Siemens SINUMERIK 828D Function Manual page 1435

The following problems can occur if tool management is not active:
• D compensation data set missing
• Error in part program
Note
The "tool not in magazine" problem cannot be detected since the NCK did not have
access to any magazine information during tool compensation.
D compensation data set missing
Program execution is interrupted at the block containing the invalid D value (regardless of the value of machine
data MD22550). The operator must either correct the program or reload the missing data set.
To do this, he needs the D number for the flat D number function, or otherwise the T number as well. These
parameters are transferred when the alarm is triggered.
Error in part program
The options for intervention in the event of an error depend on how the tool change was programmed, defined via
the machine data:
MD22550 $MC_TOOL_CHANGE_MODE (new tool compensation with M function).
Tool change with T programming (MD22550 = 0)
In this case, the "Compensation block" function available in the NCK is used. The NC program stops at the NC
block in which a programmed T value error was detected. The "Compensation block" is executed again when the
program is resumed.
The operator can intervene as follows:
• Correct the part program.
• Reload the missing cutting edge compensation data from the HMI.
• Include the missing cutting edge compensation data in the NCK using "Overstore".
Following operator intervention, the START key is pressed and the block, which caused the error, is executed
again. If the error was corrected, the program is continued. Otherwise, an alarm is output again.
Tool change with T and M06 programming (MD22550 = 1)
In this case, an error is detected in the NC block containing the tool preparation (T programming), however this
error is to be ignored initially. Processing continues until the tool change request (usually M06) is executed. The
program is to stop at this point.
The programmed T address can contain any number of program lines ahead of the M06 command, or the two
instructions can appear in different (sub)programs. For this reason, it is not usually possible to modify a block or
a compensation block, which has already been executed.
The operator has the same options for intervention as with = 0.
Reloading of missing data is possible. In this case, however, T must be programmed with "Overstore".
If a program error has occurred, the line with the error cannot be corrected (Txx); only the line at which the
program stopped and which generated the alarm can be edited. Only when machine data:
MD22562 $MC_TOOL_CHANGE_ERROR_MODE Bit0 = 1 (response on errors in tool change).
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
W1: Tool offset
18.2 Tool
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