Power-On Sequence - Mitsubishi Electric MELSERVO-J2 Series Instruction Manual

3. SIGNALS AND WIRING

3.7.3 Power-on sequence

(1) Power-on procedure
1) Always wire the power supply as shown in above Section 3.7.1 using the magnetic contactor with
the main circuit power supply (three-phase 200V: L
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
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 (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 (RD) will switch on in
further about 20ms, making the servo amplifier ready to operate. (Refer to paragraph (2) in this
section.)
4) When the reset (RES) is switched on, the base circuit is shut off and the servo motor shaft coasts.
(2) Timing chart
Main circuit
Power supply
control circuit
Base circuit
Servo-on
(SON)
Reset
(RES)
Ready
(RD)
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SON accepted
(1s)
ON
OFF
ON
OFF
ON
OFF
ON
OFF
20ms
ON
OFF
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, L , L , single-phase 230V: L
1 2 3
, L simultaneously with the main circuit power
11 21
10ms 10ms
60ms
10ms 20ms
3 - 23
, L ). Configure
1 2
60ms
10ms 20ms 10ms