Mitsubishi Electric MELSERVO-J5 MR-J5 Series User Manual page 16

Functional safety
Functions Detailed functions
Safety sub-function STO (Safe torque off)
SS1 (Safe stop 1)
SS2 (Safe stop 2)
SOS (Safe operating stop)
SLS (Safely-limited speed)
SSM (Safe speed monitor)
SBC (Safe brake control)
SDI (Safe direction)
SLI (Safely-limited increment)
SLT (Safely-limited torque)
Status monitor (SM: Status
monitor)
1 FUNCTION
14
1.1 Function explanation
Description
This function electrically shuts off the servo motor
driving energy with input signals from external
devices (shut-off by the secondary-side output).
This is equivalent to the stop category 0 of IEC/
EN 60204-1.
This function starts deceleration with input
signals from external devices. After the specified
time to confirm the motor stop, the STO function
is executed (SS1). This is equivalent to the stop
category 1 of IEC/EN 60204-1.
This function starts deceleration with input
signals from external devices. After the specified
time to confirm the motor stop, the SOS function
is executed (SS2). This is equivalent to the stop
category 2 of IEC/EN 60204-1.
This function monitors whether the servo motor
stops within the prescribed range. Energy is
supplied to the servo motor.
This function monitors whether the speed is
within the prescribed speed limit. If the speed
exceeds the specified speed limit, the STO will
shut off energy.
This function outputs signals when the servo
motor speed is below the prescribed speed.
This function outputs signals for controlling the
external brake.
This function monitors whether the servo motor
travels in the specified direction. If the servo
motor travels in a direction different from the
specified direction, the STO will shut off energy.
This function monitors whether the travel
distance of the servo motor is within the specified
range. If the travel distance of the servo motor
exceeds the specified range, the STO will shut off
energy.
This function monitors whether the torque is
below the specified torque. If the torque exceeds
the specified torque, the STO will shut off energy.
This function outputs the statuses of the safety
sub-functions as signals. This is a function
designed specifically for the safety sub-functions
and differs from the function defined in IEC/EN
61800-5-2.
MR-J5 Detailed explanation
firmware
version
G A
 Page 342 STO
B2
function
 Page 345 SS1
B2
function
 Page 352 SS2/SOS
B2
function
B2 
 Page 358 SLS
B2
function
 Page 362 SSM
B2
function
 Page 363 SBC
B2
function
 Page 364 SDI function
B2
 Page 367 SLI function
B2
 Page 369 SLT function
B2
 Page 373 Status
B2
monitor (SM) function