Checking The Reference Position (G27) - Siemens Sinumerik 840D sl Programming Manual

Drive commands
2.2 Reference point approach with G functions
2.2.2

Checking the reference position (G27)

Format
G27 X... Y... Z... ;
This function is used to check whether the axes are on their reference point.
Test procedure
If the check with G27 is successful, the processing is continued with the next part program
block. If one of the axes programmed with G27 is not on the reference point, Alarm 61816
"Axes not on reference point" is triggered and the Automatic mode is interrupted.
Note
Function G27 is implemented with the cycle cycle 328.spf as with G28.
To avoid a positioning error, the function "mirroring" should be deselected before executing
G27.
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Programming Manual, 06/09, 6FC5398-7BP10-1BA0
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