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Introduction
Introduction
*) Trademark
Some proper nouns such as product name or function
names may be registered as trademark or registered
trademark. Particularly this documentation does not
describes ® mark or
TM
mark.
D
Term
/
Abbreviation
Description
Dangerous failure
Failure of a component and/or
subsystem and/or system that
plays a part in implementing the
safety function
DC
Diagnostic coverage (%) (EN ISO
13849-1)
E
Term
/
Abbreviation
Description
EMC
Electromagnetic compatibility
EUC
Equipment Under Control
F
Term
/
Abbreviation
Description
Functional Safety
Part of the overall safety
relating to the EUC and the
EUC control system that
depends on the correct
functioning of the E/E/PE
safety-related systems and
other risk reduction
measures.
(IEC61508)
H
Term
/
Abbreviation
Description
HFT
Hardware
fault
tolerance
(IEC61508)
I
Term
/
Abbreviation
Description
I/O
Input / Output
IGBT
Insulated gate bipolar transistor
Inverter
model
code
The model code written on the
specification
label
of
the
inverter.
M
Term
/
Abbreviation
Description
Main power supply
Power supply necessary for
operation of inverter
MFG No.
Manufacturing No.
MTTFd
Mean time to dangerous failure
Expectation of the mean time to
dangerous failure
O
Term
/
Abbreviation
Description
Operator keypad
The keypad mounted on the
inverter used for configuration
of parameters and monitoring of
inverter's state
P
Term
/
Abbreviation
Description
PELV
Protected
extra-voltage
(EN/iEC60204)
PFD
Probability of dangerous failure
on demand (IEC61508)
PFH
Average
frequency
of
a
dangerous failure (EN/IEC61800-
5-2)
PL
Performance level (a-e) (EN ISO
13849-1)
PLC
Programmable logic controller
PWM
Pulse width modulation
R
Term
/
Abbreviation
Description
Residual risk
Risk remaining after protective
measures have been taken
Response time
Delay time inside of the inverter
from a request of activation of a
function until actual execution
of the function
Risk
Probability and severity of
hazard
S
Term
/
Abbreviation
Description
Safety Function
Safety functions to achieve safe
state of system such as STO
function defined in IEC61800-5-
2.
Safety-Related
System
Whole system including inverter,
sensor, switch and safety relay
etc.
that
achieves
safety
function(s)
SELV
Safety
extra-low
voltage
(EN/IEC60950)
SFF
Safe
failure
fraction
(%)
(IEC61508)
