IFM Electronic Ecomat Mobile Series System Manual page 290

Glossary of Terms
•
hazard identification (intervention of
people, operating status of the machine,
foreseeable misuse) and
•
the risk estimation (degree of injury, extent
of damage, frequency and duration of the
risk, probability of occurrence, possibility of
avoiding the hazard or limiting the harm).
Risk assessment
Overall process comprising risk analysis and
risk evaluation.
According to Machinery Directive 2006/42/EU
the following applies: "The manufacturer of
machinery or his authorised representative
must ensure that a risk assessment is carried
out in order to determine the health and safety
requirements which apply to the machinery.
The machinery must then be designed and
constructed taking into account the results of
the risk assessment." (→ Annex 1, General
principles)
Risk evaluation
Judgement, on the basis of the risk analysis, of
whether risk reduction objectives have been
achieved.
ro
RO = read only for reading only
Unidirectional data transmission: Data can only
be read and not changed.
rw
RW = read/ write
Bidirectional data transmission: Data can be
read and also changed.
S
Safety function
Function of the machine whose failure can
result in an immediate increase of the risk(s).
The designer of such a machine therefore has
to:
- safely prevent a failure of the safety function,
- reliably detect a failure of the safety function
in time,
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ifm System Manual ecomatmobile SmartController (CR2500) V05
- bring the machine into a safe state in time in
the event of a failure of the safety function.
Safety-standard types
The safety standards in the field of machines
are structured as below:
Type-A standards (basic safety standards)
giving basic concepts, principles for design,
and general aspects that can be applied to all
machinery. Examples: basic terminology,
methodology (ISO 12100-1), technical
principles (ISO 12100-2), risk assessment
(ISO 14121), ...
Type-B standards (generic safety standards)
dealing with one safety aspect or one type of
safeguard that can be used across a wide
range of machinery.
•
Type-B1 standards on particular safety
aspects. Examples: safety distances
(EN 294), hand/arm speeds (EN 999),
safety-related parts of control systems
(ISO 13849), temperatures, noise, ...
•
Type-B2 standards on safeguards.
Examples: emergency stop circuits
((ISO 13850), two-hand controls,
interlocking devices or electro-sensitive
protective equipment (ISO 61496), ...
Type-C standards (machine safety standards)
dealing with detailed safety requirements for a
particular machine or group of machines.
SCT
In CANopen safety the Safeguard Cycle Time
(SCT) monitors the correct function of the
periodic transmission (data refresh) of the
SRDOs. The data must have been repeated
within the set time to be valid. Otherwise the
receiving controller signals a fault and passes
into the safe state (= outputs switched off).
SDO
SDO = Service Data Object.
SDO is a specification for a manufacturer-
dependent data structure for standardised data
access. "Clients" ask for the requested data
from "servers". The SDOs always consist of
8 bytes. Longer data packages are distributed
to several messages.