Terms And Abbreviations - ABB ACS880-07CLC User Manual

ACS880-07CLC manuals

Terms and abbreviations

Term
Cat.
CCF
Control unit
DC
DI
DIIL
Drive
E-stop
Frame, frame size
HFT
Inverter unit
PFD
avg
PFH
PL
Proof test
SC
SIL
SILCL
STO
Stop category
Supply unit
T
1
Description
Classification of the safety-related parts of a control system in respect of their resistance
to faults and their subsequent behavior in the fault condition, and which is achieved
by the structural arrangement of the parts, fault detection and/or by their reliability.
The categories are: B, 1, 2, 3 and 4. (EN ISO 13849-1)
Common cause failure (%) (EN ISO 13849-1)
Control board built in a housing (often rail-mountable)
Diagnostic coverage (EN ISO 13849-1)
Digital input
Digital input interlock
Frequency converter for controlling AC motors
Emergency stop
Physical size of the drive or power module
Hardware fault tolerance (IEC 61508)
Inverter module(s) under control of one control unit, and related components. One
inverter unit typically controls one motor.
Average probability of dangerous failure on demand (IEC 61508)
Average frequency of dangerous failures per hour (IEC 61508)
Performance level. Levels a...e correspond to SIL (EN ISO 13849-1)
Periodic test performed to detect failures in a safety-related system so that, if neces-
sary, a repair can restore the system to an "as new" condition or as close as practical
to this condition. (IEC 61508, IEC 62061)
Systematic capability (IEC 61508)
Safety integrity level (1...3) (IEC 61508)
Maximum SIL (level 1...3) that can be claimed for a safety function or subsystem
(IEC/EN 62061)
Safe torque off (IEC/EN 61800-5-2)
There are three categories of stop functions defined by IEC/EN 60204-1:
•stop category 0: an uncontrolled stop where power to the machine actuators is re-
moved immediately (for example, STO)
•stop category 1: a controlled stop where the machine actuators have power for
stopping, after which the power is removed (SS1)
•stop category 2: a controlled stop where the machine actuators continue to have
power (SS2).
Supply module(s) under control of one control unit, and related components.
Proof test interval. Defines the probabilistic failure rate (PFH or PFD
function or subsystem. Performing a proof test at a maximum interval of T
to keep the SIL capability valid. The same interval must be followed to keep the PL
capability (EN ISO 13849) valid. Note that any T
as a guarantee or warranty.
Introduction to the manual 13
) for the safety
avg
1
values given cannot be regarded
1
is required