Mitsubishi Electric MELSERVO-J5 MR-J5 Series User Manual page 352

■Stop by forced stop deceleration (SD)
For the operation of the forced stop deceleration, refer to the following.
Page 123 Forced stop deceleration function
When the SS1 function is activated, the servo motor decelerates in accordance with the value set in [Pr. PC24 Deceleration
time constant at forced stop]. Once the servo motor speed changes to a speed equal to or less than the speed set in [Pr.
PC07 Zero speed] after completion of the deceleration command, the base circuit shuts off and the dynamic brake is activated
after the delay time set in [Pr. PC02 Electromagnetic brake sequence output] has elapsed. If the SS1/SS2 deceleration
monitor time is shorter than the deceleration stop time, the STO function is activated during deceleration. When performing
deceleration monitoring, if [Pr. PSA24 SS1/SS2 deceleration monitor time constant] is shorter than [Pr. PC24], the observation
speed will be exceeded and the STO function is activated.
Servo motor speed
SS1C (SS1 command)
MBR
(Electromagnetic
brake interlock)
Base circuit
(energy supply to
servo motor)
STOS (STO output)
■Dynamic brake stop (DB)
When the SS1 function is activated, dynamic brake stop is executed. For the dynamic brake operation, refer to "Dynamic
brake characteristics" in the following manual.
MR-J5 User's Manual (Hardware)
When the deceleration monitoring function is enabled, if the deceleration monitor time constant is shorter than the braking
time during dynamic brake operation, the observation speed will be exceeded and an alarm will occur.
Servo motor speed
SS1C (SS1 command)
Base circuit
(energy supply to
servo motor)
STOS (STO output)
6 FUNCTIONAL SAFETY
350
6.4 Safety sub-function
0 r/min
(mm/s)
ON (disabled)
OFF (enabled)
ON (disabled)
OFF (enabled)
ON
OFF
Electromagnetic brake
ON
OFF (shut-off)
0 r/min
(mm/s)
ON (disabled)
OFF (enabled)
ON
OFF
ON
OFF (shut-off)
SS1 in progress
Deceleration stop
SS1/SS2 deceleration monitor time
Model speed command = 0 and speed is
equal to or less than zero speed
sequence output
SS1 in progress
SS1/SS2 deceleration monitor time
STO state
Stop with dynamic brake
STO state
Stop with dynamic brake