Relectronic CDH 75 M, Руководство пользователя

Страница: 10 / 56

General information

TR-Electronic GmbH 2012, All Rights Reserved Printed in the Federal Republic of Germany
Page 10 of 56 TR - ECE - BA - GB - 0095 - 19 05/30/2018
MAC M edia A ccess C ontrol, Ethernet-ID
MTTF
d
M ean T ime T o F ailure (dangerous)
Mean time until dangerous failure
MRP
M edia R edundancy P rotocol
NRT N on- R eal- T ime communication
Operator
acknowl-
edgment
Switching from substitute values to process data
PAS P ublicly A vailable S pecification
Passivation
In the case of an F-Periphery with outputs, the F-System transmits
substitute values (e.g. 0) to the fail-safe outputs during a passivation
instead of the output values provided in the process image by the
safety program.
PFD
av
Av
erage
P
robability of
F
ailure on
D
emand
Average probability of failure of a safety function with low demand
PFH
P
robability of
F
ailure per
H
our
Operating mode with high requirement rate or continuous demand.
Probability of dangerous failure per hour.
PNO PROFIBUS User Organization ( P ROFIBUS N utzer O rganisation e.V.)
PROFIBUS Manufacturer independent, open field bus standard
PROFINET
PROFINET is the open Industrial Ethernet Standard of the PROFIBUS
User Organization for the automation.
Proof test
Recurring check for detection of hidden dangerous failures in a safety-
related system.
RT R eal -T ime communication
SCS
S afety C omputer S ystem with control function,
also referred to as F-Host in relation to PROFIsafe
SIL
S afety I ntegrity L evel: Four discrete levels (SIL1 to SIL4). The higher
the SIL of a safety-related system, the lower the probability that the
system cannot execute the required safety functions.
SIS
S afety I nstrumented S ystem: is used to protect a dangerous process
and reduce the risk of an accident. Process instruments are a
constituent of a Safety Instrumented System. This comprises the
essential components of a complete safety-relevant process unit:
Sensor, fail-safe processing unit (control) and actuator
Slot
Plug-in slot: can be meant also in the logical sense as addressing of
modules.
Subslot Adressing of data
SNMP S imple N etwork M anagement P rotocol
STP S hielded T wisted P air
Standard
measuring-
system
Definition:
Safety-related measuring system, without explosion protection
TCP T ransmission C ontrol P rotocol
UDP U ser D atagram P rotocol
VDE Association for Electrical, Electronic & Information Technologies
XML E X tensibl e M arkup L anguage