MITSUBISHI ELECTRIC MR-J2S- A - Manual (Page 97)

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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 1 , L 2 , L 3 , single-phase 230V, single-phase
100V: L 1 , L 2 ). 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 (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 (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
20ms 10ms 20ms
60ms
60ms
OFF
ON
OFF
ON
ON
OFF
OFF
ON
OFF
ON
10ms
10ms 20ms
10ms
10ms
(1 to 2s)
Servo-on (SON) accepted
Main circuit
Control circuit
Power supply
Base circuit
Servo-on
(SON)
Reset
(RES)
Ready
(RD)
Power-on timing chart
No (ON)
Yes (OFF)
Trouble (ALM)