Setting Method [A]; Timing Chart [G] [B] - Mitsubishi Electric MELSERVO-J5 User Manual

Setting method [A]

Set [Pr. PA04.3 Forced stop deceleration function selection] to enable/disable the forced stop deceleration function. Setting
[Pr. PA04.3 Forced stop deceleration function selection] to "2" (Forced stop deceleration function enabled) operates the
forced stop deceleration function when EM2 (Forced stop 2) is turned off. In addition, set the level of ZSP (Zero speed
detection) and the amount of time to reach 0 [r/min] or [mm/s] from the rated speed by using [Pr. PC17 Zero speed] and [Pr.
PC51 Deceleration time constant at forced stop].
Servo parameter
PA04.3
PC17
PC51

Timing chart [G] [B]

When EM2 (Forced stop 2) is turned off, the servo motor decelerates in accordance with the value of [Pr. PC24 Deceleration
time constant at forced stop]. Once the servo motor speed becomes below [Pr. PC07 Zero speed] after completion of the
deceleration command, the base circuit will be shut off and the dynamic brake will activate.
EM2 (Forced stop 2)
Rated speed
Servo motor speed
Base circuit
(Energy supply to the
servo motor)
MBR
(Electromagnetic brake
interlock)
Servo-on command
(from controller)
Ready-on command
(from controller)
3 BASIC FUNCTION
172
3.17 Forced stop deceleration function
Symbol Name
*AOP1 Forced stop
deceleration function
selection
ZSP Zero speed
RSBR Deceleration time
constant at forced stop
ON
OFF (Enabled)
Normal
operation
0 r/min
ON
OFF
ON
OFF (Enabled)
ON
OFF
ON
OFF
Outline
Set "Forced stop deceleration function" to enabled/disabled.
0: Forced stop deceleration function disabled (EM1 is used)
2: Forced stop deceleration function enabled (EM2 is used) (initial value)
Set the level of ZSP (Zero speed detection).
Initial value: 50 [r/min], [mm/s]
Set the deceleration time constant at forced stop.
Initial value: 100 [ms]
Dynamic brake
Forced stop
deceleration electromagnetic brake
Command
Zero speed ([Pr. PC07])
Deceleration time
[Pr. PC24]
+