Power-On Sequence - Mitsubishi Electric Melservo MR-J3-A Instruction Manual

3. SIGNALS AND WIRING

3.3.2 Power-on sequence

(1) Power-on procedure
1) Always wire the power supply as shown in above section 3.1 using the magnetic contactor with the main
circuit power supply (three-phase: L
switch off the magnetic contactor as soon as an alarm occurs.
2) Switch on the control circuit power supply L
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 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 5ms,
making the servo amplifier ready to operate. (Refer to paragraph (2) of 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
Control circuit
Power supply
Base circuit
Servo-on
(SON)
Reset
(RES)
Ready
(RD)
, L
1 2
Servo-on (SON) accepted
(1.5 to 2s)
ON
OFF
ON
OFF
ON
OFF
ON
OFF
5ms
ON
OFF
, L , single-phase: L , L
3 1
, L simultaneously with the main circuit power supply or
11 21
10ms
95ms
10ms 5ms
Power-on timing chart
3 - 15
). Configure up an external sequence to
2
10ms 95ms
10ms 5ms 10ms