07.96
Description
v
Siemens AG 1996 All Rights Reserved 6ZB5 430–0BH02–1AA0
SINUMERIK 805SM / 840C (BS)
Notes on product planning
As the product is generally part of larger systems or plants, these notes are
intended as a guideline for safe integration of a product in its environment.
Note the following in particular:
Note
Even when a maximum of safety has been included in the design of automa-
tion equipment, e.g. by means of a multi-channel configuration, the instruc-
tions given in the documentation must be followed exactly because incorrect
handling can render ineffective the preventive measures incorporated to
protect against dangerous faults or create new sources of danger.
Active and passive faults in automation equipment
Depending on the paricular task for which the electronic automation
equipment is used, both active and passive faults can be dangerous
faults. In the case of a drive control, for example, active faults are ge-
nerally dangerous because they lead to unauthorized startup of the drive.
On the other hand, a passive fault can result in a dangerous operating state
not being reported to the operator.
This differentiation between possible faults and their task-related classifi-
cation as dangerous and non-dangerous faults is important for all the
safety considerations in respect of the product supplied.
!
Warning
Wherever a fault in the automation equipment can cause serious material
damage or even physical injury, in other words wherever dangerous faults
can occur, additional external precautions must be taken or devices provided
which will insure or enforce safe operating conditions even in the event of a
fault (e.g. by means of independent limit switches, mechanical interlocks
etc.).
Note
The information contained in this documentation is checked and updated
regularly and can be changed at any time without further notice.
