Mitsubishi Electric MELSERVO-J2-Super Series Supplementary Instructions Manual page 47

2. MR-J2S- A4 SERVO AMPLIFIER
(3) Power-on sequence
(a) Power-on procedure
1) Always wire the power supply as shown in above section 2.5.2(1) using the magnetic contactor
with the main circuit power supply (three-phase 400V: L
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 turned on in the servo-on state, a warning is shown at the display. However, after the main
circuit is turned on, the warning disappears and the servo amplifier will operate properly.
3) The servo amplifier can accept the servo-on (SON) about 1 to 2s after the main circuit power
supply is switched on. Therefore, when SON is switched on simultaneously with the main circuit
power supply, the base circuit will switch on in about 1 to 2s, and the ready (RD) will switch on
in further about 20ms, making the servo amplifier ready to operate. (Refer to paragraph (b) in
this section.)
4) When the reset (RES) is switched on, the base circuit is shut off and the servo motor shaft
coasts.
(b) Timing chart
Main circuit
Control circuit
Power supply
Base circuit
Servo-on
(SON)
Reset
(RES)
Ready
(RD)
Servo-on (SON) accepted
(1 to 2s)
ON
OFF
ON
OFF
ON
OFF
ON
OFF
20ms
ON
OFF
1
, L simultaneously with the main circuit power
11 21
10ms
60ms
10ms 20ms
Power-on timing chart
2 - 24
, L , L ). Configure up an external
2 3
60ms
10ms
10ms 20ms 10ms