Servo Amplifier Initializing Time - Mitsubishi Electric MELSERVO-J2S Series Transition Handbook

Part 7: Common Reference Material

1.2.8 Servo amplifier initializing time

This section explains the initializing time of the servo amplifier (the time taken between power-on and servo-
on reception). The initializing time is 2 s at maximum for the MR-J2S-_A_servo amplifier, but 3.5 s at
maximum for the MR-J4-_A_servo amplifier. Note the initializing time difference upon replacement.
<Points to note upon replacement>
(1) When using the electromagnetic brake to prevent a drop in a vertical lift application or the like with an
external timer to adjust the brake release time, the lift may drop due to a longer servo-lock time.
Adjust the brake release time as necessary or use MBR (electromagnetic brake interlock signal).
(2) A longer servo-on time at power-on may cause a delay in the servo motor starting time after power-
up. Please take note.
(1) MR-J2S-_A_ series servo amplifier
The initializing time is 1 to 2 s.
Main circuit
Control circuit power supply
Base circuit
Servo on (SON)
Reset (RES)
Ready (RD)
Alarm (ALM)
(2) MR-J2M-P8A series servo amplifier
The initializing time is 3 s.
Main circuit
power supply
Control circuit
Base circuit
Servo on (SON□)
Reset (RES□)
Ready (RD□)
Servo-on (SON) accepted
(1 to 2s)
0.02s
(About 1s)
SON accepted
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