Moons' MBDV Series - STO - Safe Torque off Function; Safe Torque off Precautions

52
Rev. 2.0
07/27/2023
MBDV Hardware Manual
◆
A/B/Z phase connection example
上位机
A+
伺服驱动器
A-
B+
B-
Z+
Z-
AOUT+
AOUT-
BOUT+
BOUT-
ZOUT+
ZOUT-
FG FG
10Ω
DGND
DGND
10Ω
10Ω
10Ω
10Ω
10Ω
Note: Make sure to connect the host computer to the digital ground of the drive.
4.11 STO - Safe torque o󰀨 function
The MBDV series servo drives support Safe Torque O󰀨 functionality. Each drive comes with an
STO port for users to connect their STO trigger mechanism to.
Safe Torque O󰀨 is a hardware level safety function. While the STO function is enabled, the
physical connection between motor and drive is disabled, thereby preventing the motor from
being energized. This function is meant to protect personnel as well as equipment in emergency
situations.
When the STO function is enabled, the servo motor becomes disabled, the drive enters an alarm
state and the LED display on the driver panel display the alarm code "
".
4.11.1 Safe Torque O󰀨 Precautions
1) If STO is not required in the application, the premade STO connector provided with the drive
should be connected in the STO port on the drive.
2) Before using the STO function, users should ensure that they are familiar with how STO works
and the scenarios in which it is appropriate to use it.
3) When the STO function is working, due to the existence of external force (such as vertical shaft
load), the motor will rotate due to the external force. Therefore, please make sure to use the servo
motor with brake in this case, and connect the brake control circuit correctly.
4) When the STO function is triggered, the motor's shaft rotates freely. If the motor is in motion or
under the inuence of an external load, its stopping distance will be a󰀨ected by the inertia of the
system.
5) While the STO function is enabled, the output power from drive to motor is cut o󰀨. However, the
power supply powering the servo drive remains on. If users need to troubleshoot the servo drive
and motor, they must ensure that the power supply powering the entire system (motor and drive) is
powered o󰀨.
6) While the STO function is enabled, the drive will be in an alarm state and the motor will be
disabled.
7) When the STO function is disabled (no longer in use), the STO alarm status of the drive is
automatically cleared. The drive will also output a Servo Ready signal but the motor will be
disabled.