LSIS XDL-L7NH Series, User Manual, Page: 154 / 348

6. Safety Functions
6-6
6.5
Precautions for Using Safety Function
 When using the STO function, be sure to carry out risk assessment for the device to check if the
safety requirements of the system are met.
 There may be risks even if the STO function works.
 At the STO state, the motor is operated by an external force; thus, if the load needs to be
maintained, arrange a separate measure such as external mechanical brake. The brake of the
servo system is dedicated for maintaining the load; thus, be careful not to use it to brake the motor.
 If no external force exists and free-run stop is configured in the dynamic brake control mode setting
(0x2012), note that the braking distance of load will be extended.
 The purpose of the STO function is not to block the servo drive power or electrically insulate the
drive. That is why you have to disconnect the servo drive power before carrying out the
maintenance of any sub-drive.