Simpro Multi-Tip MT1200, Руководство пользователя

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The standard also defines the Performance Level that a given safety function must achieve
to reduce the risk to an acceptable level
– a value called Performance Level required (PLr) .
5.4.2 Identifying the required safety functions
To identify the safety functions required for a given machine, a site-specific hazard and risk
assessment must first be completed as per
§5.3 . Identified hazards that cannot be avoided or
eliminated must be addressed by appropriate safety functions.
5.4.3 Determining the Performance Level required (PLr)
As defined by the ISO 13849-1:2015 safety model, the minimum PLr for any given safety
function is derived from three parameters:
1. Severity of injury expected from the associated hazard
2. Frequency and/or duration of exposure to the associated hazard
3. Possibility of manually avoiding the associated hazard
The following table may be used to determine the minimum PLr from these parameters.
To demonstrate compliance with ISO 13849-1:2015, the minimum acceptable PLr of the
safety functions must be assessed for each identified hazard
in the specific conditions in
which the machine is to be used .
Safety function performance may be assessed as part of the regular Hazard and Risk
Assessment set out in
§5.3 . Although this assessment includes all hazards intrinsic to the
Multi-Tip design, other safety functions may be required to address site-specific hazards,
which can be evaluated using the blank spaces provided.
5.4.4 Achieving the Performance Level required (PLr)
Because all hazards intrinsic to the Multi-Tip design are addressed by safety functions with a
baseline performance of PLc, it follows that additional or uprated safety functions are only
required in the following cases:
1. The risk assessment identifies application-specific hazards which are not addressed by
the safety functions built into the standard Multi-Tip design.
2. The risk assessment identifies application-specific hazards which are sufficiently serious
and/or frequent as to require safety functions with a performance level of PLd or PLe.
Safety Function PLr Determination Table
Severity of injury
expected from hazard Frequency and/or duration
of exposure to hazard Possibility of manually
avoiding the hazard
Min PLr
Slight injury (reversible)
Seldom to quite often
and/or short exposure time
Possible under specific
conditions
PL(a)
Scarcely possible
PL(b)
Frequent to continuous
and/or long exposure time
Possible under specific
conditions
Scarcely possible
PL(c)
Serious injury or death
(irreversible)
Seldom to quite often
and/or short exposure time
Possible under specific
conditions
Scarcely possible
PL(d)
Frequent to continuous
and/or long exposure time
Possible under specific
conditions
Scarcely possible
PL(e)