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03.04  Preface 
    Structure of manual
 
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Ó Siemens AG, 2004. All rights reserved 
SINUMERIK 840D/840Di/810D Operator's Guide HMI Advanced (BAD) – 03.04 Edition  ix 
 
      The following notes used in the documentation are of special 
significance: 
 
Notes 
This symbol appears in this documentation whenever it is necessary to
draw your attention to an important item of information. 
 
    In this documentation, you will find this symbol with a reference to an 
ordering option. The described function can only run if the control 
contains the designated option. 
 
   
Warnings 
The following warnings with varying degrees of severity appear in this 
document. 
 
Danger 
Indicates an imminently hazardous situation which, if not avoided, will 
result in death or serious injury or in substantial property damage. 
 
 
Warning 
Indicates a potentially hazardous situation which, if not avoided, could 
result in death or serious injury or in substantial property damage. 
 
 
Caution 
Used with the safety alert symbol indicates a potentially hazardous 
situation which, if not avoided, may result in minor or moderate injury 
or in property damage. 
 
   
Caution 
Used without safety alert symbol indicates a potentially hazardous 
situation which, if not avoided, may result in property damage. 
 
   
Notice 
Used without the safety alert symbol indicates a potential situation 
which, if not avoided, may result in an undesirable result or state. 
 
 
References 
This symbol appears whenever specific information can be found in 
other documentation. 
 complete list of available literature is included in the Appendix of this 
Operator's Guide.