General
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The following describes the residual risks related to the safety function of this
equipment.
Common residual risks
● Before shipping the equipment to end users, check the settings of safety-related
parts using the programming tool and the display. Record and save the settings
related to the safety monitoring function and the programming tool that you use.
Use a checklist during this process.
●
Safety rests with proper installation, wiring, and tuning. Follow instructions in the
safety guide during installation, wiring, and commissioning.
●
Installation, trial run, repair, and commissioning must be carried out by skilled
personnel only. Only relevant safety engineers are allowed to install and operate
the equipment.
● Separate the wiring for the safety function from other signal wiring.
● Protect cables using proper methods (such as using cable guards when routing in
a cabinet).
● Use switches, relays, and sensors that comply with safety standards. If switches,
relays, or sensors that do not comply with safety standards are used, verify the
safety.
● Reserve adequate clearances or creepage distances based on the voltage used.
● The time error in safety monitoring depends on parameter settings.
● STO
This function cuts off only the motor torque but not the drive power supply. Before
drive maintenance, cut off the power supply to the drive and confirm that the
drive is de-energized.
Note
Power on to reset the AC drive, and then trigger the STO function at least once every
three months.
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