2. SIGNALS AND WIRING
2.6.2 MR-J4-03A6-RJ
(1) Power-on procedure
1) When wiring the power supply, always use a circuit protector for the power supply (24/PM).
Configure up an external sequence so that the relay connected to PM turns off when an alarm
occurs.
2) Switch on the control circuit power supply (24/0) simultaneously with the main circuit power
supply (PM/0) 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) within 4 s to 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 4 s to 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
Main circuit
Power supply
Control circuit
Base circuit
SON (Servo-on)
RES (Reset)
RD (Ready)
No alarming (ON)
ALM (Malfunction)
Alarming (OFF)
SON (Servo-on) accepted
(4 s to 5 s)
ON
OFF
ON
OFF
ON
OFF
ON
OFF
5 ms
ON
OFF
4 s to 5 s
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10 ms
10 ms
95 ms
10 ms
5 ms
10 ms
95 ms
5 ms
10 ms