En 13849-1 On The Itnc 530 Hsci Without Functional Safety (Fs) - HEIDENHAIN iTNC 530 HSCI Technical Manual

6.11.15 EN 13849-1 on the iTNC 530 HSCI without functional safety (FS)

July 2013
The safety functions provided for you vary depending on the hardware and
software installed in the various HEIDENHAIN control systems.
On the iTNC 530 HSCI without functional safety (FS), no integrated safety
functions, such as safe operating modes or safely limited speed, are available.
The entire realization of these functions according to EN 13849-1 requires
external safety components. TÜV Süd only inspected this control in regard of
the safe switch-off of the drives.
The HEIDENHAIN safety system for the iTNC 530 HSCI without functional
safety (FS) has a dual-channel structure. Safety contactor combinations (SCC)
are central to the measurement and evaluation of all safety-relevant
assemblies (e.g. keylock switch, emergency stop button). The SCCs generate
output signals that are received as input signals by the two safety channels.
The safety functions are realized over dual-channel enabling of the function.
One channel is realized through external wiring with the SCCs to the enable
relays in the inverters. The second channel includes the control, which
consists of the main computer (MC) and one or more drive controller modules
(CC= controller computer). Safety-relevant errors always lead to safe stopping
of all drives through defined stop reactions.
The basic circuit diagram of the respective control serves as the basis for this
dual-channel design of cut-off paths. This is a non-binding proposal from
HEIDENHAIN, and must be adapted to the requirements of the machine used.
As a machine manufacturer, you are responsible for adhering to the relevant
standards and safety regulations.
The documentation on this topic consists of a system description with
application conditions from HEIDENHAIN. The requirements stated in this
document must be adhered to; the document is available from your
HEIDENHAIN contact person upon request.
The software used in the individual controls is not relevant for the dual-channel
cut-off paths and was therefore not examined by TÜV Süd. Only the hardware,
the inverters, and the external safety components used are decisive for the
evaluation of the cut-off paths.
In addition, the control-is-ready output of the iTNC 530 HSCI has only a single-
channel design and is therefore not a "safe" output. The control-is-ready output
in the HEIDENHAIN controls, however, serves as single-channel
acknowledgment signal to the SCCs and must be wired according to the basic
circuit diagrams.
6.11 Monitoring functions
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