Safety Function Constraints; Failure Rate; Mission Time And Proof Test; Testing, Calibration Or Maintenance Requirements - Moons' M2DV-1D82D User Manual

M Series AC Servo
User Manual

11.5. Safety function constraints

11.5.1 Failure rate

The failure rates is calculation and estimated under the ambient 50℃.

11.5.2 Mission time and proof test

proof test intervals: 20 years, as appropriate
miss time: 20H each day, as appropriate

11.5.3 Testing, calibration or maintenance requirements

The testing, calibration or maintenance requirements need profession person.

11.5.4 Avoiding the systematic failure

1.) Be sure the STO work in reasonable environment
2.) Be sure the machine brake no loosen
3.) Be sure the motor work normally
4.) Make sure safety input cables status

11.5.5 SIL capability

The SIL capability of STO is 2

11.5.6 Identify the hardware and software configuration

Identify the hardware: When STO function work, drive hardware circuit is triggered, forced to shut off
the power transistor drive internal work to prevent motor rotating, and the drive is disable state. STO is
a kind of hardware level safety protection devices, to protect the safety of person and equipment in an
emergency
Identify the software: When STO Function active，the PWM drive signal is shut down by the hardware to
shut off the motor current, at the same time, the drive LED displays alarm code
When failure occurrence, you may check the two safety input wiring and terminal block if Loosen or
Rev. 1.1
9/13/2021
172
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400-820-9661