo motor
comes to a sudden stop. At this time, the display shows the servo emergency stop warning (AL.E6).
During ordinary operation, do not use the external emergency stop signal to alternate stop and run. If the
start signal is on or a pulse train is input during an emergency stop, the servo motor will rotate as soon as
the warning is reset. During an emergency stop, always shut off the run command. (For next figure is the
case of MR-J2S-A.)
VDD
COM
EMG
SG
Servo amplifier
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