Mitsubishi Electric MELSERVO-J4 MR-J4 A Series - Timing Chart

3. SIGNALS AND WIRING
3 - 14
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 (3-phase: L1, L2, and L3, 1-phase: L1 and L3). 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 (L11 and L21) 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 receives the SON (Servo-on) 2.5 s to 3.5 s after the main circuit power supply
is switched on. Therefore, when SON (Servo-on) is switched on simultaneously with the main
circuit power supply, the base circuit will switch on in about 2.5 s to 3.5 s, and the RD (Ready) will
switch on in further about 5 ms, making the servo amplifier ready to operate. (Refer to (2) of this
section.)
4) When RES (Reset) is switched on, the base circuit is shut off and the servo motor shaft coasts.
(2) Timing chart
95ms
95ms
RD(Ḱ஻ቢ)
RES(࡝࠮࠶࠻)
SON(ࠨ࡯ࡏࠝࡦ)
OFF
ON
OFF
ON
ON
OFF
ࡌ࡯ࠬ࿁〝
OFF
ON
㔚Ḯ
OFF
ON
10ms5ms
10ms
10ms5ms
10ms
5ms 10ms
(2.5s䌾3.5s)
SON(ࠨ࡯ࡏࠝࡦ)ฃઃߌ
࿁〝
೙ᓮ࿁〝
᦭(OFF)
ή(ON)
A
LM(᡿㓚)
2.5s䌾3.5s
Main circuit
Control circuit
Power supply
SON (Servo-on) accepted
Base circuit
SON (Servo-on)
RES (Reset)
RD (Ready)
ALM (Malfunction)
(2.5 s to 3.5 s)
(2.5 s to 3.5 s)
ON (no alarm)
OFF (alarm)