Instruction Manual PROTECT-PSC
V 2.6R01 / 04.19
2
–10
2.2.4
Definition of the stop categories
Stop category 0:
Stopping by immediately switching off the energy supply to the machine drives (i.e.
an uncontrolled stop).
Stop category 1:
A controlled stop whereby the power supply to the machine drives is maintained in
order to achieve the stop and the power supply is first cut when the stop is
achieved.
Stop category 2:
A controlled stop in which the power supply to the machine drives remains intact.
In the case of error the PROTECT-PSC performs a stop of category 0 for all the
outputs. The planner/programmer must check whether a desired STOP1/STOP2
shut-down can be realised under these aspects without endangering man and
machine. Accordingly, further measures are to be taken for applications using stop
categories 1 and 2 in order to guarantee the safety of man and machine in the
case of a error.
2.2.5
Emergency actions
In the case of emergency actions, a distinction must be made between a stop
signal of category 0 or a stop signal of category 1. Stop category 2 is not
admissible for emergency actions.
While stop category 0 or 1 comes into question for the implementation of
instructions applicable to stopping in an emergency (controlling of hazarders
motions) (cf. point 9.5.4.2), instructions aimed at shutting the system down in an
emergency (controlling of electrical hazards) may exclusively and also logically
belong to stop category 0 (cf. point 9.5.4.3).
By contrast with respect to stop 1 functions, the final shut-down of energy to the
machine drive element must be ensured by using electrotechnical equipment. This
means that the function may depend on an electronic switching logic (hard- or
software) and/or on the transmission of instructions via a communication network
or a data link if a contact-dependent output level (e.g. a relay level) takes care of
electrical isolation.
In accordance with the European and national preface to IEC 60204-1, it is
admissible to use electronic equipment for the realisation of stop 0 and stop 1
functions if the relevant standards have been heeded. In the case of PROTECT-
PSC, ISO 13849-1 has been observed.
Summary of Contents for PROTECT-PSC
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Page 265: ...Annex 8 Instruction Manual PROTECT PSC V 2 6R01 04 19 8 5 8 3 EC Type Examination certificate ...
Page 266: ...Annex 8 Instruction Manual PROTECT PSC V 2 6R01 04 19 8 6 8 4 Declarations of conformity W ...
Page 267: ...Annex 8 Instruction Manual PROTECT PSC V 2 6R01 04 19 8 7 8 5 Index ...