Sls Function - Mitsubishi Electric MR-D30 Instruction Manual

4. SAFETY OBSERVATION FUNCTION
(d) SLS/SS2/SOS speed detection delay time
You can set a delay time for from when the speed decelerates lower than the standstill speed until
the start of the stop observation and for from when the speed accelerates higher than the standstill
speed during stop observation until the start of the STO function by using [Pr. PSA15 SLS/SS2/SOS
speed detection delay time].
(e) SOS position detection delay time
You can set a delay time for from when the travel distance exceeds a threshold until the start of the
STO function by using [Pr. PSA17 SOS position detection delay time].

4.5.4 SLS function

(1) Summary
This is a function to observe whether the speed is within a regulated speed limit value. When a specified
speed is exceeded, energy will be shut off by STO. The STO function operates when the servo motor
speed exceeding the SLS speed is detected. The SLS function observes both command speed and
feedback speed.
(2) Summary of sequence
The SLS function starts when SLS_C (SLS command) is turned off. Speed observation will be started
when the delay time specified with the parameter has passed after SLS_C (SLS command) is turned off.
During the speed observation, the servo motor speed is observed to be equal to or less than the SLS
speed specified with the parameter. The speed observation will be terminated by turning on SLS_C
(SLS command).
Servo motor speed
SLS1C
(SLS1 command)
SLS1S
(SLS1 output)
(3) Parameter switching
With the SLS function, four patterns of SLS speed and SLS deceleration monitoring time can be set. The
following table shows SLS deceleration monitoring time and SLS speed enabled with each command of
SLS1, SLS2, SLS3, and SLS4.
SLS command
SLS1 command
SLS2 command
SLS3 command
SLS4 command
SLS monitoring
deceleration time 1
0 r/min
ON (disabled)
OFF (enabled)
ON (disabled)
OFF (enabled)
SLS deceleration monitoring time
[Pr. PSA07 SLS deceleration monitoring time 1] [Pr. PSA11 SLS speed 1]
[Pr. PSA08 SLS deceleration monitoring time 2] [Pr. PSA12 SLS speed 2]
[Pr. PSA09 SLS deceleration monitoring time 3] [Pr. PSA13 SLS speed 3]
[Pr. PSA10 SLS deceleration monitoring time 4] [Pr. PSA14 SLS speed 4]
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Speed observation
in progress
SLS speed 1
SLS speed