MITSUBISHI ELECTRIC MR-E- A/AG - Manual (Page 67)

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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 power supply (three-phase 200V: L 1 , L 2 , L 3 , single-phase 230V: L 1 , L 2 ). Configure up an
external sequence to switch off the magnetic contactor as soon as an alarm occurs.
2) The servo amplifier can accept the servo-on signal (SON) 2s or more after the power supply is
switched on. Therefore, when SON is switched on simultaneously with the power supply, the base
circuit will switch on in about 1 to 2s, and the ready signal (RD) will switch on in further about
20ms, making the servo amplifier ready to operate. (Refer to paragraph (2) in this section.)
3) When the reset signal (RES) is switched on, the base circuit is shut off and the servo motor shaft
coasts.
(2) Timing chart
20ms 20ms 20ms 10ms 10ms
10ms 10ms
10ms
60ms
60ms
ON
OFF
ON
OFF
ON
OFF
ON
OFF
ON
OFF
power supply
Base circuit
Servo-on
(SON)
Reset
(RES)
Ready
(RD)
SON accepted
(1 to 2s) 2s or longer
(3) Emergency stop
Make up a circuit which shuts off power as soon as EMG-SG are opened at an emergency stop. To
ensure safety, always install an external emergency stop switch across EMG-SG. By disconnecting
EMG-SG, the dynamic brake is operated to bring the servo motor to a sudden stop. At this time, the
display shows the servo emergency stop warning (AL.E6).
During ordinary operation, do not use the external emergency stop signal to alternate stop and run.
The servo amplifier life may be shortened.
Also, if the start signal is on or a pulse train is input during an emergency stop, the servo motor will
rotate as soon as the warning is reset. During an emergency stop, always shut off the run command.
VIN
EMG
SG
Emergency
stop
External power
supply 24VDC