Siemens Sinumerik 840D sl Diagnostic Manual page 104

Overview of Alarms
NCK alarms
Definitions: A tool T... must be selected so that the control can make allowance for the associated compensation
values.
A correction data block (D1) containing the correction values (parameter P1 - P25) is automatically
assigned to each tool (T number). Up to 9 correction data blocks can be assigned to a tool by speci-
fying the required data block with the D number (D1 - D9).
The cutter radius compensation (CRC) is allowed for if function G41 or G42 is programmed. The cor-
rection values are contained in parameter P6 (geometry value) and P15 (wear value) of the active cor-
rection data block Dx.
Reaction: Correction block is reorganized.
Interpreter stop
Local alarm reaction.
Interface signals are set.
Alarm display.
Remedy: Before calling the CRC with G41/G42, program a tool number under the address T...
Program Con- Clear alarm with NC START or RESET key and continue the program.
tinuation:
10751 [Channel %1: ] Block %2 danger of collision due to tool radius
compensation
Parameters: %1 = Channel number
%2 = Block number, label
Definitions: The "Bottleneck detection" (calculation of intersection for the following compensated traversing
blocks) has not been able to calculate a point of intersection for the reviewed number of traversing
blocks. It is therefore possible that one of the equidistant paths violates the workpiece contour.
Reaction: Correction block is reorganized.
Local alarm reaction.
Interface signals are set.
Alarm display.
NC Stop on alarm at block end.
Remedy: Please inform the authorized personnel/service department. Check the part program and, if possible,
modify the programming so that inside corners with smaller paths than the correction value are
avoided. (Outside corners are not critical because the equidistants are lengthened or intermediate
blocks are inserted, so that there is always a point of intersection).
Increase the number of reviewed traversing blocks via machine data MD20240
$MC_CUTCOM_MAXNUM_CHECK_BLOCKS (default: 3), this increases the amount of calculation
and consequently also the block cycle time.
Program Con- Clear alarm with NC START or RESET key and continue the program.
tinuation:
10752 [Channel %1: ] Block %2 overflow of local block buffer with tool radius
compensation
Parameters: %1 = Channel number
%2 = Block number, label
Definitions: The cutter radius compensation must buffer a variable number of intermediate blocks in order to
enable calculation of the equidistant tool path for each NC block. The size of the buffer cannot be
determined by simple means. It depends on the number of blocks without traversing information in the
compensation plane, the number of contour elements to be inserted and the shape of the curvature
in spline and polynomial interpolation.
The size of the buffer is fixed by the system and cannot be changed via the MDs.
Reaction: Correction block is reorganized.
Local alarm reaction.
Interface signals are set.
Alarm display.
NC Stop on alarm at block end.
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SINUMERIK 840D sl, 840Di sl, SINAMICS, Diagnostics Manual (DAsl), 03/2009
© Siemens AG, 2009. All Rights Reserved
03/2009