This is the web edition of the original ‎⮫ AC500-S safety user manual, version 1.3.2. This web edition is provided for quick reference only. The original safety user manual must be used to meet functional safety application requirements.

1oo2

One-out-of-Two safety architecture, which means that it includes two channels connected in parallel, such that either channel can process the safety function.

AC500

ABB non-safety PLC

AC500-XC

ABB non-safety PLC suitable for extreme environmental conditions

AC500-S

ABB safety PLC for applications up to SIL 3 (IEC 61508), max. SIL 3 (IEC 62061) and PL e (ISO 13849-1)

AC500-S-XC

ABB safety PLC for applications up to SIL 3 (IEC 61508), max. SIL 3 (IEC 62061) and PL e (ISO 13849-1) suitable for extreme environmental conditions

AC500-S Programming Tool

IEC 61131-3 editor, included in engineering suite Automation Builder

ADC

Analog to digital converter

AOPD

Active opotoelectronic protective device

Automation Builder

Integrated engineering suite for ABB PLCs, including the AC500-S Programming Tool

CCF

Common cause failure

Control Builder Plus PS501

Integrated engineering suite for ABB PLCs, including the AC500-S Programming Tool, predecessor of Automation Builder

CPU

Central processing unit

CRC

Cyclic redundancy check. A number derived from and stored or transmitted with a block of data in order to detect data corruption.

DC

Diagnostic coverage

DPRAM

Dual-ported random access memory

DUT

Data unit type

IEC

International electro-technical commission standard

EDM

External device monitoring signal, which reflects the state transition of an actuator

EMC

Electromagnetic compatibility

EN

European norm (european standard)

EPROM

Erasable programmable read-only memory

Error severity

Indicated by a number. The lower the number is, the more critical is the displayed error.

E.g., "1" = the CPU does not start because the error does not allow a normal operation, "11" = different parameter settings

ESD

Electro static discharge

ESPE

Electro-sensitive protective equipment (for example a light curtain)

F-Host

Data processing unit that is able to perform a special protocol and to service the "black channel" ⮫ [2]

F-Device

Passive communication peer that is able to perform the special protocol, usually triggered by the F-Host for data exchange ⮫ [2]

F-Parameter

Fail-safe parameter as defined in ⮫ [2]

FAQ

Frequently asked questions

FB

Function block

FBD

Function block diagram (IEC 61131 programming language)

Flash memory

Non-volatile computer storage chip that can be electrically erased and reprogrammed

FSCP

Functional safety communication profile

FV

Fail-safe value

GSDML

Generic station description markup language

ID

Identification

IO controller

Controller that controls the automation task in PROFINET context

IO device

Field device, monitored and controlled by an IO controller in PROFINET context

iParameter

Individual safety device parameter

LAD

Ladder logic diagram (IEC 61131 programming language)

Loop-back

The programmable routing feature of a bus device re-routes unintentionally an F-Host message back to the F-Host, which expects a message of the same length (refer to ‎⮫ www.profisafe.net for further details).

LSB

Least significant bit

Max. SIL

Maximum safety integrity level (IEC 62061)

MSB

Most significant bit

MTBF

Mean time between failures

MTTF

Mean time to failure

Muting

Muting is the intended suppression of the safety function. This is required, e.g., when transporting the material into the danger zone.

NC

Break contact. Normally-closed contacts disconnect the circuit when the relay is activated; the circuit is connected when the relay is inactive.

NO

Make contact. Normally-open contacts connect the circuit when the relay is activated; the circuit is disconnected when the relay is inactive.

OEM

Original equipment manufacturer

OSSD

Output signal switching device

Passivation

The passivation is the special state of safety I/O modules which leads to the delivery of safe substitute values, which are ‘0’ values in AC500-S, to the safety CPU.

PC

Personal computer

PELV

Protective extra low voltage

PES

Programmable electronic system (refer to IEC 61508)

PFD

Probability of failure on demand

PFH

Probability of failure per hour

PL

Performance level according to ISO 13849-1

PLC

Programmable logic controller

POU

Program organization unit

Power cycle

Power cycle means to power off the safety CPU, wait for at least 1.5 s and power on the safety CPU again.

PROFIsafe

Safety-related bus profile of PROFIBUS DP/PA and PROFINET IO for communication between the safety program and the safety I/O in the safety system

PROFINET

Industrial technical standard for data communication over Industrial Ethernet

Proof Test Interval

The proof test is a periodic test performed to detect failures in a safety-related system so that, if necessary, the system can be restored as close as possible to its previous new state. The time period between these tests is the proof test interval.

PS

Programming system

PTC

Positive temperature coefficient

RAM

Random access memory

Reintegration

It is the process of switching from substitute values "0" to the process data.

RIOforFA

Profile for remote I/O for factory automation. To get quality information of a channel synchronously via the diagnosis mechanism. ⮫ [13]

Safety variable

It is a variable used to implement a safety function in a safety-related system

SCA

Safety code analysis - ABB software tool to automatically check the safety programming rules

SD card

Secure digital memory card

SELV

Safety extra low voltage

SFRT

Safety function response time

SIL

Safety integrity level (IEC 61508)

ST

Structured text (IEC 61131 programming language)

SVT

Safety Verification Tool - ABB software tool to verify the AC500-S safety configuration in Automation Builder

TCI

Tool Calling Interface ⮫ [14]

TÜV

Technischer Überwachungs-Verein (technical inspection association)

TWCDT

Total worst case delay time

ULP

Unit in the last place, which is the spacing between floating-point numbers, i.e., the value the least significant bit represents if it is 1 (refer to ‎⮫ http://en.wikipedia.org/wiki/Unit_in_the_last_place for more details).

WLAN

Wireless local area network