4 - 9
4. SIGNALS AND WIRING
4.3.2 Power-on sequence
(1) Power-on procedure
1) Always wire the power supply as shown in above section 4.1 using the magnetic contactor with the main
circuit power supply (three-phase: L
1
, L
2
, L
3
, single-phase: 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 L11, 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 can accept the servo-on (RYn0) about 1 to 2s after the main circuit power supply is
switched on. Therefore, when servo-on (RYn0) 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 (RY(n+1)A or RY(n+3)A) is switched on, the base circuit is shut off and the servo motor
shaft coasts.
(2) Timing chart
95ms
95ms
OFF
ON
OFF
ON
ON
OFF
OFF
ON
OFF
ON
10ms
5ms
10ms
10ms
5ms
10ms
5ms
10ms
(2 to 2.5s)
Servo-on (RYn0) accepted
Main circuit
Control circuit
Power supply
Base circuit
Servo-on
(RYn0)
Reset
(RY(n+1)A
or RY(n+3)A)
Ready
(RD)
Power-on timing chart
Summary of Contents for MELSERVO MR-J3-xT
Page 22: ...8 MEMO ...
Page 156: ...4 46 4 SIGNALS AND WIRING MEMO ...
Page 276: ...7 26 7 MR Configurator MEMO ...
Page 324: ...10 16 10 SPECIAL ADJUSTMENT FUNCTIONS MEMO ...
Page 418: ...14 66 14 OPTIONS AND AUXILIARY EQUIPMENT MEMO ...