Siemens SINUMERIK 840Di Diagnostic Manual page 390

Overview of Alarms
NCK alarms
21701 Channel %1 block %3 axis %2 measurement not possible
Parameters: %1 = Channel number
%2 = Axis name, spindle number
%3 = Block number
Definitions: Measurement level 2 (MEASA, MEAWA, MEAC).
There is an error in the programmed measurement task.
Possible causes:
- Invalid measurement mode
- Invalid probe
- Invalid encoder
- Invalid number of measurement signal edges
- Identical measurement signal edges are only programmable in mode 2
- Invalid FIFO number
- Mismatch between the number of FIFOs programmed and the number of probes used in the
measurement task.
Further causes:
A measurement task is already active (e.g. from a synchronized action).
Reaction: Local alarm reaction.
NC Start disable in this channel.
Interface signals are set.
Alarm display.
NC Stop on alarm.
Remedy: Correct the measurement tasks.
Program Clear alarm with the RESET key. Restart part program
Continuation:
21702 Channel %1 block %3 axis %2 measurement aborted
Parameters: %1 = Channel number
%2 = Axis name, spindle number
%3 = Block number
Definitions: The measurement block has ended (the programmed end position of the axis has been reached) but
the activated touch probe has not yet responded.
Measurement level 2 (MEAWA, MEASA, MEAC)
Measured values cannot be converted to the workpiece coordinate system. The measured values of
the GEO axes programmed in the measurement task are only available in the machine coordinate
system.
Causes:
Not all GEO axes were programmed in the measurement task. At least one measured value is
therefore missing for conversion back into the workpiece coordinate system.
Further causes:
The measurement tasks programmed for all GEO axis are not identical.
Reaction: Alarm display.
Remedy: Verify the traversing movement in the measurements block.
- Is it necessary in all cases for the activated probe to have switched up to the specified axis position?
- Are the probe, cable, cable distributor, terminal connections in good order?
Either program all GEO axes explicitly or program the traversing movement with the POS[axis]
command.
Program Clear alarm with the Delete key or NC START.
Continuation:
2-390
© Siemens AG, 2006. All rights reserved
SINUMERIK, SIMODRIVE Diagnostics Manual (DA), 11/2006 Edition
11/2006