16
1 FUNCTION
1.1 Function explanation
Functional safety
*1 "Ver." indicates the supported firmware version of the servo amplifier. The functions are available on servo amplifiers with the indicated
firmware version or later.
Functions
Detailed functions
Description
Ver.
MR-J5
Detailed explanation
G
A
Safety sub-function
STO (Safe torque off)
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.
B2
SS1 (Safe stop 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.
B2
SS2 (Safe stop 2)
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.
B2
SOS (Safe operating stop)
This function monitors whether the servo motor stops
within the prescribed range. Energy is supplied to the
servo motor.
B2
SLS (Safely-limited speed)
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.
B2
SSM (Safe speed monitor)
This function outputs signals when the servo motor
speed is below the prescribed speed.
B2
SBC (Safe brake control)
This function outputs signals for controlling the
external brake.
B2
SDI (Safe direction)
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.
B2
SLI (Safely-limited increment)
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.
B2
SLT (Safely-limited torque)
This function monitors whether the torque is below the
specified torque. If the torque exceeds the specified
torque, the STO will shut off energy.
B2
Status monitor (SM: Status monitor)
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.
B2