18
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.
*1
Detailed explanation
[G] [B] [A]
J5 J5D
Safety sub-
function
STO (Safe torque off)
(When functional safety
parameters are not used)
This servo amplifier supports the STO function
for functional safety as per IEC/EN 61800-5-2.
This allows a safety system to be easily
configured for the equipment.
A0 C0 C4 A0 Refer to "USING STO
FUNCTION" in the
following manuals.
MR-J5 User's Manual
(Hardware)
MR-J5D User's
Manual (Hardware)
STO (Safe torque off)
(When functional safety
parameters are used)
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 C0 Page 453 STO
function
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 C0 Page 456 SS1
function
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 C0 Page 464 SS2/SOS
function
SOS (Safe operating stop) This function monitors whether the servo motor
stops within the prescribed range. Energy is
supplied to the servo motor.
B2 C0
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 C0 Page 470 SLS
function
SSM (Safe speed monitor) This function outputs signals when the servo
motor speed is below the prescribed speed.
B2 C0 Page 474 SSM
function
SBC (Safe brake control) This function outputs signals for controlling the
external brake.
B2 C0 Page 475 SBC
function
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 C0 Page 476 SDI
function
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 C0 Page 479 SLI function
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
C0 Page 481 SLT
function
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 C0 Page 485 Status
monitor (SM) function
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