Siemens SINUMERIK 840D sl Series Diagnostics Manual page 824

Overview of Alarms
• 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 rib-
bon 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 Con- Clear alarm with the RESET key in all channels. Restart part program.
tinuation:
300200
Drive bus hardware fault
Definitions: The drive bus has a fault. The following causes are possible:
• The bus terminator is missing.
• The drive bus is physically interrupted at some point.
• Miscellaneous hardware fault.
A check line is tested that runs over the entire bus and returns from the last rack location
(bus terminator) back to the NCK.
Note: If the drive ramps up correctly even though this message appeared, the error
existed only at the beginning of the initialization. In spite of this, the drives can be capable
of functioning.
Reactions: - Mode group not ready.
- The NC switches to follow-up mode.
- Channel not ready.
- NC Start disable in this channel.
- Interface signals are set.
- Alarm display.
Remedy: Please inform the authorized personnel/service department.
• Check the bus terminator.
• Check all plug connections from the drive bus to the drive modules.
• Other hardware faults.
If the remedial measures given above do not lead to a change in the behaviour when
starting, please contact the system support for the A&D MC products of SIEMENS AG
through the Hotline (tel.: see alarm 1000).
Program Con- Switch control OFF - ON.
tinuation:
300201
Axis %1 drive %2 timeout during access, error location %3
Parameters: %1 = NC axis number
%2 = Drive number
%3 = Error location
Definitions: The read cycle of a drive address in the initialization phase or in cyclic operation has not
ended within the monitoring time (approx. 1 ms) (timeout error).
The error can occur in conjunction with a power failure of one or several drive modules. A
hardware fault might also be the cause (ASICs, bus, drive modules).
Reactions: - NC not ready.
- The NC switches to follow-up mode.
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SINUMERIK 840D sl/840D/840Di/810D Diagnostics Guide (DA), 08/2005 Edition
© Siemens AG, 2005. All rights reserved
08/2005