General
‑19‑
is recommended that a Certification Body final safety certification of the system be
used.
The following shows residual risks concerning the safety function of this product.
Common residual risks
● At the shipment to end‑users, check the settings of safety related components
with programming tools and monitored/displayed contents on display and record
and save the setting data concerning the safety observation function and the
programming tools you used. Perform them using a check sheet, etc.
● The safety will not be ensured such as in assembling machine until installing,
wiring, and adjustment are completed properly. Install, wire, and adjust your
system referring to installation guide for each unit.
● Only qualified personnel are authorized to install, start‑up, repair or adjust the
machines in which these components are installed. Only trained engineers should
install and operate the equipment.
● Separate the wiring for safety observation function from other signal wiring.
● Protect the cables with appropriate ways (routing them in a cabinet, using a cable
guard, etc.).
● We recommend using a switch, relay, sensor, etc. which comply with safety
standards. When using a switch, relay, sensor, etc. which do not comply with
safety standards, perform a safety confirmation.
● Keep the required clearance/creepage distance depending on voltage you use.
● The time to a safety observation error depends on parameter settings.
Safe torque off (STO)
This function only cuts off the torque of the motor, and does not cut off the power
supply of the servo/inverter. Before servicing the servo/inverter, cut off the power
supply and ensure that the servo/inverter are not energized.
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