Drive power failure
In one or several (all) drive modules, there is a power failure although power was previously available. (The timeout is checked for write/read accesses. Timeouts are interpreted as power failure because this is the most probable case. The test takes place in the cyclic mode only but not at system power-up.)
Since the drives in the SINUMERIK 840D and the NC-CPU have the same power supply, this error does not occur here because then the NCU is also without power supply. In the SINUMERIK FM-NC, this error can arise because the power supply is separate.
- NC not ready.
- The NC switches to follow-up mode.
- Channel not ready.
- NC Start disable in this channel.
- Interface signals are set.
- Alarm display.
- NC Stop on alarm.
Switch off the power to the system and switch on again - the drives start up again.
Clear alarm with the RESET key in all channels. Restart part program.
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