Siemens SINUMERIK 840Di Diagnostic Manual page 694

Overview of Alarms
SIMODRIVE alarms
300100 Drive power failure
Definitions: 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.
Reaction: 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.
Remedy: Switch off the power to the system and switch on again - the drives start up again.
Program Clear alarm with the RESET key in all channels. Restart part program.
Continuation:
300101 Bus communications failure
Definitions: This alarm indicates that there is still no power supply to the drives although the NC is already running.
This message comes only if no drive module has been signaled. (In theory, it could also be a bus error
interrupting the connection to the 1st module).
Reaction: 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.
Remedy: 1) If the NCU has its own power supply, then the drives still have no power.
- If possible, switch on the power supply for the drives at the same time as the NCU.
2) If the NCU and the drives have the same power supply then not even the first module could be
recognized. Check whether the red LED on the first drive module is illuminated. If this is not the case,
then usually the module does not have any power.
- Check the connections of the ribbon cable running from your I/RF or monitoring unit to the module.
- If after switching on the I/RF or monitoring unit, no LED of a module which is connected to it is
illuminated, then check the I/RF or monitoring unit and, if required, replace the ribbon cable.
3) Check whether all drive bus connectors have correctly snapped into place and that the bus
terminaor is connected.
4) If you have not been able to detect an error by now, the module is defective.
- Replace the module.
Program Clear alarm with the RESET key in all channels. Restart part program.
Continuation:
2-694
© Siemens AG, 2006. All rights reserved
SINUMERIK, SIMODRIVE Diagnostics Manual (DA), 11/2006 Edition
11/2006