Siemens sinumerik 840D sl Operating Manual page 108

Machining the workpiece
4.1 Starting and stopping machining
Stopping machining
Canceling machining
108
Press the <CYCLE STOP> key.
Machining stops immediately. Individual program blocks are not
executed to the end. On the next start, machining is resumed
from the point where it left off.
Press the <RESET> key.
Execution of the program is interrupted. On the next start, machining
will start from the beginning.
Machine manufacturer
Please refer to the machine manufacturer's specifications.
Operating Manual, 07/2010, 6FC5398-8CP40-0BA0
Turning