Timing Chart - Mitsubishi Electric MELSERVO-J4 Series Instruction Manual

Timing chart

When you use the forced stop deceleration function
To enable the function, set "2 _ _ _ (initial value)" in [Pr. PA04].
■Servo-on command (from controller) on/off
Keep the ready-on command (from controller) on while the servo-on command (from controller) is off. When
the ready-off command (from controller) is off, Tb [Pr. PC02 Electromagnetic brake sequence output] does not
function.
When servo-on command is turned off, the servo lock will be released after Tb [ms], and the servo motor will coast. If the
electromagnetic brake is enabled during servo-lock, the brake life may be shorter. Therefore, set Tb about 1.5 times of the
minimum delay time where the moving part will not drop down for a vertical axis system, etc.
Servo motor speed
Base circuit
MBR
(Electromagnetic
brake interlock)
Servo-on command
(from controller)
Ready-on command
(from controller)
Operation command
(from controller)
Electromagnetic
brake
*1 ON: Electromagnetic brake is not activated.
OFF: Electromagnetic brake is activated.
*2 Electromagnetic brake is released after the release delay time of electromagnetic brake and operation time of external circuit relay, etc.
For the release delay time of electromagnetic brake, refer to "Servo Motor Instruction Manual (Vol. 3)".
*3 Give the operation command from the controller after the electromagnetic brake is released.
3 SIGNALS AND WIRING
120
3.9 Servo motor with an electromagnetic brake
0 r/min
Approx. 95 ms
ON
OFF
Approx. 95 ms
ON
*1
OFF
ON
OFF
ON
OFF
0 r/min
Release
Activate
Tb [Pr. PC02 Electromagnetic brake sequence output]
*3
Release delay time and external relay, etc.
Operation delay
time of the
electromagnetic
brake
*2