Mitsubishi Electric MELSERVO-J5 MR-J5 Series User Manual page 349

Deceleration monitoring function
When the SS1 command is input, this function starts deceleration and monitors whether the servo motor decelerates
according to the deceleration time constant. If the deceleration set by the functional safety parameter cannot be performed,
the STO function is executed. The STO function is activated even when the time specified by [Pr. PSA03 SS1/SS2
deceleration monitor time] has elapsed since the SS1 function was activated.
■Deceleration completion monitoring
After the SS1 command is turned off, speed monitoring starts after the time set in [Pr. PSA26 SS1/SS2 deceleration monitor
delay time] has elapsed.
During deceleration, when both the absolute value of the speed command and the absolute value of the speed feedback
become equal to or less than the value set in [Pr. PSA04 Safety sub-function - Stop speed], deceleration is considered to have
been completed. After the time set in [Pr. PSA15 Safety sub-function - Speed detection delay time] has elapsed, the STO
function is executed.
Deceleration monitor speed offset
0 r/min
Servo motor speed
(mm/s)
ON (disabled)
SS1C (SS1 command)
OFF (enabled)
ON (monitoring)
SS1S (SS1 output)
OFF
ON
STOS (STO output)
OFF (shut-off)
Deceleration monitor delay time
SS1/SS2 deceleration monitor time
Command
Stop speed
Deceleration
Deceleration monitor
time constant
Speed detection delay time
Feedback
6 FUNCTIONAL SAFETY
6.4 Safety sub-function
STO state
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