0 03.04 PrefaceIntended use 0 Siemens AG, 2004. All rights reservedSINUMERIK 840D/810D Operator's Guide HMI Embedded (BEM) – 03.04 Edition viiStructure of thedescriptionsWherever sensible and possible, all functions and operating optionshave been described using the same internal structure. By structuringthe explanations in different information levels, we have made itpossible for users to specifically access the required information.Explanation of symbolsFunctionThis theoretical part serves as a learning document, particularly forthose who are new to the world of NC applications. Importantinformation about understanding operating functions is offered tousers at this point.You should work through the manual at least once to get an overviewof the operational scope and performance capability of yourSINUMERIK control.Operating sequenceThis point shows the sequence of key operations which need to beexecuted. Any inputs or additional information required in theindividual operating steps are described next to the pictures of thekeys.NotesThis symbol is always displayed in this document to draw yourattention to an important item of information in a more complexdescription.Machine manufacturerFor safety reasons some functions are locked against unauthorizedaccess. The machine manufacturer can influence or change thedescribed functional behavior. Always refer to the information andspecifications provided by the machine manufacturer.Further informationFor safety reasons some functions are locked against unauthorizedaccess. The machine manufacturer can influence or change thedescribed functional behavior. Always refer to the information andspecifications provided by the machine manufacturer.Reference notesYou will find this symbol wherever further information on a particulartopic can be looked up in specialist literature.A complete list of available literature is included in the Appendix ofthis Operator's Guide.