8 USING STO FUNCTION
8.1 Introduction
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8
USING STO FUNCTION
Precautions
• In the torque mode, the forced stop deceleration function cannot be used.
8.1
Introduction
This section provides the cautions of the STO function.
To extend functional safety by setting [Pr. PSA01.0] to "1", refer to the following.
Page 150 USING FUNCTIONAL SAFETY
Precautions
• Do not improperly install safety-related components or systems. Installation should be performed by qualified personnel.
Outline
This drive unit complies with the following safety standards.
Terms related to safety
The STO function shuts off energy to servo motors, thus removing torque. MR-J5D_ shuts off the energy by turning off the
power supply electronically in the drive unit.
The purpose of this function is as follows.
• Uncontrolled stop according to stop category 0 of IEC/EN 60204-1
• Preventing unexpected restart
Precautions
The following basic safety instructions must be read carefully and fully to prevent injury to persons or damage to property.
Only qualified personnel are authorized to install, startup, repair, or adjust the machines in which these components are
installed.
They must be familiar with all applicable local regulations and laws in which machines with these components are installed,
particularly the standards mentioned in this user's manual.
The staff responsible for this work must be given express permission from the company to perform startup, programming,
configuration, and maintenance of the machine in accordance with the safety standards.
This drive unit satisfies the Safe Torque Off (STO) function described in IEC/EN 61800-5-2 by preventing the energy supply
from the drive unit to the servo motor. If an external force acts upon the drive axis, additional safety measures, such as brakes
or counterbalances must be used.
Item
MR-J5D_
Safety sub-function
STO (IEC/EN 61800-5-2)
Satisfied standards
EN ISO 13849-1:2015 Category 4 PL e, IEC 61508 SIL 3, EN 62061 SIL CL 3, EN 61800-5-2
