ABB FSO-21, User Manual

Page: 26 / 540

26 Introduction to the manual
Profile Adaptation of the protocol for certain application field, for example,
drives.
PROFINET An open standard for industrial communication systems that uses the
Ethernet standard. Registered trademark of PROFIBUS and
PROFINET International (PI) community.
PROFIsafe An additional layer on top of the PROFINET protocol for safety-related
communication. Registered trademark of PROFIBUS and PROFINET
International (PI) community.
Proof test Periodic test performed to detect dangerous hidden failures in a safety-
related system so that, if necessary, a repair can restore the system to
an “as new” condition or as close as practical to this condition (61508-4,
3.8.5).
Protective measure Measure intended to achieve risk reduction
PZD Process data ( Prozessdaten )
Reasonably
foreseeable misuse Use of a machine in a way not intended by the designer, but which may
result from readily predictable human behavior
Reset Factory reset. Clears the configuration and sets the parameters to their
factory default values.
Residual risk Risk remaining after protective measures have been taken
Response time of
FSO The internal response time of the FSO, that is, the time in which the
STO control output of the FSO reacts after receiving a request. (Usually
this is not the same as the time from the request to the safe state of the
machine application.) See also term
Safety function response time
(SFRT) on page 26 .
Risk Combination of the probability of occurrence of harm and the severity of
that harm
Safe state STO activated. The STO circuit in the drive is open. Note : When the
drive STO is activated in the POUS function, the FSO is in the
Operational state. See also section
FSO states on page 60 .
Safety fieldbus Communication system used in safety-related applications. In the safety
system described in this manual, safe communication is secured with
the PROFIsafe application layer. See also term
PROFIsafe on page 26 .
Safety function Function, with a specified safety performance, which is intended to
maintain the safe condition of the installation or prevent hazardous
conditions arising at the installation. Example: Safe torque off (STO)
Safety function
response time
(SFRT) Worst-case elapsed time following an actuation of a safety sensor
connected to a fieldbus before the corresponding safe state of its safety
actuator(s) is achieved in the presence of errors or failures in the safety
function channel.
Response time of the combination of the drive and the FSO. See also
term
Response time of FSO on page 26 .
Safety module Part of a safety system, physical entity. Example: FSO safety functions
module.
Term /
Abbreviation Description