Mitsubishi Electric MR-JE-_A, Instruction Manual

Page: 52 / 370

3. SIGNALS AND WIRING
3 - 17
3.3.2 Power-on sequence
POINT
The voltage of analog monitor output, output signal, etc. may be unstable at
power-on.
(1) Power-on procedure
1) Always wire the power supply as shown in above section 3.1 using the magnetic contactor with
the power supply (L1/L2/L3). Configure an external sequence to switch off the magnetic contactor
as soon as an alarm occurs.
2) The servo amplifier receives the SON (Servo-on) 2.5 s to 3.5 s after the power supply is switched
on. Therefore, when SON (Servo-on) is switched on simultaneously with the 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) in this section.)
3) When RES (Reset) is switched on, the base circuit is shut off and the servo motor shaft coasts.
(2) Timing chart
95 ms
95 ms
RD (Ready)
RES (Reset)
SON (Servo-on)
OFF
ON
OFF
ON
ON
OFF
Base circuit
OFF
ON
Power supply
OFF
ON
10 ms 5 ms
10 ms
10 ms 5 ms
10 ms
5 ms 10 ms
(2.5 s to 3.5 s)
SON (Servo-on) accepted
Alarm (OFF)
No alarm (ON)
ALM No alarm
(Malfunction)
2.5 s to 3.5 s